Help Overclocking a 6950 2gb

[Moodle]

Hey guys, I was unfortunate enough to have a card that does not unlock at all but I wondered could you give me some help at OC it? Whats the best way to do it and what settings tend to be the best for the card. Using ATI overdrive you can increase power usage by 20% to get better clocks, is that safe ? Thanks.

 

[Cleeecooo]

Use MSI afterburner

 

[Moodle]

Ok will do. What are good speeds to aim for

 

[Freddie1980]

Ok will do. What are good speeds to aim for

6970 stock speeds is a good place to start, don't worry to much about the shaders they alone don't really offer that much better performance but a 6950 at 6970 clocks will give pretty much the same performance.

 

[Jay794]

Or use Cataylst Control Centre, both work well

 

[Howling]

don't worry to much about the shaders they alone don't really offer that much better performance but a 6950 at 6970 clocks will give pretty much the same performance.

Have to disagree a little there. I did a bunch of bench tests with my 6950 @ stock and 6950 with shaders unlocked and there was a nice difference. Infact, I'll see if I can figure out which tests they were so I can link you..

Stock clocks, Stock FW; http://3dmark.com/3dmv/3555936 (P20468 3DMarks)
Stock clocks, +Shaders; http://3dmark.com/3dmv/3555976 (P21215 3DMarks)
CPU OC, GPU +Shaders; http://3dmark.com/3dmv/3556097 (P22630 3DMarks)
CPU+GPU OC, +Shaders; http://3dmark.com/3dmv/3556163 (P23403 3DMarks)

+800 3dmarks for shaders, +1400 for cpu OC, +800 for GPU OC.
Granted, I can only get 900mhz stable gpu clock, which is a fair OC but I've seen them pushed much higher.

 

[pgi947]

Just clocked my 6950's to 840/1325 in afterburner, rock solid and temps rarely hit over 80c. What's the stock 6970 clocks? As 840/1325 was the most afterburner would allow me.

 

[tommybhoy]

You need to change the MSIAfterburner.cfg file to include:

[ATIADLHAL]
EnableUnofficialOverclocking = 1
UnofficialOverclockingEULA = I confirm that I am aware of unofficial overclocking limitations and fully understand that MSI will not provide me any support on it
UnofficialOverclockingMode = 1
AccessibilityCheckingPeriod = 0
UnifiedMemoryUsageMonitoring = 1

Stock 6970 clocks are 880MHz/1350MHz

Try leaving your memory clocks under 1300Mhz or even stock and then start bumping the core up, you'll probably achieve a higher core with lower memory timings: