Fudzilla claims that NVIDIA has a stock of fully-functional GF104 GPUs ready to replace the GTX 470, which is based on the GF100 chip. The recently released GTX 460 has one of its eight shading multiprocessors disabled, meaning it has 336 CUDA cores out of a possible 384. The GTX 470, on the other hand, is a scaled down version of the GTX 480, with one of its SMs similarly disabled. By replacing that with the re-engineered GF104, the GTX 475 (or whatever they end up calling it) will bring more performance while cutting down on the heat, noise, and power consumption characteristic of the first-generation Fermi parts.