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7800 xt undervolt and oc question.

Clarence Boddicker

Clarence Boddicker

Clarence Boddicker

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18 Feb 2024
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I recently oc'd and undervolted my 7800 xt. I got the voltage down to 1055mV and memory to 2594MHz. Ive played about 20 or so hours of Ratchet and Clank a rift apart with the graphics at max settings with no crashes during gameplay.

I played for a couple of hours again tonight, again with no crash during gameplay, but the strange thing is that I got a black screen about 20 minutes after finishing playing. I was just looking at websites online when I got a black screen, I dont think the gpu was even in use?

When the pc restarted, adrenaline had reset the tuning back to default so I think that it must be the uv/oc that caused the crash.

Could this have been the tuning that caused the black screen and what should I adjust first, voltage or memory?
 
Clarence Boddicker said:
When the pc restarted, adrenaline had reset the tuning back to default so I think that it must be the uv/oc that caused the crash.

Could this have been the tuning that caused the black screen and what should I adjust first, voltage or memory?
Click to expand...
That doesn't mean much, the driver defaults your settings if you sneeze.
 
Clarence Boddicker said:
I recently oc'd and undervolted my 7800 xt. I got the voltage down to 1055mV and memory to 2594MHz. Ive played about 20 or so hours of Ratchet and Clank a rift apart with the graphics at max settings with no crashes during gameplay.

I played for a couple of hours again tonight, again with no crash during gameplay, but the strange thing is that I got a black screen about 20 minutes after finishing playing. I was just looking at websites online when I got a black screen, I dont think the gpu was even in use?

When the pc restarted, adrenaline had reset the tuning back to default so I think that it must be the uv/oc that caused the crash.

Could this have been the tuning that caused the black screen and what should I adjust first, voltage or memory?
Click to expand...
This happens to me randomly also. I’ve OC my core to 3200mhz max. Undervolted to 1013mv 15% power limit and 2614mhz vram fast timings. Games are fine but random browser crashes and hard reset of the PC. Probably is my overclock or it’s a driver issue.
 
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GhostDog1981 said:
This happens to me randomly also. I’ve OC my core to 3200mhz max. 1013mv 15% power limit and 2614mgz vram fast timings. Games are fine but random browser crashes.
Click to expand...

I think Ive got my core at 3200mhz max as well. I heard that these gpu’s are stable to about 950mV, I couldnt get mine anywhere near that though, it crashes at 1050mV. Have you tried disabling hardware acceleration on your browser?
 
Clarence Boddicker said:
I recently oc'd and undervolted my 7800 xt. I got the voltage down to 1055mV and memory to 2594MHz. Ive played about 20 or so hours of Ratchet and Clank a rift apart with the graphics at max settings with no crashes during gameplay.

I played for a couple of hours again tonight, again with no crash during gameplay, but the strange thing is that I got a black screen about 20 minutes after finishing playing. I was just looking at websites online when I got a black screen, I dont think the gpu was even in use?

When the pc restarted, adrenaline had reset the tuning back to default so I think that it must be the uv/oc that caused the crash.

Could this have been the tuning that caused the black screen and what should I adjust first, voltage or memory?
Click to expand...
The voltage might be too low, with these cards its an offset so the reported voltage will be lower than what you set. I run my card at 2575 & 1090mv & get similar performance to my nitro's boost profile with lower power. Also the memory & core voltage are shared iirc so pushing the memory is adding extra stress.
 
docsonic said:
The voltage might be too low, with these cards its an offset so the reported voltage will be lower than what you set. I run my card at 2575 & 1090mv & get similar performance to my nitro's boost profile with lower power. Also the memory & core voltage are shared iirc so pushing the memory is adding extra stress.
Click to expand...
What sort of Timespy scores are you getting with a stable game-ready undervolt/overclock?
 
docsonic said:
The voltage might be too low, with these cards its an offset so the reported voltage will be lower than what you set. I run my card at 2575 & 1090mv & get similar performance to my nitro's boost profile with lower power. Also the memory & core voltage are shared iirc so pushing the memory is adding extra stress.
Click to expand...
Ok cheers, Ill start with upping the voltage slightly and see if that works.
 
Well I upped the voltage slightly today to 1060mV, left the VRAM at 2594Mhz default memory timing and min frequency at 500Mhz, max at 3200Mhz.

Its fully stable in timespy and scored 21537. It was also stable while gaming. I did have another browser crash though so I disabled hardware acceleration as suggested and that seems to have solved the problem so far, fingers crossed.
 
Voltages too low.

I've always for Star Citizen to be the best instability sniffer, i can play almost any game with 3000 Mhz at 1030 mv and 2600 memory, 20 minutes of that in Star Citizen and.... crash or black screen.

I run it 1100 Mv at 3000 Mhz and don't touch the memory at all as that still causes problems in Star Citizen, with those settings i also don't get any weirdness at all, no browser crashing or anything like that, rock solid.

I think the drivers are pretty good at pushing through any instability in most games, but that doesn't mean its actually stable, if you're getting browser crashing i would suggest its just not stable, that shouldn't be happening, its easy to chalk it up to driver issues because it runs fine in your games, but its not stable, if it doesn't browser crash at at stock them your problem is the settings you're using.

Edit: what you can do is leave it stock and set your overclocks as per game profile.
 
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You know... You're able to under volt the GPU by 20% while at the same time push the clocks up 20% and those driver hold it together in most games, essentially you're pushing the GPU 40% beyond its design parameters, that's so far outside what's normal its commendable that the drivers are holding it together in most games, there is no way the GPU is running stable like that.

IMO this is an example where AMD's rock solid Drivers are misunderstood as "bad"
If i tried anything like that with my last Nvidia GPU the drivers would give up instantly, the fact that AMD drivers don't is the problem, it gives you a false sense of being ok, until its not...

Don't be silly with it and you'll not have any problems.
 
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Interesting... he's talking about overclocking the VRam here, somehow he seems perplexed that the VRam OC would work but while playing videos it might crash, sounds like a similar problem to you @Clarence Boddicker

Talking to Fabio, not that he will read this...
He does also talk about needing more core volts for a more stable VRam OC, this is why i don't understand his confutation, is he not able to put 2 and 2 together?

Again what i found it might be stable for 2 hours in game... and then crash, if you're just testing the game for 10 minutes then the problem with the OC is probably not going to show up, if its not stable while playing videos then make that an additional stress test, if it fails up the voltage 10 or 15 mv.

its not rocket science :)

youtu.be

How to Overclock & Undervolt RX 7900GRE | ADRENALIN 2024 Easy Tutorial

Get 30% discount with my "SKAG" code!Windows 11 Pro ($22): https://www.gvgmall.com/gvg/SKAG1Windows 10 Pro ($15): https://www.gvgmall.com/gvg/SKAGWindows 10 ...
youtu.be youtu.be
 
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humbug said:
Interesting... he's talking about overclocking the VRam here, somehow he seems perplexed that the VRam OC would work but while playing videos it might crash, sounds like a similar problem to you @Clarence Boddicker
Click to expand...

Yes it sounds just like the problem I had. Its kind of strange how it can be game stable but just watching a video can make it black screen.

Ive had the voltage at 1070mV and VRAM at 2564 for about five days now with no in game or browser crashes, hopefully thats it fully stable now.
 
Ok, i had been running Vram 2588 for a couple of days, yesterday i turned it up to 2600, no issues in any game.

Then i watched Gamers Nexus on Youtube, suddenly the screen went black, the sound was still playing but garbled and intermittent, it did that for about 30 seconds and then the PC rebooted its self, it loaded back in to Windows no problem, once the driver loaded, it took a little longer than usual, i got a message that the performance settings had been reset due to instability.

So i think 2588 is where the limit is for my card, i'm quite happy with that :)
 
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