Need help on what wattage power supply

Sure that would work. If you want to overpay for power that you will never use, that is.

A 560ti has a max TDP of 175w. A Phenom II X6 1100T has a max TDP of 125w. Throw in a liberal 100w for the rest of the system and that brings the total max consumption to 400w.

Of course, PSU's typically run best (and last longer) at 80% of total max output. That means your system would run perfectly fine on a quality 500w (400w/80%) PSU.

I'd suggest this one, which would do the job nicely:
http://www.newegg.com/Product/Product.aspx?Item=N82E16817139027

Actually, the 600w version's the same price after MIR. Might as well go for this one for some wiggle room down the road:
http://www.newegg.com/Product/Product.aspx?Item=N82E16817139028
 
1. that is insane overkill

2. there are units that are much less....um...mediocre.

3. about 450-500w would be better
 
I am going to vote for a 650w psu that has 4 pci-e connectors if you ever upgrade to two cards.

http://www.newegg.com/Product/Product.aspx?Item=N82E16817182071

Great unit from rosewill that is 80 plus GOLD with a 5 year warranty.

http://www.newegg.com/Product/Product.aspx?Item=N82E16817207014

Great unit from XFX that is 80 plus bronze with a 5 year warranty as well.

Neither is modular unfortunately. Here are reviews of each at the well respected jonnyguru site:

http://www.jonnyguru.com/modules.php?name=NDReviews&op=Story5&reid=266
http://www.jonnyguru.com/modules.php?name=NDReviews&op=Story9&reid=216

The rosewill review is of the 750w version, but the units will be very similar.
 
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