Are these parts compatible with eachother?

[milopeach]

Im making my first gaming PC and am wondering if all the parts i have so far are compatible with eachother

Hard Drive -Western Digital Caviar Black 1TB WD1002FAEX
CPU - Intel Core i5 2500K
Graphics Card - Sapphire Radeon HD6970 2GB
RAM - G.Skill Ripjaws X F3-12800CL9Q-16GBXL (4x4GB) DDR3
Case - Lian Li Lancool First Knight PC-K63
Motherboard - Gigabyte GA-Z68X-UD3H-B3 Motherboard
PSU - OCZ Fatal1ty Series 750W Modular

[Necrolepsy]

Yes, they are.

[Rixis]

if you're getting the 2500K (note the K) then it means you plan on overclocking it? you might want an aftermarket cooler, at which point you'll need to check the size of the heatsink and whether or not the ram will fit underneath it (due to having ram heatsinks), but from a techncial standpoint, all the bits will go together that you've listed