Even though you could actually buy the HD 4850 for a while, PowerColor has officially announced its HD 4800 series just today.

The previously seen HD 4850 works at 625MHz for core and comes with 512MB of GDDR3 memory clocked at 993MHz (1,986MHz effective) paired up with the 256bit memory interface. The newly announced HD 4870 is the first graphics card that comes with GDDR5 memory, which is in this case clocked at 900MHz (3,600MHz effective) and the RV770 XT core works at 750MHz.

The entire series is based on the RV770 core chip which is made by 55nm technology and has 800 stream processors, 40 texture units and 16 render back ends. It also features support for DirectX 10.1, ATI CrossfireX, PCI-Express 2.0 and HDMI.

We talked a lot about this new series and here are the pictures of these two PowerColor cards.