BTW I got 24 5970s. 60W a piece = 1.4KW. If my electricity was free I would still do it because that is 1.4KW less heat.
BTW phatk2 can run much lower than 300Mhz. I just noticed you said latest sdk. SDK 2.6 sucks for 5000 series cards and low memclock.
I live in a cold place, heating won't be an issue until mid-june at the earliest. If anything, I "save" on the heating bill
Also, I tend to run driver combos that let me game on this machine. My primary miner is a 4x6970 machine (running 3x now because apparently the motherboard likes to burn up at the pcie power plug...2 cables up in smoke so far)
Although I must admit 12.3 are shit for BF2, I get crashes about every hour on average while 11.11 were perfect (up until a week ago, when it started flickering like crazy...sigh)