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Everything is compatible. Great case, the graphics card will fit fine. The power supply will work great with that single card. It should be fine even if you plan on going SLI in the future, but if that's the case you might want to go a little higher just in case.

..and the Hard Drive is 3.5", you're all set there.

hi sam, let's go down the list your processor is good and your motherboard is good have you seen the asus x58 sabertooth very attractive board. your power supply all the geeks are going to corsair i have never heard of stealthXstream. your hard drive the seagate barracuda is very good the top of the line is sony hard drives for the same amount of money i would consider the best and that isn't my call pcworld magazine. windows 7 is a very good choice and HP hewlet packard is a good name. the msi geforce is a little hot so i would consider a Nvidia geforce 9800gtx for the heat and noice and make sure that you have plenty of air flow which i ntoice that your case is a haf and that is very good. also look at amazon or tiger driect for a corsair 800d oblivion very handsome case and made clever too. but the mobo that you have is good corsair makes some very good ram at reasonable prices. you have a good mobo. good luck hope i was helpful to you

It looks good but I really have found that AMD chipsets are superior to the nForce offerings. For instance, nVidia offers nothing that can match the gaming capability of the AMD 790FX/890FX. If nVidia is the path you want to take, then it's perfect.

yes just make sure that the hard drive is 3.5'' and not 2.5''. The difference is that 3.5 is for desktops and 2.5 is for laptops