"Sapphire Radeon HD 7850 review also featuring Sapphire Radeon HD 6870. Sapphire Radeon HD 7850 uses the Pitcairn GPU at 860Mhz and has 2GB GDDR5 memory running at 4800Mhz. Sapphire Radeon HD 7850 has a 256it Memory Interface, 1024 Shader Processors and DirectX 11.1. We will be benchmarking Sapphire Radeon HD 7850 to Sapphire Radeon HD 6870 using AVP, Battlefield 3, Crysis 2, Dirt 3, Hard Reset, Just Cause 2, Left for Dead 2 and Lost Planet 2."
"Sapphire Radeon HD 6870 has a new architecture with a total of 1120 stream processors and 56 texture units delivering massively parallel computing power for graphics and other accelerated applications. Its core clock speed of 900MHz, together with a dedicated high speed interface to 1GB of GDDR5 memory running at 1050MHz (4.2 Gb/s effective) delivers class leading performance. It boasts a very modest active power consumption and, using Dynamic Power Management, the card has a super low-power idle mode."