I'd completely chuck that whole build. The Thor is quite massive and you only need it if you're building around an XL-ATX motherboard like the EVGA Z77 FTW with a custom loop. And even then it's still kind of overkill. For gaming the Intel i5-3570K will smoke the FX-8150 in just about every single category, and the 670 and 680 are about the same card, the 670 is a bit more affordable. 16GB will not be used on a gaming rig, 8GB is plenty.
As far as wires, cables, accessories, things like that - all parts include what you need with one part or another - your PSU includes cable ties, your fan includes thermal compound, your case includes all the necessary mounts and screws, and the only tool you need is a philips head screwdriver.
If gaming is your focus, I'd recommend a system like this: