AMD's HyperTransport 3.0 chipset, 'RS880', may have been put back a quarter.

Roadmaps that leaked out in July this year had the Socket AM3 RS880 down for a Q2 2009 release, but an update to AMD's integrated-chipset launch schedule reported this week indicates that part now won't ship until Q3 2009.

The RS880 will incorporate an 'RV620' graphics core supporting DirectX 10.1 and Shader Model 4.1 - essentially, it's a Radeon HD 3400 core.

The chipset will also feature AMD's second-generation Universal Video Decoder (UVD) core and be capable of hosting VGA, DVI, HDMI and DisplayPort screens.

Before the RS880's release, we expect to see a new version of the 'RD790' - aka 790FX - chipset which will support Socket AM3 and the new SB750 southbridge part.

The SB750 is now available - as the July roadmap forecast - as part of the 790GX integrated chipset. It has a Radeon HD 3300 graphics core on board.