SetsulScrewballCheapest 80+ bronze 500watts+ available ATM1. Wrong. 500W and 550W are cheaper. Even from the same seller.
The 500 watt is known to have coil whine.
2. Wrong. You can get a new 500B (that means you get 3 years warranty instead of none) for less.
That is more expensive and put him over budget.
3. How many times do I have to repeat this? What the fuck would you need 600W for? I'm taking any bet the mobo you picked doesn't support 8x/8x and without watercooling a GPU drawing 500W will just catch fire.
Future upgradability and overclocking. Also you don't want to be drawing close to the limit of the PSU if you can avoid it even if the PSU is rated high enough. It reduces efficiency and increases noise.
1. Seasonic isn't the only OEM out there.
But it is a consistently good OEM
2. 400W (500W if you absolutely must) is plenty for these kinds of builds.
A OC'd 7970 can draw 300 watts on it's own. http://images.hardocp.com/images/articles/1333919389dsIgHKgld7_9_1.gif
3. 20$ for a used 400-500W PSU is ok. 30$ is ok if there are really no deals available. 45$ when new PSUs of similar performance sell for 40$ is not ok. 45$ when new PSUs with far better performance (e.g. CXM450) cost 50$ is not ok.
I mean even an S12II 520W sells for 47.98$. Are you really going to argue that in the category of decent 500W+ 80+ Bronze PSUs a used SS-600ET for 44.95$ is a better deal than a new SS-520GB for 47.98$? 3 years warranty vs none and literally twice as good in every metric is not worth 3$?
That seasonic was listed as $35 shipped last night.
If you insist that the lowest price wins what about an SS-500ET for 40$? Why are those 600W so important?
Coil whine
So what? He wants fps in Overwatch. More fps in games he doesn't play don't help.
I know you love your 7970, but Jesus, that doesn't mean everyone needs one.
Everything else is more expensive AND slower. The 7970 is by FAR the best GPU you can get for under 100 USD. Also your graphs are obsolete. The Radeon Relive drivers gave a significant FPS boost in Overwatch to all AMD cards.