- Dec 8, 2010
- 11,897
- 74
- 91
Hi, I need some help from experienced GPU overclockers. I've got a Sapphire 7950 Vapor-X OC with Boost.
I'm not entirely sure which program to trust. They differ on the VDDC but report everything else identically. I'm overclocking with Sapphire TriXX.
850MHz power limit 0
1030MHz power limit +17
As you can see, both programs report a change in VDDC when increasing power limit.
And another thing. I can't get the card long-term Heaven-stable beyond 1030MHz even at the highest power limit. It won't immediately crash until at around 1150MHz, and below that it will stay stable for some time, then show artifacts and finally crash if left running. But this suggests to me that with only a bit more voltage, I could get rid of the artifacting.
I'm wondering if there's anything I can do. I can't manually overvolt without forcing constant voltage which I don't want to do. The voltage is dictated by the power limit. Should I try a different BIOS? Like a 7970 Vapor-X or a different 7950?
I'm not sure if the card would handle more voltage despite the temperatures being fine. At 1030MHz, VRM1 reaches 85C and GPU stays below 60C at 50% fan speed after 2 hours of Heaven.
Other info:
GPU-Z shot
90.6% ASIC quality
TriXX v4.3.0
HWiNFO64 v4.06
TechPowerUp GPU-Z 0.6.6
I'm not entirely sure which program to trust. They differ on the VDDC but report everything else identically. I'm overclocking with Sapphire TriXX.
850MHz power limit 0

1030MHz power limit +17

As you can see, both programs report a change in VDDC when increasing power limit.
And another thing. I can't get the card long-term Heaven-stable beyond 1030MHz even at the highest power limit. It won't immediately crash until at around 1150MHz, and below that it will stay stable for some time, then show artifacts and finally crash if left running. But this suggests to me that with only a bit more voltage, I could get rid of the artifacting.
I'm wondering if there's anything I can do. I can't manually overvolt without forcing constant voltage which I don't want to do. The voltage is dictated by the power limit. Should I try a different BIOS? Like a 7970 Vapor-X or a different 7950?
I'm not sure if the card would handle more voltage despite the temperatures being fine. At 1030MHz, VRM1 reaches 85C and GPU stays below 60C at 50% fan speed after 2 hours of Heaven.
Other info:
GPU-Z shot
90.6% ASIC quality
TriXX v4.3.0
HWiNFO64 v4.06
TechPowerUp GPU-Z 0.6.6