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**ATI RADEON 7800 SERIES NOW AVAILABLE!!**

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Sapphire 7870 oc - First overclock attempt.
 
For reference, here is a 7850 with exactly the same 1150MHz/1450MHz clocks as the 7870 above. There seems to be about 8% difference at same clock speeds. My 2500K was at stock.

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MartynB85 said:
is the 7870 worth the extra you reckon? don't really like the cooler on the VTX 7850.
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Same boat as you and im having doubts after i read this in the other thread


555BUK said:
Before the ASUS GPU Tweak tool was available, 7850's could not overclock past 1050MHz (CCC & BIOS limits), but 7870's were allowed to go up to 1300 (if the GPU's could reach it). Now the 7850's can go just as high as the 7870's, meaning the 7870's no longer overclock better. The only performance difference between the cards is that the 7850 has 20% fewer shaders.

Like with the 6850 vs 6870 and 7950 vs 7970, shader counts alone do not majorly affect performance. Clock speeds, ROP's, Memory bandwisth etc mean that a few missing shaders make little real difference.

Many reviewa show a 7850 overclocked to 1050MHz equalling a stock 7870 @ 1000MHz. That mean clock for clock a 7870 is only very slightly faster.

Stock speeds
Stock 7870 = 1000/4800
Stock 7850 = 860/4800
difference = ~20%

before GPU Tweak allowed unlocking average overclocks
OC 7870 = ~1250/5600
OC 7850 = ~1050/5600
difference = ~25%

with GPU Tweak unlocked overclocks
OC 7870 = ~1250/5600
OC 7850 = ~1250/5600
difference = 6-8%

It is not that 7870 no longer overclocks better, it is more that 7850 now overclock just as well. The 7870 is not worth 40% more money for just 6-8% performance.
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kmax86 said:
I know too much variables that we could be waiting forever :D

Im guessing 670 / 660 will be around may or june
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it does already feel like i've been waiting forever :D

If the 7870's were a bit cheaper i'd grab one, i can see the 670/660's being quicker though. But i'm tired of waiting now :(

What do you think you will go for?
 
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