Sapphire Radeon HD 6770 fleX 1GB Graphics Card Review

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.