NVIDIA on Thursday announced that its GeForce GTX 275 is due to arrive in certain stores as soon as next week. The GPU features 240 processor cores operating at 1,404MHz, 80 texture processing units, and a 448-bit memory interface. The card uses the existing GTX 260's 896MB of memory, and shares the same 644MHz 55nm GT200 processor in the GTX 285, splitting the two existing products in terms of pr