I would rather pick an i5-4670k, makes no sense to buy Ivy-bridge, when you can get better performance for almost the same money.
I wouldn't pick the GTX 770 4 GB version, if 2 GTX 670 in SLI can't take advantage of 4 GB of VRAM, then neither can a GTX 770, which is only 14-16% faster than a single GTX 670. There is a reason there isn't no 4 GB at the reference card, because it makes no sense. Only if in like 3-way SLI.
"We've given the ASUS GeForce GTX 670 DirectCU II 4GB video cards plenty of opportunities to prove to us why we would need 4GB of VRAM on these. Unfortunately, these have come short of proving this. We tried pushing a single ASUS GTX 670 4GB to the max on a 30" display, at more than playable settings, and also at 1080p. We saw no advantages with a single card. Then we put two together in SLI and tried to push them to the max at 5760x1200. What we found was that higher settings were possible to enable, but the performance wasn't there to allow them to be playable. Simply, the performance of GTX 670 isn't enough to utilize the capacity of 4GB of VRAM.
This is a shame, because the extra RAM has pushed up the pricing on the ASUS GTX 670 4GB to levels that are near Radeon HD 7970 GHz Edition and GeForce GTX 680 video cards at $459.99. Both of those video cards are clearly faster than GeForce GTX 670 GPU based video cards. So the extra money, doesn't buy us the extra performance we would want. Instead, the extra money, is better spent buying the faster GTX 680 or HD 7970 GHz Edition GPU based video card, to get better performance in games."
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http://www.hardocp.com/article/2013/01/14/asus_geforce_gtx_670_directcu_ii_4gb_sli_review/9#.UdiTbvnJTF8
About the PSU? Don't you have any details? A W750 PSU sounds good, but if it is cheap as socks from Wallmart, then it's nothing worth. Details are needed, at least a name.
I do however agree with the others, get a decent CPU cooler and overclock the CPU. Makes no sense to get an overclockable PC with no proper cooling.
It is not known yet if you can play BF4, at highest details. However DayZ standalone, Crysis and Skyrim are assured, you will have no trouble playing at highest details.
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