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So I have a non-ref. sapphire 6950 2GB stock is 800/1250 @1.1V

Its started to get unstable at +900 @ 1.1V in GTA4


Running furmark 1.9.0, with the dragon, at 1080p with postFX and 8x AA and full screen, and using 100% fan

990/1500 at 1.351V crashed in about 10min, I could turn up the volts, GTA4 artifacts too much with just the volts alone.

985/1500 @ 1.337V ran for 40min, then I stopped it. Avg was 48FPS, Temps steady at about 83-84C.

And GPUZ 0.5.2 was interfering with furmark, so I turned it off.

Here's some of the 1080p preset benches

800/1250 with avg 40FPS



990/1250 with avg 44 FPS



990/1500 with avg 46FPS



1000 MHz doesn't seem to want to work, even at 1.4V
The VRAM can definitely go higher, haven't tried yet.



With the volts ~1.3 and up, furmark artifacts for 1/2 to 2 seconds at the begining, and then looks perfect(even up until it freezes/crashes). The max load I saw was 193 Watts, so about 140Amps at 1.4V.

In GTA4 however, artifacting starts ~1.3V, and I've never seen GTA 4 or Crysis W draw over 90Amps.

And when I game at 990/1500 1.312V in GTA4, the artifacting takes maybe 3min to completely disappear.

The voltage artifacts are like static, stars , + signs, dots.....

The memory artifacts are much much less, and are line type things.

When alt-tabbing in/out to change OC setting, artifacting returns/gets worse...


Crysis always needs just a bit more juice to prevent a crash,

So today for 990/1500 I ran ~1.331V

And the only real artifacting I've noticiced in that is in the 1st snow level, along the very top of the screen there are some blue/white square type things flashing in and out....
Car replacement
(13 items)
 
  
CPUMotherboardGraphicsRAM
pII x4 40 @ 3.72GHz NB @ 2.79GHz M4A89gtd PRO/USB3 Sapphire 6950 2GB nonRef 950/1520 @1.2V 4GB Gskill DDR3 CL7eco @1656 6-8-6-20-24-1T 
Hard DriveOSMonitorPower
WD Black 640GB SATA3 Windows 7 Ultimate BenQ 24" G2420HD 1920x1080 SeaSonic M12II 520W 
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TV stand on wheels + cardboard door 
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Car replacement
(13 items)
 
  
CPUMotherboardGraphicsRAM
pII x4 40 @ 3.72GHz NB @ 2.79GHz M4A89gtd PRO/USB3 Sapphire 6950 2GB nonRef 950/1520 @1.2V 4GB Gskill DDR3 CL7eco @1656 6-8-6-20-24-1T 
Hard DriveOSMonitorPower
WD Black 640GB SATA3 Windows 7 Ultimate BenQ 24" G2420HD 1920x1080 SeaSonic M12II 520W 
Case
TV stand on wheels + cardboard door 
  hide details  
Reply