Advice

[Deathwing]

I'm mining together with my friend, i got 55 he got 260~ mh/s what should we do?

[jayeeyee]

Absolutely nothing.  A combined hashrate of 315mh/s will NOT do anything for you the both of you.

To put it in perspective, you'll earn about $48 dollars a month while paying $22 dollars a month for power cost under my random estimate of 200w for both cards and a electricity rate of 0.15kWh.  So in the end, you'll earn $26 dollars a month and that's only at the current BTC rate.  Good luck.