VR-Zone is reporting that R600 is set to be launched on March 9th in two different varieties, the X2800XTX and the X2800XT. The XTX will come with either 512MB or a full 1GB of GDDR4 memory clocked at 2.2GHz with a core clock of 750MHz. The XT will have 512MB of GDDR3 clocked at 1.8GHz with a core clock of just 600MHz.
The XTX is sure to be a monster and I am personally foaming at the mouth in anticipation of its much-delayed arrival. I can't wait to see what they're going to do with all that memory bandwidth. I am, however, slightly concerned with the dramatic gap in core clock between the XT and XTX versions. The X1900XTX and X1900XT were much closer together in terms of core clocks. This suggests some issues getting good yields at 750MHz and I certainly hope the XTX doesn't turn into another phantom edition. On the other hand, it's quite encouraging to see no mention of disabled pipelines on the XT version, which might make for some interesting overclocking opportunities.
Check out the VR-Zone article here: