As reviewers world-over unbox their Radeon HD 4890 samples, NVIDIA, in a last-bid attempt not to give ATI a fortnight's headstart over GeForce GTX 275, has pulled its launch forward to April 2, the day Radeon HD 4890 hits shelves. Our sources however, indicate that this will be merely a paper-launch for NVIDIA, meaning that the actual product doesn't exist in retail channels, only that its SKU officially exists, get listed, perhaps gets open to pre-orders by retailers, and what's more, even previewed. It will be mid-April by the time retailers actually start to sell GeForce GTX 275 accelerators. The accelerators will be of non-reference designs, with the specifications we know so far: 55 nm G200b GPU, 240 stream processors, 448-bit GDDR3 memory interface, and 896 or 1792 MB of memory. The clock speeds the card will run at are known to be 633/1404/1138 MHz (core/shader/memory). Its price will be very competitive with that of the Radeon HD 4890, around the US $250 mark.