Originally Posted by OcSlave
I done some wattage testing on sli 570's using a plug in wattage meter, all tests' are from the wall;)
Thought i'd just share my findings as it is good solid proof of power requirements.
Wattage reading is took from a plug in reader that measures the power being sucked in from your wall so with my 80 bronze psu i will be using alittle less.
Have just started doing the test so i have only done my oc'd system, will do stock in a few min and then try some gamnes ect at oc and stock.
And a quick one with sli 670's
Should help give you a rough idea of what cards use.
Can you multiply the "at the wall" readings by .85 and put them in your posts?
For example, the 570 SLI wattage readings would be:
641W x .85 = 544.85W
526W x .85 = 447.1W
658W x .85 = 559.3
892W x .85 = 758.2W
In case some of you are like "758.2?!?!", see his 570 SLI thread.
The most realistic here is the first one. Study his thread and you may notice why (I am very sleepy right now and I'm not as willing to put more effort into this like I usually am).
In other words, this seems to be showing that what I said in post #20 above is absolutely correct. Remember, I said, "However, they used Furmark at its highest settings in order to get that 589W "at the wall" reading, so this means that in real world conditions, it would be very difficult to even reach even 650W of power being pulled from the PSU." Yes, he got his system to pull 758.2W from his PSU, but that was OCCT's insane PSU test.
I think OcSlave's results show that with two 570s, even a high quality PSU that has the ability to continuously deliver 550W to your computer is enough.
In light of that, I'll put these here and then go get my sleep:
On PSU Efficiency
PSU "50% Load" Myth