You seem to have a nicely picked out list of parts here. To answer your question, all your parts are compatible, but make sure that the thermal armor on the Sabertooth isn't going to interfere with your CPU Cooler. Also, when you mean "Primary", does that mean the OS and games?
Or does that include most of your other things as well? Because if it does, then I would probably get a 120gb ssd or a 240. I do have a couple of recommendations though.
Even though the power supply you've chosen is great and can deliver adequate power to all your parts, it is not a modular power supply. I once also asked a very similar question to yours, and I had previously picked the exact same power supply. Having a modular power supply can be great for the cable management and make everything look a lot tidier.
You will have to spend a bit more cash on a good modular power supply, but I think its 100% worth it, because of the importance of a good power supply that most people overlook. When you're building a PC, NEVER cheap out on the power supply (Even though the TX750 is far from being a cheap power supply, it's not modular). For your build, I would strongly recommend getting an AX650/750/850, depending on how much you might need in the future.
AX850: http://www.newegg.com/Product/Product.as... AX750: http://www.newegg.com/Product/Product.as... These power supplies have 80 Plus Gold certified, as well as a completely modular interface and Corsair's 7 Year warranty. There is also an AX1200, but you will definitely not need it unless running something like a Quad SLI. Once again, you will have to dig out a bit more cash, but I believe it's worth it.
The "HX" series is very good as well, but is a step down from the "AX" series. For your graphics card, I would probably recomend the MSI N670 because of the cooler, looks, and higher pre-overclocked settings. Although the gigabyte card is good, the MSi card is at $370 after rebate right now.
Here is the link if you want to consider getting that. MSI N670: http://www.newegg.com/Product/Product.as... Other than those recommendations, everything you've chosen here looks pretty good. The case is up to personal preference so I won't give you my opinion on that.
Just make sure you find one with good cooling. Building your computer will have not much difference from building other computers, just that the parts are a bit different. Look around on YouTube or the internet if you're unsure on how to build it properly.
I hope I helped with this answer, and good luck!
Looks like it. That's gonna be a beast machine!
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