AMD has now offically launched its latest Radeon HD 7800 series based on the 28nm Graphics CoreNext architecture Pitcairn GPU. The new Radeon HD 7800 series consists of two models, the Radeon HD 7850 and the Radeon HD 7870.

As far the specs are concerned, the Radeon HD 7870 packs 1280 GCN stream processors, has 80 TMUs and 32 ROPs, and 2GB of GDDR5 memory paired up with a 256-bit memory interface. AMD decided to name this one GHz Edition, same as we saw on the Radeon HD 7770, as this is the second card that feature 1GHz GPU clock. The 2GB of GDDR5 memory is clocked at 1200MHz (4.8GHz effective).

The slower, Radeon HD 7850, packs 1024 stream processors, has 64 TMUs and same amount of ROPs. Same as the Radeon HD 7870, this one also packs 2GB of GDDR5 memory paired up with a 256-bit memory interface. The Radeon HD 7850 works at 860MHz for the GPU and 1200MHz (4.8GHz effective) for memory .

The reference designed cards are priced at US $349 for the Radeon HD 7870 and US $249 for the slower Radeon HD 7850. The new cards are expected to appear in retail/e-tail sometimes during this month.