AMD would be launching its HD7800 Series of graphics processing units featuring the 28nm GCN Core Architecture in Early March - Codenamed Pitcairn, The series would consist of the HD7870 (Pitcairn XT) and HD7850 (Pitcairn Pro).

Specifications of both cards have been leaked which match the specs we reported a while back here. So what's new in the HD7800 Series? A 28nm core powered by the GCN Pitcairn GPU used on two models, The Pitcairn XT which features1408 stream processors, 88 texture units and 24 ROP's, A 2GB GDDR5 memory (256-bit). The Core clock is maintained at 950Mhz and 5500Mhz for the memory. The HD7870 would retail for $299.

AMD Radeon HD 7870

1408 Stream ProcessorsCode Name: Pitcairn XT2GB Memory BufferRelease Date: March 2012Price: 299 $

Its little brother, Pitcairn Pro based HD7850 would also launch the same day for a price of $249. This variant would feature1280 stream processors, 80 texture units and 24 ROP's, A 2GB memory buffer (256-bit GDDR5). The card would run at 900Mhz/5000Mhz for Core and Memory respectively. A 1Gb version of the card would also be available for $219, Specs would remain the same.

AMD Radeon HD 7850

1280 Stream ProcessorsCode Name: Pitcairn Pro2GB Frame BufferRelease Date: February 2012Price: 249 $

AMD Radeon HD 7850

1280 Stream ProcessorsCode Name: Pitcairn Pro1GB Frame BufferRelease Date: February 2012Price: 219 $

Another SKU, HD7890 which is based on the Tahiti LE core is expected to launch in Q2 2012,The GPU would feature the Tahiti Die instead of the Pitcairn and pack 1536 Stream Processors, 96 Texture Units, 32 ROPs. A 1.5GB memory buffer with 384-bit wide interface. The GPU would be priced at $359 at launch.

AMD Radeon HD 7890

Code Name: Tahiti LE1.5GB Frame BufferRelease Date: Q2 2012Price: 359 $