Re: $1500 Gaming PC
You can save some cash by going with an ASRock Z87 Extreme3, Samsung EVO 250GB, and dropping that PSU down to a Seasonic G series 650w. You don't need anymore wattage than that.
And actually, if you use the STEP mod completely it can take up to 4GB of VRAM. I've loaded up a 4GB 680 before running 2560x1600 downsampled, 8xAA, and all the maximum graphics options from STEP.
That being said though, it all depends on what resolution your dad plays at. If he plays at 1080p a 780 will be fine regardless of the lack of 1GB of extra VRAM as it's significantly more powerful than a single 680.
Also on the RAM, no need for anything faster than 1600. You didn't specify what speed you chose. Otherwise good all around.
Good choices really. If you have enough from the stuff I said before, just get him a 780ti.
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