1 GHash/s = 1,000 Mhash/s so 6.8 Ghash
I always wondered about that - cos really it should be 1024MH/s (call me pedantic)
I know the difference is not much, but it really does add up, if you are running a decent set up (like my upgraded LS & Jalapeno will be putting out a combined 37GH/s - which if it was 1024MH/s per Gh/s would be the equivalent of an extra 888MH/s)
Why do you think it should be 1024 MH? These aren't bytes... (or bits, from whence your confusion likely springs)
Yup - that was where my initial confusion came from - logic dictated that it would be a straight 1000, but some tiny bit of me wanted that extra 24 (it is my optimistic side, and therefore tiny, sadly)
At least I have the right of it now. Cheers
![Smiley](https://bitcointalk.org/Smileys/default/smiley.gif)
I'd agree and say that it is confusing. A lot of people just use it incorrectly, and aren't aware of the difference between a megabyte (MB) and a mebibyte (MiB) - http://en.wikipedia.org/wiki/Mebibyte