GeForce GTX 470 GPU
GeForce GTX 480 GPU
This shot of Fermi / GF100 GPU has been taken by a member of Ngacn.cc forums. The die size is approximately 530mm2. The reference is GF100-375-A3. The A3 stepping is the retail revision.
Concerning the features, the GeForce GTX 480 (GPU: GF100-375-A3) has 480 shaders processors or CUDA cores and according to this news that means the GTX 480 has 480/32 = 15 Streaming Multiprocessors (CUDA terminilogy) or Compute Units (OpenCL terminilogy). The GeForce GTX 480 comes with 1.5GB (1536MB to be accurate!) of GDDR5 memory with a 384-bit memory bus.
The GeForce GTX 470 (GPU: GF100-275-A3) has 14 SM which leads to 14*32 = 448 CUDA cores and is equipped with 1.25GB of GDDR5 memory (1280MB, 384-bit).
The difference between the GTX 480 and the GTX 470 is only ONE COMPUTE UNIT !!!
For the sake of memory, her is a comparison table between the G80 (GeForce 8800 GTX), the GT200 (GeForce GTX 280) and the full version of the GF100 (GeForce GTX 490 😉 )