Driver has stopped working after a slight overclock on an HD 7950

Mikoloco · Jan 16, 2015

So, I very carefully upped the clocks from 880 to 1000 Mhz and it seemed to be pretty stable on 1 Ghz
I ran all games fine, but when I started up watch_dogs with this overclock it crashed 1 min in the game with the driver issues, I had to restart the pc and reset the clocks for it to work.
What exactly happened here??

damric · Jan 16, 2015

The overclock is unstable. Try bumping GPU voltage a bit and try again.

Mikoloco · Jan 16, 2015

damric :

Are you completely sure?
because the HD 7950s apparently have a guaranteed OC of at least 1 Ghz on stock volts, and I don't really want to mess with this stuff that much considering my PSU is only a 650 Watts LC Power

getochkn · Jan 16, 2015

that is not a mild OC. Try going in small steps. Even ASUS 7950's are only oc'd to 900. You went way to high.

Mikoloco · Jan 16, 2015

getochkn :

a 120 Mhz OC isn't all that much compared to much of what I've seen here really

getochkn · Jan 16, 2015

Mikoloco :

Where do you see that 7950's have a guarenteed overclock? No card has that really. Stock is 800. You are already oc'd 80mhz at 880.

Mikoloco · Jan 16, 2015

getochkn :

Mikoloco :

Where do you see that 7950's have a guarenteed overclock? No card has that really. Stock is 800. You are already oc'd 80mhz at 880.

Yes but that 80 Mhz came from factory
Also, why did the OC initially work with the games but on the second time around crashed?

damric · Jan 16, 2015

Tell me about your power supply.

getochkn · Jan 16, 2015

Mikoloco :

Because watch dogs maybe pushed it further than the other games did, or in a way the other games didn't. Either way, going from 880 to 1000 is not a good idea. It's way too high. Considering your card is reference at 800, factory overclocked to 880, it probably do much better without watercooling, good vrm cooling, and maybe, then maybe, you can hit a 1000. Did you monitor any temps during this, or just crank the slider on the overclock software to max and see what happened. That's not the way to overclock. It's a tedious process of going 10-20mhz at a time, intense testing for stress and heat, and repeating until you get a crash but good temps still, then try uping voltage and going again. Be happy with the 880 and the the fact that it's already 10% oc'd.

Mikoloco · Jan 16, 2015

damric :

It's an LC Power 650 Watts

Mikoloco · Jan 16, 2015

getochkn :

Mikoloco :

Because watch dogs maybe pushed it further than the other games did, or in a way the other games didn't. Either way, going from 880 to 1000 is not a good idea. It's way too high. Considering your card is reference at 800, factory overclocked to 880, it probably do much better without watercooling, good vrm cooling, and maybe, then maybe, you can hit a 1000. Did you monitor any temps during this, or just crank the slider on the overclock software to max and see what happened. That's not the way to overclock. It's a tedious process of going 10-20mhz at a time, intense testing for stress and heat, and repeating until you get a crash but good temps still, then try uping voltage and going again. Be happy with the 880 and the the fact that it's already 10% oc'd.

I slowly pushed it from the 880 to 1000 Mhz, using AC IV as test.
I understand that but the problem is that I also had run Watch Dogs overclocked to 1 Ghz

damric · Jan 16, 2015

Mikoloco :

Don't overclock with that.

Mikoloco · Jan 16, 2015

damric :

Good point, it seems to be weak even for the stock HD 7950 considering the fact that the whole computer crashes if I put textures on ultra in watch_dogs
Do you have any recommendation for a PSU (max 60€) able to at the very least provide me with a bit of room for a little overclock?

damric · Jan 16, 2015

Mikoloco :

damric :

Good point, it seems to be weak even for the stock HD 7950 considering the fact that the whole computer crashes if I put textures on ultra in watch_dogs
Do you have any recommendation for a PSU (max 60€) able to at the very least provide me with a bit of room for a little overclock?

Anything from tier 2A or 1.

getochkn · Jan 16, 2015

Did you check temps and log them to see what temp the card and vrm's hit when watch dog crashed. I doubt a better PSU is going to magically make this 20% oc happen.

damric · Jan 16, 2015

getochkn :

Poor ripple filtering can ruin overclocks much more than 20%.

Mikoloco · Jan 16, 2015

getochkn :

Temps were at 55c vram was at around 2555 mb usage

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Driver has stopped working after a slight overclock on an HD 7950

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