Just started mining about 3 days ago, Seti > Folding > Bitcoins > need to swap out some nvidia hardware.
I too have a Kill A Watt but won't be able to hook it up to my other (ATI) computer for a few days.
I basically have two main computers, my main one which was setup for video editing/gaming and the other which was a local server but has a decent mobo and a fairly anemic proc, it was a gift . . .
I just ordered a 5870 for the old server to see how that goes, and 2x GTX560Ti for the video/gaming rig.
1) i7 920 on water @ 3.4, HAF 932, 12GB DDR3, Adaptec 3805, 2x147GB raid 0, 4x500GB raid 0, 2GB RAM DISK, EVGA GTX 260 (650/1401/1025), EVGA 9800GT (just sitting there), some EVGA x58 mobo, Vista 64, GUIMiner v2011-04-26. Corsair 750W ps
2)This one is doing 44.8 Mhash/s on the GTX260, the other is doing ~ 72 Mhash/s with the stock GTX560Ti
3)305W idle, 424 mining on one GPU
As an aside and a not so urgent plea for help, I just installed GUIMiner and Bitcoin on the main video/gaming rig this PM.
Just got an error that said something like "Call to Bitcoin Failed". I know I need to understand how to use startup flags/server/connect etc but I guess I don't get it and this may be part of the error. please pm me as not to pollute this post, if you choose . . .
<edit> Just got a 5870 today, plugged it in, installed SDK 2.1 and CCC/driver, ran auto tune, suggested 990/1235, now getting 339 Mh . . . woot
Will put it on the Kill A Watt later.
boscoj