Is this a good Gaming rig?

Planning on building my own gaming PC (First time builder).
Here are the specs.

Case: http://www.newegg.ca/Product/Produ [...] 6811119203

Power Supply: http://www.newegg.ca/Product/Produ [...] 6817339036

Operating System: http://www.newegg.ca/Product/Produ [...] 6832116986

MOBO: http://www.newegg.ca/Product/Produ [...] 6813131657

CPU: http://www.newegg.ca/Product/Produ [...] 6819103849

Graphics Card: TigerDirect.ca 404 Error - Page Not Found [...] =A271-6872

RAM: http://www.newegg.ca/Product/Produ [...] 6820104262

All the rest like hard drive, monitor, mouse, keyboard, ETC i already have.

Is everything compatible with each other? Do you suggest something else? Should I change anything?

Thanks guys

BTW, I didn't really know what category this thread is meant to be in so forgive me for that D:.

Wtf how did all the links break -,-

Mobo: ASUS M4A88T-M AM3 AMD 880G HDMI Micro ATX AMD Motherboard

CPU: AMD Phenom II X6 1090T Black Edition Thuban 3.2GHz 6 x 512KB L2 Cache 6MB L3 Cache Socket AM3 125W Six-Core Desktop Processor HDT90ZFBGRBOX

OS: Microsoft Windows 7 Home Premium SP1 64-bit - OEM

Power Supply: hec XPOWER780 600W(780W Peak) ATX12V v2.3 / EPS12V v2.91 SLI NVIDIA HYBRID-SLI Certified CrossFire Certified Power Supply

Case: COOLER MASTER Elite RC-310-BWN1-GP Black Steel / Plastic ATX Mid Tower Computer Case

Graphics Card: Sapphire Radeon 6870.

Oh and Btw my budget is 700-800 Dollars