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HD 7950 Overclocking

shankly1985

shankly1985

shankly1985

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HD 7950 Overclocking The Memory vs Core

Right now am running 1005/[email protected] is it true, Overclocking the memory isn't really worth it on theses GPUs? Would I be better off OC the core more and dropping the Memory clock down towards stock?

Say I ran 1100/1250 vs 1005/1500 witch would you say give better performance?

Thanks
 
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No point running the memory less than 1500MHz, its easily capable of that and more, but you do get bigger gains increasing the core speed. Aim for 1100/1500 to begin with, but you might need a little more voltage.
 
psychodil said:
No point running the memory less than 1500MHz, its easily capable of that and more, but you do get bigger gains increasing the core speed. Aim for 1100/1500 to begin with, but you might need a little more voltage.
Click to expand...

Thanks might try upping the voltage to 1.1v and test and see how low I can drop it back down.
 
Well this is interesting When I bench Heaven @1005/1500 my GPU temps hit 70c I just ran bench again this time 1100/[email protected] and crashed stage 23 :( so I just checking GPU-z and my max temp is only 64c lol How is this possible with a high OC plus voltage?
 
I think you'll be able to do 1050/1575 on stock volts but try what i suggested first.. i have to use about 1.174v for 1150 which is perfectly fine. Good luck :)
 
MyBrains said:
I think you'll be able to do 1050/1575 on stock volts but try what i suggested first.. i have to use about 1.174v for 1150 which is perfectly fine. Good luck :)
Click to expand...

Did try couple months back 1005/1575 on stock voltage benches passed and games run good. But was getting driver crashes randomly so I increased the voltage to 1.043 from 1.031 since doing so never once had driver crash.
I'll test with your voltage tomorrow and post back my results :)

Thanks again
 
shankly1985 said:
Did try couple months back 1005/1575 on stock voltage benches passed and games run good. But was getting driver crashes randomly so I increased the voltage to 1.043 from 1.031 since doing so never once had driver crash.
I'll test with your voltage tomorrow and post back my results :)

Thanks again
Click to expand...

Hmm u might need to up the core volt a lil bit more then as i was thinking ur default volt was 1.043v. 1.125v is what i'd try with 1100 core but its worth tinkering with and upping volts slowly until u find a good stable setting that wont up the temps by much.. if at all.
 
Just been on an empty BF3 server testing @1.118v and didn't get any crash but I was only on for about 10mins, will test more tonight.
Max temp was 64c very happy with that seeing has temps was around 61c with other OC.
 
Am now stuck, Heaven crashed before even loading @1.118v so I increased up to 1.125v and it run but now and then I noticed artifacts and my Temps hit 74c this time.
So @1100/1500 @1.125v I still not stable lol should I just quite now and stay @1005/1500 stable.

Comparing my two benchmark scores 1770 is my best @ 1005/1500 FPS-70 and @1100/1500 I got 1878 FPS-74
For a big OC just extra 4 frames :eek: not had a chance to test games properly Because of crashing but am not sure if I will notice a really difference?

Thanks
 
There are a few artifacts in the heaven program anyway, I notice it even at stock. This is not a sign of instability.

I doubt you will be getting memory artifacts at those speeds, they are very obvious, like large pointy triangles. Core artifacts are like little white dots.

Try gaming at 1100mhz and see what your temps hit.
 
Thanks for reply, Yer heaven has the glitch when panning the dragon. But theses wasn't like that theses where what looked like white flashes for split second and only happened now and then. First time I ran bench @1.118 it ran sweet no glitch no crash, but early on it crashed and I upped voltage to 1.125 and it finished but with them white glitches. lol

Think I just try gaming @1.125 since I not had a crash yet at that voltage.

Thanks again
 
The core voltage with my HIS 7950 is set to 1.250V by default when under load (and it only boosts to 925Mhz with that voltage :rolleyes:) and it hovers around 0.900V when idle.

I'd say your voltage levels are pretty good compared to mine ;).
 
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