Originally Posted by Th3Gatekeep3r
I just grabbed P8454 on my setup in sig rig -- I am overclocking the 6870's still. I am on stock volts still and running 1040mhz core and 1200mhz memory. respectable for my system?
Great score for 2 6870s. You're owning single overclocked 580s with that OC of yours
It's typically a pain to OC 2 cards that high and keep them stable. Are they stable throughout your game collection or just stable enough to run 3dmark11? I've noticed 3dmark11 is much more forgiving for overclocks than Vantage or other games for example. I can OC to hell and back for 3dmark11, but with 3dmark vantage, or battlefield, etc... no way.
I get about 13.8K 3dmark11 P-score with Tri-fire 6970s @ 950/1375. I think I might throw in my 4th 6970 to try it out, once I add another PSU into the mix.
What's odd is I get a nearly 18K GPU score with the 3 6970s, but my 3dmark11 main P score is merely 13.8K.
Also, one thing I'd watch with the 6870s is microstutter. Check out the Tom's Hardware article on it. It shows that 2 6870s have significant microstutter. For some reason, crossfiring lower end AMD GPUs causes micro-stutter, but higher end cards such as 6950 and up, don't have it nearly as much. Nvidia suffers with it as well, but only when you try and SLI cards on the super budget end, such as SLI'd 550TIs, or 560s.
To fix the stutter however, you can just replace one of your 6870s with a 6870X2, as 3+ cards in crossfire tend to absolutely eliminate the microstutter.Edited by m3t4lh34d - 12/17/11 at 6:42am