The last couple of days, pics and 3DMark of AMD Radeon HD 4890′ were leaked and take some attention. The Radeon HD4890 will release in April 6, and NVIDIA will release GeForce GTX275 at the same time, and takes direct aim at HD4890. According to NVIDIA, it will not release any reference cards of GTX275, but the AIC can get the licence to design the non-reference GTX275 and manufacture it. GTX275 will has a higher clock than GTX260, but its specific frequencies are not yet clear.
