NVIDIA GT300 to feature 512-bit interface

512-bit GPU connected to 1-2 GB of GDDR5 memory at 1000 MHz QDR [Quad Data Rate]- we are looking at memory bandwidth of 256GB/s per single GPU, more than dual-GT200b GPU in the form of GeForce GTX295 [896-bit x 1GHz DDR = 224 GB/s]. That would be a conservative estimate, but given the development of GDDR5 memory, if the GT300 chip ends up connected to GDDR5 memory at 1050 or 1150 [alleged 5870/5870X2 clocks] - we are looking at memory bandwidth anywhere between 268.8-294.4 GB/s.

If overclocking-friendly vendors such as EVGA, BFG, Gainward or XFX overclock the cards to let's say 1180 ot 1200 MHz QDR [4.7-4.8 GigaTransfers/second, GT/s or "GHz"], first DirectX 11 GPUs will exceed 300GB/s of bandwidth per single GPU!