Stefan Mileschin

AMD just launched the Radeon HD 7800 series graphics cards, consisting of two models, the Radeon HD 7870, and the Radeon HD 7850, targeting crucial price-points that appeal PC gamers. The two models are based on new 28 nm silicon by AMD, codenamed "Pitcairn," which packs 2.8 billion transistors. The new chip takes advantage of AMD's Graphics CoreNext architecture.

The Radeon HD 7870 packs 1280 GCN stream processors, 80 texture memory units (TMUs), 32 raster operations units, and a 256-bit wide GDDR5 memory interface, holding 2 GB of memory. This card is AMD's second "GHz Edition" model (after the Radeon HD 7770), sporting a core clock speed of 1 GHz. The memory is clocked at 1200 MHz (4.80 GHz GDDR5 effective).

http://www.techpowerup.com/161710/AM...00-Series.html