Radeon HD 7870 and 7850: Pitcairn is the new performance-mainstream GPU

As you've already guessed, AMD's graphics division wasn't going to sit idly with just its flagship Radeons (HD 7970/HD 7950) being released. In order to capture the whole market one needs cater a full range of products. That's exactly what AMD has done this time around with a flurry of new product launches. First out was the Cape Verde based Radeon HD 7770, followed by HD 7750. These two GPUs are targeted toward the mid range-performance segment with a focus on power and thermal efficiency. Reviews have already shown that Cape-Verde based GPUs are, while built on the same efficient and powerful GCN (Graphics Core Next) architecture, not a direct successor to the existing Radeon HD 6870/6850 line-up. Mainly in terms of shader performance and memory bandwidth as the Cape-Verde design only gets 10 GCN CUs (Computing Units) which equates to 640 SPs (Stream Processors) and a 128-bit memory interface. So it was clear that AMD needs to address the apparent performance gap between its flagship Tahiti based GPUs (HD 79xx) and Cape Verde (HD 77xx) based ones. So enters Pitcairn with 1280 SPs and a 256 bit wide memory bus- to claim the performance-mainstream crown. We'll try to analyze how this new GPU from AMD fares in its endeavor.