Scroll down to page 14. For 512 bit blocks it says throughput is 1.51 Gbps @200 Mhz . Next page reveals a power consumption of 5mW.
So we are looking at 0.75 MH/s for 5mW ?
Scale that up and you get 750MH for 5W and still have a chip thats pretty damn small.
Actually I think it is 1.5MH/s @ 5mW.
Right?
1.51 Gbps = 1510Mbps / 512 bits per clock = 2.95MB/s. Bitcoin megahash is actually 2 SHA-256 hashes (2 blocks) so 2.95/2 ~= 1.5MH/s @ 5mW.
1.5MH/s / 0.005W = ~300 MH/W.