Sapphire Radeon HD 6670 1GB Graphics Card Review

Test System and Overclocking
Our test system very rarely changes, and there is reasoning behind this. The reason that our test system rarely changes is so that we can keep the continuity flowing which leads to our results being part of a fair test, especially when comparing to other components.

Our test machine comprises of:

Sapphire Radeon HD 6670 1Gb
AMD Phenom II X6 1100T
Asus Crosshair IV Formula
4Gb Kingston HyperX 1800MHz
2 x Kingston V+ Series 64Gb (RAID 0)
Thermaltake ToughPower 1200Watt
Windows 7 Professional 64-bit

Overclocking

The Sapphire HD6670 stock clock speeds have the GPU (Eclk) settings at 800MHz and the Memory (Mclk) clocked at 1000 MHz for a total combined effective memory clock of 4000MHz or 4Gbps.

The Sapphire HD6670 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 936 MHz for the GPU clock and 1283 Mhz for the Memory Clock, resulting in an effective memory clock of over 5Ghz, (5132 Mhz to be exact). This shows a total increase of 17% for the GPU clock and 28.30% for the Memory clock, which is a hefty increase to say the least.

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 individuals core performance.