Overclocking Questions

[Kayn]

So I've finally decided to try and overclock my GPU and see how far I can take it without touching any of the power settings. My Card is an MSI Radeon HD 7950 Twin Frozr III. As of now I have successfully overclocked it to 1000/1290 from 960/1250 without touch any of the stock voltage settings. I ran Kombustor's furry doughnut for 40 minutes and there were no problems, no crashes and no artifacts so I think its stable. What do you people of the forum do when you make sure an overclock is stable?

[Bad2049]

My card is in my sig with clock speeds. As for testing my OC for stability.. I run any and every benchmark I can get my hands on starting with synthetics and then going to my in-game benchmarks. That's just the way I do it and I'm sure others have far better methods than my own.

[Wats]

Fuzzy doughnut is the worst stability test by far. Youtube videos will crash faster if the card isn't stable.

 

 

Go for all the core speed you can and test for stability with the games you play.

[Kayn]

Fuzzy doughnut is the worst stability test by far. Youtube videos will crash faster if the card isn't stable.

 

 

Go for all the core speed you can and test for stability with the games you play.

I've never heard that before. Thats really interesting.

[Wats]

Ive heard it before. I've tested it before.

 

 

Fuzzy Doughnut is only good for finding max temps.

 

 

For Core clock stability, just test all of your games! Random benchmarks are good too.

 

For Vram stability, test with Catzilla. I've used it on multiple video cards for the memory overclocking, artifacts almost instantly if there is instability. Heaven and Valley will too but it takes a little bit longer...

[A10-FTW]

just a tip, before start the gpu OC, throw a Prime95 to make sure that "your actual CPU" is stable

 

is old school, but for me... is the king  B)

 

step two - start the gpu OC

[mvitkun]

I'd recommend running stuff like

Unigine Valley

Unigine Heaven

Unreal Engine 3

3DMark (11 or the new one)

games like

Crysis 3 (DX11)

Metro 2033 

Metro last light

Battlefield 3

 

just run a variety of games and benchmarks,the larger the variety the more likely that your benchmark is stable.

 

ANY artifacts means its an unstable overclock.

Display driver crashed means its an unstable overclock.

Lower fps or lower scores than on lower clocks means its unstable or that you've hit the max of what your card can do.

-at that point you can try to raise the memory clocks or raise the voltage.

 

the "Fuzzy Doughnut" test CAN catch artifacts,but don't expect it to.

use it more to see if your heatsink can handle the voltage your pumping through it.