Disclaimer: These readings are from my own observations of household power used, taken with a Kill.a.watt (P3) meter.

I've been crunching on PS3grid for a little while...and the project has changed a bit since I started. Just a short time ago, the project Devs decided to provide support for GPU's (I guess the PS3 is just a big GPU anyway). But only Nvidia GPU's to date. Anyway, I have tried to stay with the GPU movement, and purchased a few to 'crunch' with. Here is a short rundown of my GPU units and their power consumption...

All my 'crunchers' use onboard video, and have no other drives connected, execpt for the HD. Unless I have added a GPU to 'crunch' with. When I say '100% load', that is all cores crunching Boinc.

I have added approx wu completion times. The time is variable (depending on the speed of your CPU), as the CPU impacts the speed at which the GPU is fed data.

AMD 5200 X2 (65 w).....100% load.....~105 watts (baseline for comparison)
OC'd to 2.8ghz
w/ 8800GT.....................................---not tested yet...1 wu in 16 hours

PS3 (40 gig).................100% load....~140 watts...........1 wu in 23 hours

AMD 9550 X4 (95 w)......100% load....~140 watts (baseline for comparison)
no OC, 2.2 ghz
w/ 8800GS.....................................~200 watts (runs at ~ 50 C)....1 wu in 20 hours
w/ 9800 GX2..................................~300 watts (runs at ~ 62 C)....1 wu (per gpu) in 15 hours

Boy, when you add a GPU, you can say 'Good-Bye' to low power 'crunching'.