There's been some rising in cryptsy. I'm mining at the moment. Lets see..

Hey. From what I remember when looking at the Pi, there has to be a list somewhere of certain brands/models of externally powered usb hubs that are actually recommended for raspberry Pi. I guess a simple random usb hub might have power issues if not incompatibility but one can always try!

I saw this old topic but had to post this for anyone that is curious.

I had the *exact* same issue, with the same cards. I ended up putting them into two different PCs.
Also x-fire seems to NOT stack perfectly, so that the overall hash/s is not really doubled.
Generally, what I did when I had both cards x-fired was underclock the hot card a *lot*.
Kind of a disappointing issue. But also, if there is some cleverly put ventillation / cooling it seems
that it helps.

Hello, there, I mine already and I'm probably gonna run a custom pool soon but I'll happily be a newb for awhile
My rig: 2 PCs x 1 7850 each.
Also, people hold your coins!