Overclocking
The Sapphire HD6770 stock clock speeds have the GPU (Eclk) settings at 850MHz and the Memory (Mclk) clocked at 1200 MHz for a total combined effective memory clock of 4800MHz or 4.8Gbps.
The Sapphire HD6770 was ran to find the maximum overclock we could achieve by incrementing the clock speeds by 10MHz at a time, relying on GPU-Z for clarification of the speeds and Furmark to test stability.
We were able to obtain stable overclocks of 930 MHz for the GPU clock and 1355 Mhz for the Memory Clock, resulting in an effective memory clock of over 5.4Ghz, (5420 Mhz to be exact). This shows a total increase of 9.41% for the GPU clock and 12.92% for the Memory clock, which is nice little boost considering the price tag of this card.
Keep in mind overclocking is more of a guideline as to what the card can achieve, actual results can and will vary based on an individual core performance.
Great review! I'd like to add this one to the pros: *Solid, and great looking graphics card*
Nice review and I have a n HD 5770 @ 920/1350 it idles in the low 40 s but a nice review to get an idea about this card. I suppose the 6770 is the HD 5770 ? and should perform pretty good for the price .Thanks
good review :)!bit of a steep price with 5770's ~£70 now tho