Originally Posted by CravinR1
Spend alot of time for a benchmark where the 550 ti beat the 6850??
Since most reviews says it doesn't
This ^^. Stuck out like a sore thumb to me.
The GTX550 overclocked performs inbetween a 5770 and a 5830 depending on the game. The 1gb GTX460 is comparable to the 6850, both stock and overclocked, but the better 6850's overclock to higher than 6870 stock performance.
OP - the 550 WILL be fine for the games you mentioned, and honestly unless you're prepared to go for a GTX460 or HD6850, you should get the 550. The 6790 seems like a great card with some really high perfomance, but if you don't like AMD(ATI) then I guess there's nothing to be said.
In the interest of longevity, I concur with the others on here that you SHOULD try and shoot for a GTX460/560; the cost difference for the upgrade is so small right now compared with discovering a game he wants later this year or early next runs too slowly, or his screen dies and he gets a bigger one and suddenly his GPU isn't fairing so well. It's not a matter of being able to play it or not, of course the options can be turned down etc, but it's a matter of such a beneficial price/performance difference. Get a cheap 1gb GTX460 or HD6850 for only a small amount more. You'll find the performance REALLY high for a small increase upfront. A highly overclocked GTX460/6850 can go head to head with a GTX470 in certain situations, and the price difference between the GTX550 and them can be as little as ~10%.
The rest of the build looks great. Motherboard concerns me a little with a PhII quad core running, but its a 95w one so should hopefully be fine. Wouldn't overclock it though.
PSU could be smaller, a half-decent 500w would be plenty, depending on the video card choice and PSU's 12v rail.