It looks like a previous rumor is confirmed, all streaming multiprocessors (SMs) physically present on the GF100 will be enabled. meaning 512 shader processors, and ROP count to 64. The most likely name for this SKU is GeForce GTX 485. Apart from a higher CUDA core and ROP count than that of the GTX 480, slightly higher clock-speeds for the GPU are also on the cards. The memory subsystem remains untouched, at 1536 MB of GDDR5 memory clocked at 924 MHz (effective 3.7 GHz), over a 384-bit wide memory interface.

Well memory wise that's what the rumor says, we thing another 256MB of memory will (must) be added for the extra SM cluster, which would mean 1792MB of memory.

We do not expect this SKU to launch this summer, yet likely late Q3 2010.