• Welcome to TechPowerUp Forums, Guest! Please check out our forum guidelines for info related to our community.

Okay or no way? AMD RX 7800 XT with 560W PSU

Joined
Nov 18, 2010
Messages
7,052 (1.45/day)
Location
Rīga, Latvia
System Name HELLSTAR
Processor AMD RYZEN 9 5950X
Motherboard ASUS Strix X570-E
Cooling 2x 360 + 280 rads. 3x Gentle Typhoons, 3x Phanteks T30, 2x TT T140 . EK-Quantum Momentum Monoblock.
Memory 4x8GB G.SKILL Trident Z RGB F4-4133C19D-16GTZR 14-16-12-30-44
Video Card(s) Sapphire Pulse RX 7900XTX + under waterblock.
Storage Optane 900P[W11] + WD BLACK SN850X 4TB + 750 EVO 500GB + 1TB 980PRO[FEDORA]
Display(s) Philips PHL BDM3270 + Acer XV242Y
Case Lian Li O11 Dynamic EVO
Audio Device(s) Sound Blaster ZxR
Power Supply Fractal Design Newton R3 1000W
Mouse Razer Basilisk
Keyboard Razer BlackWidow V3 - Yellow Switch
Software FEDORA 39 / Windows 11 insider
The issue of course is whether the PSU is actually a quality unit with properly-set OCP!

Pretty hard set in stone, ATX standarts for that. It should not be longer, as in case of a real semiconductor failure, when the peak is past and smoke rises, resistance drops, it was too numb to detect the short, then the traces pop and melt, the PSU will not shut down and keep burning the PCB. What's so proper about it? It is a defensive mechanism not a feature. OCP is set way too high for many PSUs, actually the OPs Fractal PSU is also one of them.

It's not so bad.

This only works if you need more speed at the same wattage. If you wanna lower the wattage you need to lower the maximum clock as well. Usually, lowering it by 200 reduces wattage by 25 to 40 percent.

Depends on SKU. Also all that undervolting Mojo.... in reality all Radeons I've undervolted + underpowered recently were unstable doing it. Yes it works in some games, but it ain't stable. It is silicon lottery. Maybe you have a golden sample, okay... but for most, nope... then again we have full forums, hey my Radeon keeps crashing.
 
Joined
Feb 24, 2023
Messages
2,020 (5.47/day)
Location
Aston Martin DB7's boot
System Name DLSS / YOLO-PC
Processor i5-12400F / 10600KF
Motherboard Gigabyte B760M DS3H / Z490 Vision D
Cooling Laminar RM1 / Gammaxx 400
Memory 32 GB DDR4-3200 / 16 GB DDR4-3333
Video Card(s) RX 6700 XT / RX 480 8 GB
Storage A couple SSDs, m.2 NVMe included / 240 GB CX1 + 1 TB WD HDD
Display(s) Compit HA2704 / Viewsonic VX3276-MHD-2
Case Matrexx 55 / Junkyard special
Audio Device(s) Want loud, use headphones. Want quiet, use satellites.
Power Supply Thermaltake 1000 W / FSP Epsilon 700 W / Corsair CX650M [backup]
Mouse Don't disturb, cheese eating in progress...
Keyboard Makes some noise. Probably onto something.
VR HMD I live in real reality and don't need a virtual one.
Software Windows 10 and 11
in reality all Radeons I've undervolted + underpowered recently were unstable doing it
I also spent a lot of time finding stable numbers. Yet it's satisfying to have your GPU draw ~10 percent less energy whilst performing at the same level. You can also decrease the power draw without touching the voltage curve at all.
hey my Radeon keeps crashing.
Yeah, AMD could do a way better job manifesting the frequency-voltage curves.
 
Joined
Feb 20, 2019
Messages
7,023 (3.83/day)
System Name Bragging Rights
Processor Atom Z3735F 1.33GHz
Motherboard It has no markings but it's green
Cooling No, it's a 2.2W processor
Memory 2GB DDR3L-1333
Video Card(s) Gen7 Intel HD (4EU @ 311MHz)
Storage 32GB eMMC and 128GB Sandisk Extreme U3
Display(s) 10" IPS 1280x800 60Hz
Case Veddha T2
Audio Device(s) Apparently, yes
Power Supply Samsung 18W 5V fast-charger
Mouse MX Anywhere 2
Keyboard Logitech MX Keys (not Cherry MX at all)
VR HMD Samsung Oddyssey, not that I'd plug it into this though....
Software W10 21H1, barely
Benchmark Scores I once clocked a Celeron-300A to 564MHz on an Abit BE6 and it scored over 9000.
Pretty hard set in stone, ATX standarts for that. It should not be longer, as in case of a real semiconductor failure, when the peak is past and smoke rises, resistance drops, it was too numb to detect the short, then the traces pop and melt, the PSU will not shut down and keep burning the PCB. What's so proper about it? It is a defensive mechanism not a feature. OCP is set way too high for many PSUs, actually the OPs Fractal PSU is also one of them.
I think you're confusing OCP and OVP. OVP is binary - too much voltage can instantly fry components so it needs to be a binary and immediate cutoff.

Too much current simply generates more heat, which is why it's not necessary to panic for small, brief excursions. If something is rated for 10 amps 24/7 for years on end, it's not going to suddenly explode if it gets 15 amps for 50 milliseconds. The rate at which the components heat up to the point of damage is much like a fuse. A 10 amp fuse doesn't instantly blow at 11 amps. It doesn't blow until several whole seconds at 15 amps and to get "instant" blow in the sub-100ms range, you probably need 20-30A or more to generate enough heat fast enough to reach the plasticity temperature of 10A fuse wire.
 
Joined
Dec 25, 2020
Messages
4,157 (3.58/day)
Location
São Paulo, Brazil
System Name Project Kairi Mk. III "Lunar Tear"
Processor 13th Gen Intel Core i9-13900KS Special Edition
Motherboard MSI MEG Z690 ACE (MS-7D27) BIOS 1.F0
Cooling id-cooling Frostflow X 360 w/ Thermalright BCF and Thermal Grizzly Kryonaut Extreme
Memory G.SKILL Trident Z5 RGB 32GB DDR5-6800 F5-6800J3445G16GX2-TZ5RK @ 6400 MT/s 30-38-38-38-70-2
Video Card(s) ASUS ROG Strix GeForce RTX™ 4080 16GB GDDR6X White OC Edition
Storage 1x WD Black SN750 500 GB NVMe + 4x WD VelociRaptor HLFS 300 GB HDDs
Display(s) 55-inch LG G3 OLED
Case Cooler Master MasterFrame 700 in bench mode
Audio Device(s) EVGA Nu Audio (classic) + Sony MDR-V7 cans/KZ ZSX IEMs
Power Supply EVGA 1300 G2 1.3kW 80+ Gold
Mouse Razer DeathAdder Essential Mercury White
Keyboard Redragon Shiva Lunar White
Software Windows 10 Enterprise 22H2
Benchmark Scores "Speed isn't life, it just makes it go faster."
Yeah, AMD could do a way better job manifesting the frequency-voltage curves.

OT, but I often wonder if there is anything that AMD could not do a way better job at sometimes. It's frustrating.
 
Joined
Nov 18, 2010
Messages
7,052 (1.45/day)
Location
Rīga, Latvia
System Name HELLSTAR
Processor AMD RYZEN 9 5950X
Motherboard ASUS Strix X570-E
Cooling 2x 360 + 280 rads. 3x Gentle Typhoons, 3x Phanteks T30, 2x TT T140 . EK-Quantum Momentum Monoblock.
Memory 4x8GB G.SKILL Trident Z RGB F4-4133C19D-16GTZR 14-16-12-30-44
Video Card(s) Sapphire Pulse RX 7900XTX + under waterblock.
Storage Optane 900P[W11] + WD BLACK SN850X 4TB + 750 EVO 500GB + 1TB 980PRO[FEDORA]
Display(s) Philips PHL BDM3270 + Acer XV242Y
Case Lian Li O11 Dynamic EVO
Audio Device(s) Sound Blaster ZxR
Power Supply Fractal Design Newton R3 1000W
Mouse Razer Basilisk
Keyboard Razer BlackWidow V3 - Yellow Switch
Software FEDORA 39 / Windows 11 insider
Yeah, AMD could do a way better job manifesting the frequency-voltage curves.

You are forgetting that it is temperature dependent too, AMD doesn't dictate FAN curves for OEMs to use. You get the idea who to blame really?

I think you're confusing OCP and OVP. OVP is binary - too much voltage can instantly fry components so it needs to be a binary and immediate cutoff.

Certainly not. Totally different case.

I guess if you haven't seen a different class of fuses, as those vary a lot by speed, for each application and device there is a proper one, those are not made equal unless you put a crowbar in the fuse box.

But here we a looking at voltage curve rise across the internal shunt and the watchdog that monitors it. Regarding other statements about current generates more heat etc... you need to refresh some basic electronics. I am not sure what's that about, but it ain't related here.

We are talking about protection. Catastrophic failure means a short, short means infinite current doing simple math. How OVP is connected here? UVP, okay, then some math aligns. So when a semiconductor failure event occurs it is a short, but as everything burns fast as it wants to consume infinite current, explodes, pops, the short turns into resitor(it means current drops down), and the PSU treats it as a normal load and keeps working. They key word is in the timing how fast. The ATX standart is calculated and manufacturers are disobeying it. It is a flaw.

On most parts it needs to be software configured in the watchdog IC, but most just don't do that, contrary to decrease RMA rates they set it too high to get rid of some clients using their PSU's on the limit, simple as that.

Now while I am writing we have a second fanboy rant... lol...
 

freeagent

Moderator
Staff member
Joined
Sep 16, 2018
Messages
7,294 (3.66/day)
Location
Winnipeg, Canada
System Name Altered Beast
Processor AMD R9 5900X, 5800X3D
Motherboard Asus Crosshair VIII Dark Hero
Cooling Thermalright Frost Commander 140, NF-A14 3K, T30
Memory 2x8 G.Skill Trident Z Royal 3200C14, 2x8GB G.Skill Trident Z Black and White 3200 C14
Video Card(s) Zotac 4070 Ti Trinity OC
Storage WD SN850X 2TB, SN850 1TB, SN770 1TB - Asus Hyper M.2, SN770 1TB, SN750 500GB
Display(s) LG 50UP7100
Case Fractal Torrent Compact RGB
Audio Device(s) JBL 2.1 Deep Bass
Power Supply EVGA SuperNova 750w G+, Monster HDP1800
Mouse Zowie EC2 Evo
Keyboard Logitech G213
Software Yes
Benchmark Scores Yes
OT, but I often wonder if there is anything that AMD could not do a way better job at sometimes. It's frustrating.
Change their name back to ATi and it will sort itself out ;)
Even some Nvidia fanboy came in.
Why do you gotta be like that? Maybe you need to take a break?
 
Joined
Feb 24, 2023
Messages
2,020 (5.47/day)
Location
Aston Martin DB7's boot
System Name DLSS / YOLO-PC
Processor i5-12400F / 10600KF
Motherboard Gigabyte B760M DS3H / Z490 Vision D
Cooling Laminar RM1 / Gammaxx 400
Memory 32 GB DDR4-3200 / 16 GB DDR4-3333
Video Card(s) RX 6700 XT / RX 480 8 GB
Storage A couple SSDs, m.2 NVMe included / 240 GB CX1 + 1 TB WD HDD
Display(s) Compit HA2704 / Viewsonic VX3276-MHD-2
Case Matrexx 55 / Junkyard special
Audio Device(s) Want loud, use headphones. Want quiet, use satellites.
Power Supply Thermaltake 1000 W / FSP Epsilon 700 W / Corsair CX650M [backup]
Mouse Don't disturb, cheese eating in progress...
Keyboard Makes some noise. Probably onto something.
VR HMD I live in real reality and don't need a virtual one.
Software Windows 10 and 11
You are forgetting that it is temperature dependent too
1700495801040.png
Cut-down GPUs usually have a massive overkill in terms of VRM capacity. VRAM? Overheating of this part is usually an RTX 3090 meme, not the case for most latest AMD GPUs and non-3090 nVidia ones.

The main concern still is pushing too much voltage and/or current upon the GPU at the peak load and insufficient delivery under light loads which leads to massive power spikes when GPU is 100% utilised and to crashes when load isn't as apparent. Wild temperatures are a rare case.
 
Joined
Nov 18, 2010
Messages
7,052 (1.45/day)
Location
Rīga, Latvia
System Name HELLSTAR
Processor AMD RYZEN 9 5950X
Motherboard ASUS Strix X570-E
Cooling 2x 360 + 280 rads. 3x Gentle Typhoons, 3x Phanteks T30, 2x TT T140 . EK-Quantum Momentum Monoblock.
Memory 4x8GB G.SKILL Trident Z RGB F4-4133C19D-16GTZR 14-16-12-30-44
Video Card(s) Sapphire Pulse RX 7900XTX + under waterblock.
Storage Optane 900P[W11] + WD BLACK SN850X 4TB + 750 EVO 500GB + 1TB 980PRO[FEDORA]
Display(s) Philips PHL BDM3270 + Acer XV242Y
Case Lian Li O11 Dynamic EVO
Audio Device(s) Sound Blaster ZxR
Power Supply Fractal Design Newton R3 1000W
Mouse Razer Basilisk
Keyboard Razer BlackWidow V3 - Yellow Switch
Software FEDORA 39 / Windows 11 insider
Why do you gotta be like that? Maybe you need to take a break?

I cannot see how praising other maker or even bashing AMD helps understanding PSU compatibility and qualities with certain AMD GPU. Or I am not understanding something about moderation.

Cut-down GPUs usually have a massive overkill in terms of VRM capacity. VRAM?

It is much more... hotspots are the new kids in the block also. Quality, evenness, bending, Fan Curves, ambient temps, airflow... it all contributes for the clock stability, and it massively differs from user to user even for cut down SKU's.
 

freeagent

Moderator
Staff member
Joined
Sep 16, 2018
Messages
7,294 (3.66/day)
Location
Winnipeg, Canada
System Name Altered Beast
Processor AMD R9 5900X, 5800X3D
Motherboard Asus Crosshair VIII Dark Hero
Cooling Thermalright Frost Commander 140, NF-A14 3K, T30
Memory 2x8 G.Skill Trident Z Royal 3200C14, 2x8GB G.Skill Trident Z Black and White 3200 C14
Video Card(s) Zotac 4070 Ti Trinity OC
Storage WD SN850X 2TB, SN850 1TB, SN770 1TB - Asus Hyper M.2, SN770 1TB, SN750 500GB
Display(s) LG 50UP7100
Case Fractal Torrent Compact RGB
Audio Device(s) JBL 2.1 Deep Bass
Power Supply EVGA SuperNova 750w G+, Monster HDP1800
Mouse Zowie EC2 Evo
Keyboard Logitech G213
Software Yes
Benchmark Scores Yes
I cannot see how praising other maker or even bashing AMD
No one was bashing AMD? I certainly was not, the person who suggested a 4070 instead certainly was not..

We know these GPUs spike pretty hard, not a new concept. But if he runs a low core count CPU, with very little attached, we just said he might be ok.

But lets be real, at under 600w he will have a problem at some point.

I do not understand why so much emotion has to be placed into hardware. It is just hardware.
 
Joined
Dec 25, 2020
Messages
4,157 (3.58/day)
Location
São Paulo, Brazil
System Name Project Kairi Mk. III "Lunar Tear"
Processor 13th Gen Intel Core i9-13900KS Special Edition
Motherboard MSI MEG Z690 ACE (MS-7D27) BIOS 1.F0
Cooling id-cooling Frostflow X 360 w/ Thermalright BCF and Thermal Grizzly Kryonaut Extreme
Memory G.SKILL Trident Z5 RGB 32GB DDR5-6800 F5-6800J3445G16GX2-TZ5RK @ 6400 MT/s 30-38-38-38-70-2
Video Card(s) ASUS ROG Strix GeForce RTX™ 4080 16GB GDDR6X White OC Edition
Storage 1x WD Black SN750 500 GB NVMe + 4x WD VelociRaptor HLFS 300 GB HDDs
Display(s) 55-inch LG G3 OLED
Case Cooler Master MasterFrame 700 in bench mode
Audio Device(s) EVGA Nu Audio (classic) + Sony MDR-V7 cans/KZ ZSX IEMs
Power Supply EVGA 1300 G2 1.3kW 80+ Gold
Mouse Razer DeathAdder Essential Mercury White
Keyboard Redragon Shiva Lunar White
Software Windows 10 Enterprise 22H2
Benchmark Scores "Speed isn't life, it just makes it go faster."
My suggestion for the 4070 was with power efficiency in mind + the studio drivers optimized for the OPs productivity suite which AMD doesn't provide.

Said characteristics make of the 4070 a better choice of product if gaming isn't the strict focus, it won't run a risk of overloading the power supply and behave better in these applications. The 50 watt differential here correspond to almost 10% of the PSU's capacity.



Arguably, the 7800 XT is a better card for games, as long as you're not too keen on RT, but in this segment it's non issue, IMO.

It wasn't a fanboy pitch; and while I do have my differences with AMD as of late (especially since they can't stop bungling it at every turn), it was a mere suggestion.
 

freeagent

Moderator
Staff member
Joined
Sep 16, 2018
Messages
7,294 (3.66/day)
Location
Winnipeg, Canada
System Name Altered Beast
Processor AMD R9 5900X, 5800X3D
Motherboard Asus Crosshair VIII Dark Hero
Cooling Thermalright Frost Commander 140, NF-A14 3K, T30
Memory 2x8 G.Skill Trident Z Royal 3200C14, 2x8GB G.Skill Trident Z Black and White 3200 C14
Video Card(s) Zotac 4070 Ti Trinity OC
Storage WD SN850X 2TB, SN850 1TB, SN770 1TB - Asus Hyper M.2, SN770 1TB, SN750 500GB
Display(s) LG 50UP7100
Case Fractal Torrent Compact RGB
Audio Device(s) JBL 2.1 Deep Bass
Power Supply EVGA SuperNova 750w G+, Monster HDP1800
Mouse Zowie EC2 Evo
Keyboard Logitech G213
Software Yes
Benchmark Scores Yes
I know my Ti can do about 350w, with swings up to 400w, with my OC, I cant imagine the vanilla being too far behind.

This is not usually in game though, but with F@H. Though some benchmarks can push it close.
 
Joined
Nov 18, 2010
Messages
7,052 (1.45/day)
Location
Rīga, Latvia
System Name HELLSTAR
Processor AMD RYZEN 9 5950X
Motherboard ASUS Strix X570-E
Cooling 2x 360 + 280 rads. 3x Gentle Typhoons, 3x Phanteks T30, 2x TT T140 . EK-Quantum Momentum Monoblock.
Memory 4x8GB G.SKILL Trident Z RGB F4-4133C19D-16GTZR 14-16-12-30-44
Video Card(s) Sapphire Pulse RX 7900XTX + under waterblock.
Storage Optane 900P[W11] + WD BLACK SN850X 4TB + 750 EVO 500GB + 1TB 980PRO[FEDORA]
Display(s) Philips PHL BDM3270 + Acer XV242Y
Case Lian Li O11 Dynamic EVO
Audio Device(s) Sound Blaster ZxR
Power Supply Fractal Design Newton R3 1000W
Mouse Razer Basilisk
Keyboard Razer BlackWidow V3 - Yellow Switch
Software FEDORA 39 / Windows 11 insider
I do not understand why so much emotion has to be placed into hardware. It is just hardware.

I work daily in RMA business and see bad choices made by people not understanding basic things. It is not only about it should work.

If others are ignorant, okay. But at least someone will re read it after googling and understand what's what especially regarding safety.

Regarding nvidia and complaints about AMD, well I see it totally out of place for this topic.
 
Joined
Dec 25, 2020
Messages
4,157 (3.58/day)
Location
São Paulo, Brazil
System Name Project Kairi Mk. III "Lunar Tear"
Processor 13th Gen Intel Core i9-13900KS Special Edition
Motherboard MSI MEG Z690 ACE (MS-7D27) BIOS 1.F0
Cooling id-cooling Frostflow X 360 w/ Thermalright BCF and Thermal Grizzly Kryonaut Extreme
Memory G.SKILL Trident Z5 RGB 32GB DDR5-6800 F5-6800J3445G16GX2-TZ5RK @ 6400 MT/s 30-38-38-38-70-2
Video Card(s) ASUS ROG Strix GeForce RTX™ 4080 16GB GDDR6X White OC Edition
Storage 1x WD Black SN750 500 GB NVMe + 4x WD VelociRaptor HLFS 300 GB HDDs
Display(s) 55-inch LG G3 OLED
Case Cooler Master MasterFrame 700 in bench mode
Audio Device(s) EVGA Nu Audio (classic) + Sony MDR-V7 cans/KZ ZSX IEMs
Power Supply EVGA 1300 G2 1.3kW 80+ Gold
Mouse Razer DeathAdder Essential Mercury White
Keyboard Redragon Shiva Lunar White
Software Windows 10 Enterprise 22H2
Benchmark Scores "Speed isn't life, it just makes it go faster."
I work daily in RMA business and see bad choices made by people not understanding basic things. It is not only about it should work.

If others are ignorant, okay. But at least someone will re read it after googling and understand what's what especially regarding safety.

Regarding nvidia and complaints about AMD, well I see it totally out of place for this topic.

Maybe, but I'd argue that it's constructive to the topic to recommend an alternative which is arguably a better fit for OP's usage pattern and profile. They are a casual gamer who occasionally work with 3D modeling on their system. To that end, the Nvidia card has better driver support, more gaming features, is a better productivity solution and uses less power, which means that it's useful advice to recommend this alternative. By all means if they're willing to spend additional money replacing the power supply to accommodate the Radeon's increased power footprint and are fully aware that they will have to accept certain compromises by making this choice.

More power = higher strain on the power supply = higher temperatures = less stability, and it's already treading a fine line here, IMO. OP's case seems to be a Lian Li Air Mini, so while it's a small case, it has adequate airflow, so this may not be that much of a problem, for now.

Either way, this thread seems to be a couple of months old, so I'm unsure if OP already made a decision of their own regarding this.
 
Joined
Aug 10, 2019
Messages
23 (0.01/day)
System Name RaptorLake
Processor Intel Core i5-13600K
Motherboard Gigabyte Z690M AORUS ELITE AX DDR4
Cooling Noctua NH-D15
Memory Corsair Vengeance LPX CMK32GX4M2D3600C16
Video Card(s) Powercolor Hellhound RX 7800 Xt
Storage Samsung 980 Pro 2TB + Samsung 980 Pro 1TB
Display(s) Lenovo ThinkVision P40w-20
Case Lian Li O11 Air Mini Black
Audio Device(s) Audioengine D3 USB DAC + Audioengine A5+ Black
Power Supply Fractal Design Ion+ 2 Platinum 560W
Mouse Logitech MX Master 3S
Keyboard Logitech Cordless Desktop Wave Pro
Any updates? Would be interested in hearing about your results
I have my Powercolor Hellhound RX7800XT a couple of weeks now.
As mentioned I did already do a 100mV undervolt of my CPU earlier, and also undervolted the GPU to 1060mV while running it in silent mode.
--> No problems what so ever with my 560W PSU... Everything runs rock solid.
 
Joined
Jan 25, 2020
Messages
1,951 (1.30/day)
System Name DadsBadAss
Processor I7 13700k w/ HEATKILLER IV PRO Copper Nickel
Motherboard MSI Z790 Tomahawk Wifi DDR4
Cooling BarrowCH Boxfish 200mm-HWLabs SR2 420/GTX&GTS 360-BP Dual D5 MOD TOP- 2x Koolance PMP 450S
Memory 4x8gb HyperX Predator RGB DDR4 4000
Video Card(s) Asrock 6800xt PG D w/ Byski A-AR6900XT-X
Storage WD SN850x 1TB NVME M.2/Adata XPG SX8200 PRO 1TB NVMe M.2
Display(s) Acer XG270HU
Case ThermalTake X71 w/5 Noctua NF-A14 2000 IP67 PWM/3 Noctua NF-F12 2000 IP67 PWM/3 CorsairML120 Pro RGB
Audio Device(s) Klipsch Promedia 2.1
Power Supply Seasonic Focus PX-850 w/CableMod PRO ModMesh RT-Series Black/Blue
Mouse Logitech G502
Keyboard Black Aluminun Mechanical Clicky Thing With Blue LEDs, hows that for a name?!
Software Win11pro
I have my Powercolor Hellhound RX7800XT a couple of weeks now.
As mentioned I did already do a 100mV undervolt of my CPU earlier, and also undervolted the GPU to 1060mV while running it in silent mode.
--> No problems what so ever with my 560W PSU... Everything runs rock solid.
Thanks for coming back and updating your experience. I had literally just started typing to ask if you ever came back to say how things worked out for you.
 
Joined
Oct 4, 2023
Messages
4 (0.03/day)
Location
Norway
System Name New Desktop/old desktop/laptop
Processor i5-12600k/i7-8700/R7 6800HS
Motherboard ASUS PRIME H670-PLUS D4/MSI Z370-A PRO/Lenovo Yoga Slim 7
Memory 16GB DDR4 4400/16GB DDR4 2666/16GB LPDDR5 6400
Video Card(s) XFX QICK RX 7800 XT/MSI RX 5700 MECH/Radeon 680M
Storage 1TB PCIex4 M2, 512GB PCIex3 M2, 8TB+16TB/1TB PCIex3 M2/512GB PCIex3 M2
Display(s) Philips 27" 4K/LG48"CX 4K/16" 2560x1600
Power Supply Fractal ION+ 560W/Silver Power SP-SS750M/Lenovo 100W
I have the same psu and a RX 7800XT . No problems here as well.
 
Joined
Feb 20, 2019
Messages
7,023 (3.83/day)
System Name Bragging Rights
Processor Atom Z3735F 1.33GHz
Motherboard It has no markings but it's green
Cooling No, it's a 2.2W processor
Memory 2GB DDR3L-1333
Video Card(s) Gen7 Intel HD (4EU @ 311MHz)
Storage 32GB eMMC and 128GB Sandisk Extreme U3
Display(s) 10" IPS 1280x800 60Hz
Case Veddha T2
Audio Device(s) Apparently, yes
Power Supply Samsung 18W 5V fast-charger
Mouse MX Anywhere 2
Keyboard Logitech MX Keys (not Cherry MX at all)
VR HMD Samsung Oddyssey, not that I'd plug it into this though....
Software W10 21H1, barely
Benchmark Scores I once clocked a Celeron-300A to 564MHz on an Abit BE6 and it scored over 9000.
Certainly not. Totally different case.

We are talking about protection. Catastrophic failure means a short, short means infinite current doing simple math. How OVP is connected here? UVP, okay, then some math aligns. So when a semiconductor failure event occurs it is a short, but as everything burns fast as it wants to consume infinite current, explodes, pops, the short turns into resitor(it means current drops down), and the PSU treats it as a normal load and keeps working. They key word is in the timing how fast. The ATX standart is calculated and manufacturers are disobeying it. It is a flaw.

On most parts it needs to be software configured in the watchdog IC, but most just don't do that, contrary to decrease RMA rates they set it too high to get rid of some clients using their PSU's on the limit, simple as that.
You appear to be mis-remembering or misinterpreting the ATX specification.

There's no point repeatedly arguing "the ATX standard" in your defence because the ATX standard specifically has a detailed section with formula for exactly how far a PCIe CEM device such as a graphics card can exceed the OCP limit and for how long. The standard absolutely, 100% includes precisely what you're arguing it does not have:

Page 21 and 21 of the ATX standard
Table 3-1: PCI Express* CEM Add-in Card Power Excursion Limits Table(45)

I was paraphrasing earlier, but I'll say it again. Going over the OCP limit with brief transient current spikes is not an issue, and if it causes an issue then the PSU is faulty by design because the OCP isn't up to the ATX spec you keep quoting as gospel. It clearly has a table of logarithmic formulae and a graph defining, essentially that the larger the excursion beyond the limits, the shorter the duration of the trigger can be.

1700512781869.png

You can see that a 10ms transient spike is allowed to be 50% higher than the rated current, and a 20ms transient is allowed around 40% higher currents before OCP can be triggered. Table 3-3 on page 24 is more relevant to this post as it's a total system power draw that says a PSU has to handle power spikes at 160% of its rated load for 10ms and 120% of its rated load for 100ms.
It's literally the spec.

edit:
terrifyingly, for a 600W graphics card, 1800W is permitted, albeit only for 0.1ms
:O
 
Last edited:
Joined
Dec 25, 2020
Messages
4,157 (3.58/day)
Location
São Paulo, Brazil
System Name Project Kairi Mk. III "Lunar Tear"
Processor 13th Gen Intel Core i9-13900KS Special Edition
Motherboard MSI MEG Z690 ACE (MS-7D27) BIOS 1.F0
Cooling id-cooling Frostflow X 360 w/ Thermalright BCF and Thermal Grizzly Kryonaut Extreme
Memory G.SKILL Trident Z5 RGB 32GB DDR5-6800 F5-6800J3445G16GX2-TZ5RK @ 6400 MT/s 30-38-38-38-70-2
Video Card(s) ASUS ROG Strix GeForce RTX™ 4080 16GB GDDR6X White OC Edition
Storage 1x WD Black SN750 500 GB NVMe + 4x WD VelociRaptor HLFS 300 GB HDDs
Display(s) 55-inch LG G3 OLED
Case Cooler Master MasterFrame 700 in bench mode
Audio Device(s) EVGA Nu Audio (classic) + Sony MDR-V7 cans/KZ ZSX IEMs
Power Supply EVGA 1300 G2 1.3kW 80+ Gold
Mouse Razer DeathAdder Essential Mercury White
Keyboard Redragon Shiva Lunar White
Software Windows 10 Enterprise 22H2
Benchmark Scores "Speed isn't life, it just makes it go faster."
I have my Powercolor Hellhound RX7800XT a couple of weeks now.
As mentioned I did already do a 100mV undervolt of my CPU earlier, and also undervolted the GPU to 1060mV while running it in silent mode.
--> No problems what so ever with my 560W PSU... Everything runs rock solid.

I'm glad it worked out for you in the end. Enjoy! :)
 

Oconner

New Member
Joined
Sep 10, 2023
Messages
7 (0.04/day)
Back after some time, now, with my ASRock RX 7800XT Phantom Gaming.

I have some reports regarding my used power supply: MSI MAG A650BN 650w.

Well, we know that this source is not tier A, nor is it at the top of tier B.
I live in Brazil, and we recently discovered that MSI changed one of the capacitors in the batches sold here, making the source even less reliable.
(I recommend that anyone living abroad also check out this information)

With my card in hand, I decided to carry out some overclocking tests, with increased power, and to my surprise, all the ones I tried, in fact, had at least worse results in the TIMESPY benchmark, compared to the card without overclocking.

At that moment I didn't have powerful games to test, so it was the best scenario I could do.
I believe that these poor results are due to the limitation of the source, which when greater power was requested, was unable to deliver.

Here is the comparison result:



The overclock used was the same as suggested by the analysis of the RX 7800XT Phantom Gaming model by TechpowerUp

Just to add:
Under normal conditions, playing games like:
Farcry 6 4k ultra
Farming Simulator 4k ultra
Which was the heaviest I've been able to test so far, the power supply is carrying the card smoothly, without any sign of loss of performance.
I am back
I upgraded my PSU, now with an MSI A750GL 750W 80 Plus Gold.(Wow, how hard and difficult the cables are)

A little over, and these are my results:

1701347149559.png

Info:
1701347119032.png

It seems that in the silicon lottery, I didn't have much luck.

As I said previously, I used the overclock suggested in the Phanton Gaming review, from TechPowerUp, as a basis, and I couldn't even come close to the values used.
This is the one I used last that didn't give a green screen, I accept suggestions if there is an incorrect value.
I'm still learning about it.

1701347549920.png

1701347560360.png
 

3x0

Joined
Oct 6, 2022
Messages
868 (1.70/day)
Processor AMD Ryzen 7 5800X3D
Motherboard MSI MPG B550I Gaming Edge Wi-Fi ITX
Cooling Scythe Fuma 2 rev. B Noctua NF-A12x25 Edition
Memory 2x16GiB G.Skill TridentZ DDR4 3200Mb/s CL14 F4-3200C14D-32GTZKW
Video Card(s) PowerColor Radeon RX7800 XT Hellhound 16GiB
Storage Western Digital Black SN850 WDS100T1X0E-00AFY0 1TiB, Western Digital Blue 3D WDS200T2B0A 2TiB
Display(s) Dell G2724D 27" IPS 1440P 165Hz, ASUS VG259QM 25” IPS 1080P 240Hz
Case Cooler Master NR200P ITX
Audio Device(s) Altec Lansing 220, HyperX Cloud II
Power Supply Corsair SF750 Platinum 750W SFX
Mouse Lamzu Atlantis Mini Wireless
Keyboard HyperX Alloy Origins Aqua
Just to let everyone know, Seasonic SFX 500W is sufficient for this GPU.
 
Top