Slightly OT, but today was a sad day for my mining.
Rig stopped responding. When I returned home, it was off, totally. Cannot be started.
Soon I found that one of my 5870 OC edition card died. PSU cannot run with that card in slot, so it seems like stupid problem with voltage stabilizer etc. Damn.
The card is in warranty (one month old), but there are no 5870 cards probably, so I will be refunded. Damn.
I bought Sapphire 5830 .. nice beast, looks cheapy, but can get to 1030 MHz in core. Then, its hot even more than 5870. Surprisingly, the power consumption is roughly the same!
I went down from 425 MH/s to 320 MH/s.
For building new rigs with 3-4 cards, 5830 seems to be nice choice.