Ok I have been browsing the forums for awhile now and put a lot of thought into this computer! I am looking for a mid level gaming build where I can upgrade later on by adding on another video card(the same video card I believe), more ram, and a solid state drive. Very firm on the less than 700$ . Please let me know what you think, and what you would change/modify. Games I want to play with a decent framerate/graphics are Planetside 2, Starcraft 2, Dota2, Civ 5. Thank you!
It has 54A available on its single 12V rail and 4 x 6+2 pin PCI-E connectors.
That Sparkle one has 4 separate 12V rails each rated for 18A (which is not directly additive) and 1 x 6-pin and 1 x 6+2 pin connector. It may be rated at 750W but the wattage rating is practically meaningless and I'm just not sure about Sparkle for a PSU. The Rosewill one is a well-built Superflower OEM unit.
My other recommendation would be to drop your CPU down to an i3-3220 and use the money saved to get a 7850 video card. Having fewer cores will not hurt gaming performance but having a better video card will help a lot.
If your going intel and the i5 fits go with that. More cores for future gaming is worth while. If thats not an option consider going with amd for more breathing room on price like a 965 be x4. Still a capable gaming cpu. Id aim for a minimum hd7850 gpu and stay away from low end psu's. You can usually pick up a 550-600 w antec xfx or corsair psu for less then 80$ and its all you'll need.
Id go bigger for the psu if you plan to crossfire but stay with the reputable brands. More ram and an ssd with no crossfire you could still stick with the 600w and be fine. Also i may ne wrong but going over 8gb of ram for gaming probably wont yield much if any improvement.
I managed to cram in a 7870 and i5 3570 into the build. Though it uses a micro atx mobo and 600w PSU which is cutting it close for me if you crossfire it. The case is a cheap cooler master but has the ability to provide exceptional cooling if you add some fans to it.
If you can stretch the budget a little bit more I would put in a 700-750w PSU to be on the safe side if you crossfire it. Will probably set you back an additional $20-30 and I tried to keep this under 700 before mail in rebate.
If the budget was $700 AFTER rebates than I get this setup if your not dead set on the crossfire. It's quite similar to the other build but with a cheaper mobo (it does support Ivy Bridge out of the box according to reviews) and 500w PSU. The upside is that this has the 7950 in it. Comes to roughly $705 after $40 rebates or if you really want to be a perfectionist and save $5 you can go with the other brand for the card PowerCooler.
I personally go the 7950 if you can so you can avoid any issues of games not supporting crossfire. That and it's more performance from the get go and not latter down the line. And to my understanding it should give you better performance than 2 7770 in crossfire which seemed to be your original intent.
Oh should also mention I sacrificed more ram slots in both builds to free up cash for higher end GPU/CPU. So not quite as upgradable as you had hoped.
(Same as 7950 build but with 1x 8gbDDR3 1333 stick of ram instead of 2x 4gb 1600 ddr3, and cheaper. So now you can upgrade by filling in 2nd ram slot instead of buying all new ram) http://pcpartpicker.com/p/r0wG
On a final note the 7950 will get you Farcry 3, Sleeping Dogs, and Hitman for free.