Are these parts compatible, and is this a fast gaming PC?

[xiang2011]

If you could also think of anyother Compatible Parts to make this computer faster without going over $1,500 (current price is $1,480) it would be appreciated. This is als going to be a desktop so should i go with windows 7 or windows 8?

Specs-

Graphics Card-SAPPHIRE 100351SR Radeon HD 7970 3GB 384-bit GDDR5 PCI Express 3.0 x16 HDCP Ready CrossFireX Support Video Card OC with Boost

CPU- Intel Core i5-3570K Ivy Bridge 3.4GHz (3.8GHz Turbo) LGA 1155 77W Quad-Core Desktop Processor Intel HD Graphics 4000 BX80637I53570K

Motherboard-ASUS SABERTOOTH Z77 LGA 1155 Intel Z77 HDMI SATA 6Gb/s USB 3.0 ATX Intel Motherboard

Ram- Mushkin Enhanced Blackline 8GB (2 x 4GB) 240-Pin DDR3 SDRAM DDR3 2000 (PC3 16000) Desktop Memory Model 996991

Secondary Memory- Western Digital WD Black WD1002FAEX 1TB 7200 RPM SATA 6.0Gb/s 3.5" Internal Hard Drive -Bare Drive

Fans-EVERCOOL TTC-NK85TZ/V2(RB) 120mm Z-AXIS Titan Fenrir CPU Cooler

Power Supply- CORSAIR Enthusiast Series TX750 V2 750W ATX12V v2.31/ EPS12V v2.92 80 PLUS BRONZE Certified Active PFC High Performance Power ...

Samsung NB Series NB30 (White) Keyboard

Wireless Card-Rosewill RNX-G300EX IEEE 802.11b/g PCI Wireless Card Up to 54Mbps Data Rates 64/128bit WEP WPA WPA2 802.1x, 802.11i, AES, ...

Primary Memory-Crucial M4 CT064M4SSD2 2.5" 64GB SATA III MLC Internal Solid State Drive (SSD)

System Driver-Microsoft Windows 8 64-bit (Full Version) - OEM

Case-Rosewill BLACKHAWK Gaming ATX Mid Tower Computer Case and Samsung Keyboard Cover .