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Already got CF 6950, thinking of replacing with 6970s

icehot666

icehot666

icehot666

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12 Feb 2007
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As the title, got the 2gb sapphire dirt 3 edition 6950s in crossfire.... just feel crysis 2 with dx 11 and high textures could be better, some of the outdoor scenes drop to low 40s fps... playing at 1920x1200.. Apparently these cards don't unlock, and overclocking has yielded crashes for any clocks actually worth while.... So thinking of swapping them out for 6970s instead!
 
i dont think such small performance jump is worth it 10 ~ 15% try overcloking the cards maybe

edit : oh they dont overclock weird .
 
Are you sure it's the 6950's that are the problem, besides the Crysis issue have you benchmarked and checked other 6950 results.
They could be bottle necked by other things like the CPU, 6950's crossfired is some awesome GPU power I would be looking elsewhere for the problem.
 
For all we know the next gen's could be Bug ridden in which case we would have no choice but to wait till the next gen where the bugs are fixed. Who knows what kinda strange and weird faults/bugs could happen with the new 28nm chips!
 
Well I have sandybridge i7 2600k overclocked atm to 4.1GHz with 8Gb ram 1600... though I am getting the gist that this isn't really worth it as I won't see much of an increase....
 
The majority of performance difference between 6950 and 6970 is from the clock speed increase. (Amdahl's Law explains why unlocking only gives you less than 3% performance increase.)

Have you tried to bump the voltage while you overclock them? Or is it the case where Sapphire still castrate the voltage chip to cut cost?

You'll only see a big boost in Crysis 2 by the following 2 methods:

1) Wait for the 28nm cards (recommended)
2) Switch to nVidia flagship cards (with at least 1.5GB vram per GPU; 3GB recommended)
 
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what's eulps exactly?? I'm starting to think the reason I couldn't overclock is down to low volts, the trixx software whilst good is limiting me to 1.18v tops...

harmony, thanks for pointing me to that law, that makes sense, I think I will wait now for 28nm and for now just play with overclocking to see what that gives me, if I can get around this voltage problem... The cooler on these cards are way better than stock so temp wise I shouldn't be having any problems...
 
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