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Amd 6800 XT - PSU enough?

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I have the Seasonic Prime 650-TX 80 Plus Titanium.
I want to upgrade the gpu to Amd 6800 XT.
Looking at the review for this card here on TPU i see it needs a minimum of 650w psu,.... Which i have.

If i go to Seasonic calculator page it tells me i need a 850w psu.
My specs are on the left( next to my profile).


What do you think will happen worst case scenario? The card will underperform, in which case its wasted money, or even worse, sudden loss of power like PC restarts when gaming?
 
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Don't worry, your PSU will be fine. Worst case scenario you will be forced to downclock your 6800 XT by 100 MHz which will result in a negligible performance loss (up to 3 percent). I'm telling your from my experience of running two GTX 1070s using a similar PSU for 4 years straight.
 

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@Cvrk I don't think the issue is that 650W won't run a 6800XT's TDP, more that some of the Navi21 cards have had serious transient spike issues that can cause problems with PSUs that otherwise should provide more than enough power. iirc that mostly resulted in restarts or crashes.

It's hard to say with certainty. Back then TPU didn't test for transients before at least 6950XT, and later graphs suggest that 6900XT was by far the worst, and 6800XT was mostly in line with other RDNA and Ampere cards. Bigger 30 series cards were also big time offenders but the graphs speak for themselves concerning the 6900XT.

I haven't seen any exhaustive testing of this or deep dives as to the cause, but later released cards like 6950XT and Navi31 seem to put the issue behind them.
 
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You can calculate the needed Power on your own.
If i go to Seasonic calculator page it tells me i need a 850w psu.

It seems Seasonic has a calculater as well.

Nothing wrong with the be quiet calculator though, I use it myself as well.
 

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My system will shut down my Prime GX-750 so hard that I have to trip the switch.

Edit:

Good thing I was forced to buy a cheap PSU when I bought my GPU..
 
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serious transient spike issues that can cause problems
No more than 4 hundred watts if we speak about 6800 XT. And even the slightest underclock by 100ish MHz pulls it down by 50s of watts.
 
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@tabascosauz the simptons you referring sound copy pasted from my RX 480 back 8 years ago.
Looking at reviews the amd 7900xtx ( the latest from amd) has huge power issues and driver problem on Windows 11. Not the same cam be said about the XT version which looks very stable.

Right now the 6800 XT is heavely discounted on the second hand market. Looking at 380 EUR. And the performance vs price is superb. The prices are not going up, it's going to be even cheaper or same.


Really feel like i wanna push a bit more my system, since last year i added a new cpuc.

Maybe should wait on fall, for the 7800 XT?? Afraid it might ask for a bigger PSU. Not to mention newer cards need better motherboards.
You lose 3% from PSU. 10% from mobo and it feels like wasted money.
 
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should wait
Seems reasonable but not because of the reasons you stated (especially the 10% drop from the mobo which has nothing to do with reality: cards like 6800 XT lose no more than 1 percent if run at PCI-E 3.0 mode) and because the difference between your 5700 XT and 6800 XT is nothing to be impressed by. I'd rather go for a 7900 XTX. This card is capable of any 1440p even if downclocked by 5 to 15 percent because of somewhat weak PSU. And no, don't you worry about your mobo being PCI-E 3.0 if you go 7900 XTX. Worry about your CPU not being 5800X3D xD
 
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transients are pretty massive on RDNA2 but from my experience your PSU would only be on the edge if you would pair the GPU with a 13900K and overclock both.
 
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Seems reasonable but not because of the reasons you stated (especially the 10% drop from the mobo which has nothing to do with reality: cards like 6800 XT lose no more than 1 percent if run at PCI-E 3.0 mode) and because the difference between your 5700 XT and 6800 XT is nothing to be impressed by. I'd rather go for a 7900 XTX. This card is capable of any 1440p even if downclocked by 5 to 15 percent because of somewhat weak PSU. And no, don't you worry about your mobo being PCI-E 3.0 if you go 7900 XTX. Worry about your CPU not being 5800X3D xD
40% on average in TPU's review at 1440p and nearly 50% at 4k, i'd add another 10%+- to those numbers through driver optimisations, the 6800 XT is by far a very decent upgrade from a 5700 XT, not too mention the xtx will cost +$600 than the 6800 XT :rolleyes:
 
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Nothing wrong with the be quiet calculator though, I use it myself as well.
Let's see if the calculators are fine. I'm building a new rig and got a new 1.000W PSU. The calculator says that i will need at least 852W. Worse because my actual PSU has 850W. Id the calculation is correct my system will work. :D
 
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40% on average in TPU's review at 1440p and nearly 50% at 4k, i'd add another 10%+- to those numbers through driver optimisations, the 6800 XT is by far a very decent upgrade from a 5700 XT, not too mention the xtx will cost +$600 than the 6800 XT :rolleyes:
That's the opposite of a very decent. It's just... "yes, it runs faster."

Very decent upgrade is going more than +150%.
 
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Yeah in 2k, which is what i game in in tests i see 30-50 frames more for 6800xt.

Right now my 5700 xt can't hold 60 anymore in 2k. Dips in 50 or 40ish fps.


For about 380EUR i could 60+ anything & push my old rig 2 more years.

But yeah, you guys give me confidence that my PSU can handle.


The 4070TI from what Techpowerup shows has same energy consumption. But I can't find that card in my region on the second hand (not this year).
 
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Let's see if the calculators are fine. I'm building a new rig and got a new 1.000W PSU. The calculator says that i will need at least 852W. Worse because my actual PSU has 850W. Id the calculation is correct my system will work. :D
You could try and see what seasonic says.
 

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IMO should be fine, especially as it's a high quality PSU, not some bargain bin 650 W.
 
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650W is very marginal for 6800XT but you can lower the power limit a bit and not lose much performance at all.
 
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@Cvrk
650W for a 6800XT shoud be fine with your Seasonic power supply. I dont think you will have any issues.

My previous PSU was a Be quiet! Pure Power 10 CM 600W (Plus Silver) and it worked fine with a reference 6900XT :D
Although I switched after a month to a reference 6800XT Midnight Black which I still have.
 
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You should be fine OP, especially since you're pairing this with a 65W chip.
Transient spikes can be a legitimate factor, but you have a very solid PSU (given their track record it likely should be rated @ even higher wattage).
 
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You could try and see what seasonic says.
I did. But at Seasonic they do not care about my custom loop, fans, M.2 and Ram. Only to give you somke figures. In my new build there are
1 full custom water cooling loop with distroplate and 1 D5 Pump and a hell of LED.
12 Fans
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It might sound not that much but they draw a hell of power. ;)
 
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Why don't you buy the card first, test it on your PSU and see if there are issued(i don't think there will be) ? Then you buy a new PSU or return the 6800XT get a RTX 4070 :pimp:
 
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You'll be fine. Underclocking and undervolting is highly recommended for these cards anyway. Btw as I've read some nonsense replies, just to say that going from 5700XT to 6800XT will be a huge upgrade. Enjoy.
 
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I used a 6800 XT with a nominally 65W Ryzen 5600 (really 76W or 100W w/PBO) for months on a 550W Corsair PSU with no problems. OC memory, UV and UC 50-100MHz from stock and it runs negligibly different compared to out of the box except for using 220W max (GPU Chip reported in GPU-Z, board total is 10-12% higher). However it was also fine running continuous benchmarks at its 313W (reported) +20% power limit as well. I've now swapped PSUs for a EVGA G3 650 to better match components and continue to have no problems. YMMV of course.
 
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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
If your PSU was built before 2019/20 you're much more likely see issues in games but benches generally wont trip ocp. If it was built after that your gtg. Either way, you won't know until you try it.
 

AMF

Joined
Apr 28, 2021
Messages
667 (0.56/day)
Location
USA
System Name MR T System price 2280$
Processor Ryzen 9 3900x 325 $4.7Ghz boost pbo +50 +50 enhance - offset auto voltage -.1875 offset soc
Motherboard ROG STRIX X570-E Gaming 125 $ open box
Cooling 280mm ARCTIC FREEZER II idle temps 25c cpu 28c cpu diode 20c vrm 25c motherboard b stock 60$
Memory 2x 16GB Dual rank G Skill Trident Z Neo F4-3600C16-16GTZNC @3800 1.395v 16-19-16-20-38-58-1T $96
Video Card(s) Asrock RX 6950XT Oc formula Oc edition 705$ 2700 2800 boost 1090v 2376mhz mem 19GB/s
Storage 500 GB WD SN850 PCI-E 4.0x4 85$ pcie16x4
Display(s) V505-J09 Vizio 4k HDR 299$ oc 5hz
Case Cougar Panzer Max G Full Tower Tempered Glass 150$
Audio Device(s) TV junk ewww
Power Supply Seasonic SS-1250XM2 Bought in 2013 350$ 11 y/o hasnt lost any voltage or watts
Mouse Logitech ERGO Trackball 35$
Keyboard Corsair K57 50$
VR HMD Dont give a damn about vr
Software win 11 pro modded by me no ai no remote connections free hehe
Benchmark Scores 8188 multi 540 single cinebench r20
i have an 11 y/o psu on my nearly 2.8GHZ bost 6950xt no problems what so ever
 
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