Despite being low wattage, like I've heard people say the Antec Earthwatts 380w can power a mid end pc with a 5850 in it no problems, I've seen peoples signatures on forums claiming they have 2x GTX 560 ti's with a Corsair TX 650.
It appears to me that decent quality power supplies can run anything. Yet when I read reviews I never see this mentioned anywhere, instead I'm left thinking these power supplies are lacking.
Is there something I am missing here? Why don't the reviews tell us what the PSU's can manage? Instead they tell us about Transient Response Tests. While that's all good and dandy, telling us what graphic cards it can run specifically wouldn't hurt. I mean they already have the data.
Because there is a lot of reviews with the graphic cards and they give the power consumption of the graphic card(s). And after that you can calculate what PSU you need. http://www.guru3d.com/article/geforce-gtx-560-ti-sli-re... like this review is recommended an 700W power supply if you overclock everything on your pc, if nothing is overclocked an 650W Corsair can keep an pc with 560Ti in SLI.
"System Wattage with GPU in FULL Stress = 449W" ( Power measured from the wall socket, on an overclocked, water cooled, extra bling system )
1200w psu ( can't remember which ) let's say 90% efficiency
449*.9 = ~400w
That would be an 80% load on a 500 watt psu ( during the generic test that simulates a game and won't be disclosed for fear of a conspiracy ), kind of high, but not outside of a decent psu's capabilities ( as long as it's power is where it needs to be )