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

[Chrispy_]

Just one more note: the review on HWbusters.com states that the 700W PSU recommendation is based on a PC configured with a Ryzen 9 7950X.
That CPU can be way more power hungry than my i5-13600K.
Blender multi-threaded: 187W vs 235W. While after undervolting mine is running CB R23 MT at 140-145W as per HWiNFO64.
So that should shave off quite a bit from that 700W recommendation.

I guess I'll just go for it and see what it gives. If I do see unusual crashes or OCP is getting tripped, I can then still look for a higher wattage PSU.

If you're running Blender, you can't game at the same time though, so your GPU will be idle. Yes, you can set process affinity and limit Blender to only some of your cores, allowing you to game on the other cores, but it's still a horrible experience because the CPU won't boost appropriately for gaming like that, and Blender will fight with the game for cache, memory allocation, bandwidth etc.

To the best of my knowledge, V-Ray is the only renderer that tried hybrid GPU+CPU renders and nobody uses the hybrid mode that I'm aware of - it hasn't gained commercial success and the last time our visualisation department assessed it, it was a total disaster.

 

[Freeco]

If you're running Blender, you can't game at the same time though, so your GPU will be idle. Yes, you can set process affinity and limit Blender to only some of your cores, allowing you to game on the other cores, but it's still a horrible experience because the CPU won't boost appropriately for gaming like that, and Blender will fight with the game for cache, memory allocation, bandwidth etc.

To the best of my knowledge, V-Ray is the only renderer that tried hybrid GPU+CPU renders and nobody uses the hybrid mode that I'm aware of - it hasn't gained commercial success and the last time our visualisation department assessed it, it was a total disaster.

I'm not rendering. I just used that link to the blender power consumption as an indication of difference of power demand between the 2 CPUs.
As a hardware enthusiast I build a new desktop PC about every 3 years. This time I choose a i5-13600K which was a nice upgrade from my R5 3600. It's not that I really needed a new desktop, just that I wanted to I prefer to build value-oriented frequently over high-end occasionally. And my wife then inherits my 'old stuff', and I reuse my 'even older stuff' for something else like an HTPC or so It's a hobby like any other I guess

 

[Beginner Micro Device]

RX 6700 XT is rated 230 W.
I touched a couple sliders and I now never exceed 125 W (only 5% performance lost).

I don't see why you can't do the same with the overvolted out of the box 7800 XT. These GPUs are great overclockers, yet they must be great undervolters as well (alas I still couldn't find an appropriate undervolting article/video).

Dropping your mean wattage to something below 185 W will ensure you are safe and sound. This will also improve your acoustic comfort level. Win-win.

 

[Chippendale]

RX 6700 XT is rated 230 W.
I touched a couple sliders and I now never exceed 125 W (only 5% performance lost).

I don't see why you can't do the same with the overvolted out of the box 7800 XT. These GPUs are great overclockers, yet they must be great undervolters as well (alas I still couldn't find an appropriate undervolting article/video).

Dropping your mean wattage to something below 185 W will ensure you are safe and sound. This will also improve your acoustic comfort level. Win-win.

the acoustic sound level surprisingly was already very low i read, nvidia can only ruin this gamers dream by coming quicker with a generous 5000 serious somewhere next year around this time

Basically, it's the same situation. But could you fill out your full system specs in the TPU profile?

check your wish

 

[Beginner Micro Device]

the acoustic sound level surprisingly was already very low

Less noise is still less noise. And you forgot about other PC parts. Heat from the GPU leads to other components, mostly CPU and m.2 SSDs, to heat more and thus require more serious cooling approach. Undervolting makes this problem less significant, making the PC cooler and quieter.

 

[Chippendale]

I did not at all forget about other pc parts as the acoustic sound level is one of the lowest out there that is why its special to mention....
I do understand that sticking in a box more tdp will matter

 

[AleXXX666]

When I built my new desktop last year I didn't foresee I would end up adding a +265W TGP GPU later down the road. Last year I wasn't gaming at all, so though the iGPU would do fine, or maybe a entry level GPU... Currently I 'only' have a Fractal Design Ion+2 Platinum 560W. I've started some occasional race games lately though (half an hour here, an hour there... just a few hours a week...), so want something a bit more powerful.
AMD recommends a 700W PSU for the RX 7800 XT, so my PSU is well below that.
However, when I add up the power consumption of my other components (stock i5-13600K, motherboard, 2 DIMMS, 8 fans, 2 NVMe drives) I estimate those consume about 200W when maxed out. Considering another 348W for 20ms power spikes of e.g. the Powercolor Hellhound, that's still within the capacity of my PSU. And in practice I don't expect to max out everything all at once...

I know PSUs are most efficient at 50% load. But if I don't necessarily have to spend €100-150 for a new 700W PSU on top of the €550-600 for the new GPU, I'd rather keep my current PSU.
So... "Okay..." or "No way!!"?

look here - TPU DB:
Suggested PSU600 W

So, if you have 80+ Gold or better PSU with 12V offering like ~540W + you are OK.

While you should be able to run the 7800XT with your current PSU -- especially when power limiting the CPU and gaming at 60 fps -- I would advise against it. The 13600K consumes about 200 W when fully loaded, and the 7800XT could spike as high as 320-360 W:

View attachment 312500View attachment 312502

This already brings us to the limit of your power supply, and does not account for the rest of the system (50 W at least). Sure, you're unlikely to see both the CPU and GPU pegged at the same time, and your high quality power supply can deliver more wattage than it's rated for. But IMO you should size the PSU up for the worst case scenario, plus a little headroom, and not for typical/casual use.

I'd upgrade to a quality 650 W unit at the very least. A bigger power supply will also operate at lower temperatures and noise levels, prolonging its life.

BTW, I'm the last person to recommend oversized PSUs. I ran my current setup for months on a 650W Seasonic Focus GX, against AMD's 800W minimum recommendation. I tested 20+ games with uncapped framerate at the time and didn't see a single issue.

EDIT:
Occasional spikes on the 7800XT can actually go much higher, if only very briefly:

View attachment 312534
View attachment 312535

UV it, LMFAO, at least with PL in MSI AB.... that's stupidly insane power consumption for nothing!

 

[Lew Zealand]

FWIW, I used my 6800 XT for a few months with a 550W PSU, a newer but not top quality one. Never had a problem, using it with a R5 5600 on PBO (100W max), though you'll never see that in-game. I tested it a bunch at its max 312W (GPU Chip reported, so actual about 10-15% higher) and never tripped the OCP.

However I then proceeded to do what @Beginner Micro Device said, I undervolted and slightly underclocked it to where it rarely if ever exceeded 200W and with a memory overclock, the performance was within 1-2% of stock. You'll be fine if you choose to do this and you can unlock a bit more performance when you opt for a better PSU: I swapped in a 650W and now run at max performance when needed though still prefer to run it down in its efficiency zone, like all my GPUs.

 

[NixonP]

You saying a gold PSU loses it's Gold status at 90% while I don't not believe you, that is ahuge cliam, and destroys the concept of Gold+ psus. I'd think they would have been caught long ago. I've had unrated 1800wChinese psus that lost thier rating at 1200w gold rating(mining( but they werern't rated.

 

[Taraquin]

Like others say, UV your GPU, it will probably run fine stock also, but on RDNA3 you can get better performance and lower consumption by UV.

 

[Oconner]

Here I have the same question as the topic, the difference is that my power supply is an MSI MAG A650BN, ATX, 650W, 80+ Bronze that I just bought, can I push an RX 7800 XT without weighing it down?

My Setup:
i5-12400f + (RX 7800 XT)

 

[Beginner Micro Device]

Here I have the same doubt as my colleague, the difference is that my power supply is an MSI MAG A650BN, ATX, 650W, 80+ Bronze that I just bought, can I push an RX 7800 XT without weighing it down?

My Setup:
i5-12400f + (RX 7800 XT)

View attachment 312982

Yes.

Just undervolt this GPU and you're all good.

In AMD Adrenaline, you need to modify just two sliders for that. Max clock should be lowered by ~50 MHz and then you step by step (20 mV, or 0.02 V each time) lower the voltage slider. Run your most demanding games every time you decrease the voltage. At some point you will notice BSODs, crashes, or other symptoms of your GPU being unstable. Increase the voltage back to the last stable configuration and add 10 mV.

After that you might opt for VRAM overclocking. It usually handles 2580-2630 MHz, yet your experience may vary.

Lastly, you might want to modify your cooler behaviour if you think it's too loud or too hot (anything below 85C in hot spot, VRM and VRAM temperatures is safe).

 

[Oconner]

Yes.

Just undervolt this GPU and you're all good.

In AMD Adrenaline, you need to modify just two sliders for that. Max clock should be lowered by ~50 MHz and then you step by step (20 mV, or 0.02 V each time) lower the voltage slider. Run your most demanding games every time you decrease the voltage. At some point you will notice BSODs, crashes, or other symptoms of your GPU being unstable. Increase the voltage back to the last stable configuration and add 10 mV.

After that you might opt for VRAM overclocking. It usually handles 2580-2630 MHz, yet your experience may vary.

Lastly, you might want to modify your cooler behaviour if you think it's too loud or too hot (anything below 85C in hot spot, VRM and VRAM temperatures is safe).

Thank you for your tips

 

[Frick]

Yes.

Just undervolt this GPU and you're all good.

In AMD Adrenaline, you need to modify just two sliders for that. Max clock should be lowered by ~50 MHz and then you step by step (20 mV, or 0.02 V each time) lower the voltage slider. Run your most demanding games every time you decrease the voltage. At some point you will notice BSODs, crashes, or other symptoms of your GPU being unstable. Increase the voltage back to the last stable configuration and add 10 mV.

The easier way is to use the Max frequency and Voltage % bars. I've gotten my 6950xt down to something like 220W in Starfield, with essentially no performance loss (in Starfield, I haven't tested other games really).

Also I would REALLY recommend against modding the cooler for a brand new GPU.

 

[Beginner Micro Device]

Also I would REALLY recommend against modding the cooler for a brand new GPU.

I did mean fan settings in Adrenaline, not physical modifications. Physical mods are for those who really know what they are doing not a single doubt.

Thank you for your tips

De nada.

 

[Frick]

Also these changes can be done with the game open. Alt-tab out, apply settings, go back and see if stable. Hyper easy.

I did mean fan settings in Adrenaline, not physical modifications. Physical mods are for those who really know what they are doing not a single doubt.

Ah ok. Good.

 

[Beginner Micro Device]

Also these changes can be done with the game open. Alt-tab out, apply settings, go back and see if stable. Hyper easy.

Yes but no. You need multiple game testing. Say, you can run 999 mV in GTA but Cyberpunk is only stable starting with 1050 mV. That's why I used the plural.

 

[Frick]

Yes but no. You need multiple game testing. Say, you can run 999 mV in GTA but Cyberpunk is only stable starting with 1050 mV. That's why I used the plural.

Sure, but you'll figure that out as you go along.

 

[Deleted member 232534]

IMO no problem,

you could run it at 450watt psu ez

 

[Oconner]

IMO no problem,

you could run it at 450watt psu ez

View attachment 312990

So let's go
Let's take the example of the RX 7800 XT with the highest consumption shown, Power Color

So in my situation we have:
Core i5-12400f 117w
RX 7800 XT 374w

117 + 374 = 491w

My source 650w / 80(%)+ bronze =520w (is the logic correct)?

In theory there would still be a margin of 29w for:
Keyboard and Mouse with rgb, Fans, SSDs, HDs, RAM
Is this the way of thinking?

 

[Beginner Micro Device]

So let's go
Let's take the example of the RX 7800 XT with the highest consumption shown, Power Color

So in my situation we have:
Core i5-12400f 117w
RX 7800 XT 374w

117 + 374 = 491w

My source 650w / 80(%)+ bronze =520w (is the logic correct)?

In theory there would still be a margin of 29w for:
Keyboard and Mouse with rgb, Fans, SSDs, HDs, RAM
Is this the way of thinking?

374 W is the consumption of the whole PC. The GPU itself consumes ~250 W.

 

[Oconner]

374 W is the consumption of the whole PC. The GPU itself consumes ~250 W.

Wow So now I feel even calmer

 

[Cvrk]

I don't wanna botter the OP but I also have a question, since we are talking about he 7800 XT.
I have a Seasonic prime TX-650. DO you guys think it can handle this card?

 

[Shou Miko]

I don't wanna botter the OP but I also have a question, since we are talking about he 7800 XT.
I have a Seasonic prime TX-650. DO you guys think it can handle this card?

As @Beginner Micro Device said if you undervolt you are fine, plus the Seasonic's prime series is a good unit but don't punch it too hard to the edge.

 

[3x0]

Even if you don't undervolt you are fine.