64bit gddr5? What a strange combination. So it actually have more bandwidth than gt640. 40GB/s vs 28GB/s... Interestingit says 64bits, that's half the of what the 650 have.
64bit GDDR5 should be as good as 128bit DDR3 numbers but I think it's worse because the card will only use half the "ROPs"!?
at the same time it's 1250MHz, while most DDR3 cards use 800 or 900.
so it's like 40GB/s, for this 640 64bit GDDR5
I would love to see power consumption number in this review. That would be interesting to see.