Is that one or two GTX960 GPU cards? A 600W PSU would be enough for one card. 750W might be enough for two cards, but 850W-900W would be better.
I actually think the
ROG GTX960 Strix would be a better choice than that EVGA GTX960. If you plan to overclock the GPU, anyhow. Or just buy whichever of the two costs less.
That Thermaltake Core V21 Cube chassis is pretty nifty. Modular, reconfigurable, designed to accommodate all sorts of cooling options. It looks like it only comes with one 200mm (front intake) fan, another 120mm-140mm (rear exhaust) fan should be added to expel the heat generated by the GPU card and to increase general through-chassis airflow.
This is one instance where I'd recommend an AIO cooler - like
one of these. The fan/radiator could be top-mounted to assist with general airflow, while a large air cooler would actually impede airflow a little too much in such a small case. This case also has a big window, and your son's friends will likely be more impressed by liquid cooling bling than by a large air cooling radiator.
BeQuiet! offers a nice collection of CPU air coolers which perform well and look as good as air coolers can get. The
Cooler Master V8 is also robust enough for your build and has a decisive impact on overall appearance. Large air coolers can be quite massive, it's a bit unwise to dangle them off the CPU socket in a vertical-motherboard machine which might frequently get hauled off to local LAN parties and such.
I assume a college student's computer will see endless hours of use, including much gaming. And I assume that sooner or later your son will succumb to the temptation of overclocking his rig, lol. It might be worth spending just a little bit more on PSU and cooling to help ensure the whole machine doesn't fail catastrophically under a little strain.
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