Could 500w be enoungh?

[lpiotoole]

Just wondering if its possible for me to reduce the cost by getting a 500w psu instead of a 600w or is it necessary to get a 600w one? My build is the one on this post http://www.tomshardware.com/forum/forum2.php?config=tomshardwareus.inc&cat=31&post=342666&page=1&p=1&sondage=0&owntopic=1&trash=0&trash_post=0&print=0&numreponse=0&quote_only=0&new=0&nojs=0

Thanks for any replies

 

[abekl]

You could get by with a good quality 500W PSU, but I'd be alot more comfortable with some headroom, as in a 600W PSU.

 

[ko888]

For a system using a single GeForce GTX 560 Ti graphics card NVIDIA specifies a minimum of a 500 Watt or greater power supply that has a combined +12 Volt continuous current rating of 30 Amps or greater and that has at least two 6-pin PCI Express supplementary power connectors.

For a system using two GeForce GTX 560 Ti graphics cards in 2-way SLI mode NVIDIA specifies a minimum of a 700 Watt or greater power supply that has a combined +12 Volt continuous current rating of 52 Amps or greater and that has at least four 6-pin PCI Express supplementary power connectors.

Total Power Supply Wattage is NOT the crucial factor in power supply selection!!! Total Continuous Amperage Available on the +12V Rail(s) is the most important factor.

 

[lpiotoole]

Best answer selected by lpiotoole.

 

[gary1]

What website is that from? It's really useful.