Here's some more info about this GPU:
The RV560 Radeon X1650XT is expected to launch next week with a core clock 575 MHz unlike the previously reported 450 MHz. It appears ATI is getting better yields than previously expected, although the Radeon X1650XT was originally expected for an end of August or beginning of September launch. Radeon X1650XT graphics cards will feature 256MB of GDDR3 clocked at 675 MHz on a 128-bit memory interface. The Radeon X1650XT is expected to have 24 pixel-shaders, 12 pipelines and 8 vertex shaders. Similar to the Radeon X1950 Pro, the X1650XT will also feature an internal connection for CrossFire.