Ok here are two systems is there a substantial performance difference. I play on a 1920x1080 Vista 64 games mostly like wow warhammer and some fps and will both systems play high end games.
2 SAPPHIRE Vapor-X 100269VXLE Radeon HD 4890 1GB 256-bit GDDR5 PCI Express 2.0 x16 HDCP Ready CrossFire Supported Video Card - Retail
AMD Phenom II X4 945 Deneb 3.0GHz Socket AM3 125W Quad-Core Processor Model HDX945FBGIBOX - Retail
Rosewill Xtreme Series RX750-D-B 750W Continuous @40°C ,80 PLUS Certified, ATX12V v2.2 & EPS12V v2.91, SLI Ready CrossFire ... - Retail
ASUS M4A78-E AM2+/AM3 AMD 790GX HDMI ATX AMD Motherboard - Retail
Thermaltake V9 Black Edition ATX Computer Gaming Chassis with Dual Oversized 230mm Ultra-Silent Cooling Fans VJ400G1N2Z Mid ... - Retail
SAMSUNG EcoGreen F2 HD103SI 1TB 5400 RPM SATA 3.0Gb/s 3.5" Internal Hard Drive - OEM
OCZ Reaper HPC Edition 4GB (2 x 2GB) 240-Pin DDR2 SDRAM DDR2 800 (PC2 6400) Dual Channel Kit
Total 919.87
VS
COOLER MASTER Storm Scout SGC-2000-KKN1-GP Black Steel / Plastic ATX Mid Tower Computer Case
Western Digital Caviar Black WD1001FALS 1TB 7200 RPM SATA 3.0Gb/s 3.5" Internal Hard Drives - OEM
ASUS Crosshair III Formula AM3 AMD 790FX ATX AMD Motherboard - Retail
2 ASUS EAH4770 FORMULA/DI/512MD5 Radeon HD 4770 512MB 128-bit GDDR5 PCI Express 2.0 x16 HDCP Ready CrossFire Supported Video ... - Retail
CORSAIR CMPSU-850HX 850W ATX12V 2.3 / EPS12V 2.91 80 PLUS SILVER Certified Modular Active PFC
mushkin XP 4GB (2 x 2GB) 240-Pin DDR3 SDRAM DDR3 1600 (PC3 12800) Dual Channel Kit Desktop
AMD Phenom II X4 965 Black Edition Deneb 3.4GHz Socket AM3 140W Quad-Core Processor Model HDZ965FBGIBOX - Retail
Total 1129.93
What one would you go with
2 SAPPHIRE Vapor-X 100269VXLE Radeon HD 4890 1GB 256-bit GDDR5 PCI Express 2.0 x16 HDCP Ready CrossFire Supported Video Card - Retail
AMD Phenom II X4 945 Deneb 3.0GHz Socket AM3 125W Quad-Core Processor Model HDX945FBGIBOX - Retail
Rosewill Xtreme Series RX750-D-B 750W Continuous @40°C ,80 PLUS Certified, ATX12V v2.2 & EPS12V v2.91, SLI Ready CrossFire ... - Retail
ASUS M4A78-E AM2+/AM3 AMD 790GX HDMI ATX AMD Motherboard - Retail
Thermaltake V9 Black Edition ATX Computer Gaming Chassis with Dual Oversized 230mm Ultra-Silent Cooling Fans VJ400G1N2Z Mid ... - Retail
SAMSUNG EcoGreen F2 HD103SI 1TB 5400 RPM SATA 3.0Gb/s 3.5" Internal Hard Drive - OEM
OCZ Reaper HPC Edition 4GB (2 x 2GB) 240-Pin DDR2 SDRAM DDR2 800 (PC2 6400) Dual Channel Kit
Total 919.87
VS
COOLER MASTER Storm Scout SGC-2000-KKN1-GP Black Steel / Plastic ATX Mid Tower Computer Case
Western Digital Caviar Black WD1001FALS 1TB 7200 RPM SATA 3.0Gb/s 3.5" Internal Hard Drives - OEM
ASUS Crosshair III Formula AM3 AMD 790FX ATX AMD Motherboard - Retail
2 ASUS EAH4770 FORMULA/DI/512MD5 Radeon HD 4770 512MB 128-bit GDDR5 PCI Express 2.0 x16 HDCP Ready CrossFire Supported Video ... - Retail
CORSAIR CMPSU-850HX 850W ATX12V 2.3 / EPS12V 2.91 80 PLUS SILVER Certified Modular Active PFC
mushkin XP 4GB (2 x 2GB) 240-Pin DDR3 SDRAM DDR3 1600 (PC3 12800) Dual Channel Kit Desktop
AMD Phenom II X4 965 Black Edition Deneb 3.4GHz Socket AM3 140W Quad-Core Processor Model HDZ965FBGIBOX - Retail
Total 1129.93
What one would you go with