Questions On Compatibility

[Frijj]

I've decided to build my own rig, instead of buying a pre-built or buying one I choose the parts for. because it's cheaper and I think would be a good experience :). I'm just worried I will buy the wrong part, or wont buy enough parts etc. So I am posting here to see if i have the right stuff.

Also any upgrades/changes are welcome, apologies if it's terrible. Also it's a computer for gaming.

Case - Avenge Power Gangster BOS02A
(http://www.3bsystems.co.uk/avenge-power-gangster-bos02a-blkblkblue-p-7873.html)

Motherboard- P8H61-M LE/USB3 (http://uk.asus.com/Motherboards/Intel_Socket_1155/P8H61M_LEUSB3/#overview)

CPU - Intel 3rd Generation Core i7-3770K
(http://www.amazon.co.uk/Intel-Generation-i7-3770K-3-50GHz-Technology/dp/B007X1JM30)

CPU Cooler - Arctic Cooling Freezer 7 Pro Rev.2
(http://www.amazon.co.uk/Arctic-Cooling-Freezer-Rev-2-Cooler/dp/B002G392ZI)

Graphics Card - AFOX NVIDIA GeForce GTX560 SE 1GB GDDR5 192-Bit HDMI 2x DVI PCIe
(http://www.amazon.co.uk/AFOX-NVIDIA-GeForce-192-Bit-Graphics/dp/B008M6NZO2)

RAM - Transcend PC3-12800 Memory Kit (1600 MHz 240 Poles) DDR3-RAM 8GB
(http://www.amazon.co.uk/gp/product/B004G7XQC2)


Power Supply - Xigmatek NRP-PC402 400w
(http://www.amazon.co.uk/Xigmatek-NRP-PC402-400w-Power-Supply/dp/B002BVZP42)

Internal Hard Drive - Western Digital Scorpio Black 320GB SATAII 16MB Cache 2.5 inch
(http://www.amazon.co.uk/gp/product/B001CO3EKQ/)

Case Fans - Zalman 120mm Silent Case Fan
(http://www.boston.co.uk/products/zm-f3.aspx)

Thermal Paste - Arctic Cooling MX-4 4g
(http://www.amazon.co.uk/gp/offer-listing/B0045JCFLY/)

Dvd Drive - Asus DRW-24B5ST 24x Internal SATA DVD Drive
(http://www.amazon.co.uk/Asus-DRW-24B5ST-Internal-SATA-Drive/dp/B007IKS7AU)

Operating System - Microsoft Windows 7 Home Premium with Service Pack 1, 64-bit, English, 1 pack, DSP OEI (PC)

 

[zsde]

Couple of thoughts.
You go all out on a K CPU, which allows some overclocking headroom, but your board is not really meant for real overclocking. Maybe the -Pro version of the board would be a better option, alternatively just get the 3770 CPU. Your call.
These 3770K CPUs can get pretty hot and I would opt for the Freezer 13 cooler. That Freezer 7 will be OK, but may be stretched to keep that CPU at 60C.
With that CPU and GPU may I recommend you consider a PSU with some headroom. That 400W unit may do, but its pushing it to the limits. Suggest a CX500 or CX600.