Windows 7 Professional 64 Bit OEM
By Microsoft (FQC-08289)
Windows 7 was designed to simplify the things you do every day, work the way you want, and make some exciting new things possible. Windows 7 was designed to work with today's multi-core processors. All 32-bit versions of Windows 7 can support up to 32 processor cores and up to 4GB of RAM, while 64-bit versions can support up to 256 processor cores and up to 16GB of RAM.