Dell Alienware X51 Slim Desktop Windows 7/ i7-4770 Processor/1TB HDD/8GB Memory/NVIDIA GeForce GTX 645 with 1GB GDDR5/Alienware USB Optical Mouse/Alienware Standard USB 2.0 Keyboard manufacturer: DELL; part number: AX51R2-5737BK Dell AX51R2-5737BK Alienware X51 i7 4770 8GB 1TB (AX51R2-5737BK)