maybe ATI series 5 can compete with gtx295 n gtx285

  GTX285 is diff category d...cannot compare like tat..1 core vs 2 core?  C'mon...

AMD is on the course of releasing a new line of high performance products based on its upcoming RV790 graphics processor. The high-end single GPU SKU, Radeon HD 4890 is expected to be competitive with NVIDIA's GeForce GTX 260 (216 SP). NVIDIA on the other end of the field, is planning a retaliation to the RV790. The GPU giant is carving out a new SKU based on the 55 nm G200b: GeForce GTX 275.

The new SKU will be placed in the US $225~275 range. While the specifications are not known at this point in time, there are two theories: G200b with 216 stream processors and a 512-bit memory interface, and the other theory suggesting 240 stream processors with the existing 448-bit memory interface on GTX 260. The latter looks inexpensive as the former would step up manufacturing costs due to the addition of two memory chips.

Weeks ahead of launch, Sapphire's Radeon HD 4890 graphics accelerator has already started to to get listed on online stores, not concentrated in a particular region. The HD 4890 is characterized by the upcoming RV790 graphics processor, it is a current-generation successor to the HD 4870 accelerator. Its specifications are unclear, though most sources in the industry and press have so far revealed it not to be much of a featureset expansion over the RV770.

Dutch retailer Salland Automatisering BV has listed the Sapphire-made accelerator for € 253.95 inclusive of VAT (€ 218.95 excluding it). Another retailer, PB Technologies Auckland (New Zealand), has listed it for NZ $613.97 (325 USD), including applicable taxes. The Dutch retailer went on to list some of the card's specifications. It features 1 GB of GDDR5 memory clocked at 3.90 GHz. Its core is clocked at 850 MHz. No pictures, or information about the GPU's internals (such as stream processor count, TMU/ROP counts) were provided. Both retailers have put the product on pre-order. AMD is expected to release the card on April 8, 2009.