With the recent release of Nvidia's GTX 285 (single GPU) and 295 (dual-GPU) videocards, ATI's performance crown has been under siege. But according to chatter around the web, the GPU maker is set to respond with a new videocard in a couple of months.
Specifically, VR-Zone claims to have confirmed ATI will release its HD 4890 in April. The new card is expected to use the RV790 core and would appear to put to rest an earlier rumor stating ATI plans to name its new card the HD 4970. As currently spec'd, the HD 4890 will come clocked at 850MHz with GDDR5 running at 975MHz. The current RV770-based HD 4870 runs at 750MHz (core) and 900MHz (memory).
VR-Zone also says there will be two versions of the new card, a standard and OC edition. The standard edition is expected to launch in mid-April, with the OC card reaching retail by the end of April. if the rumor pans out, expect the OC edition to cost $299 at launch.