No problem on the CPU side, but you'd better check if your server board/system supports Windows 7.
Thank you for your respond!
my system board is
ASUS P6X58D Premium LGA 1366 Intel X58 SATA 6Gb/s USB 3.0 ATX Intel Motherboard
CORSAIR DOMINATOR GT 4GB (2 x 2GB) 240-Pin DDR3 SDRAM DDR3 2000 (PC3 16000) Desktop Memory Model CMT4GX3M2A2000C8
What do you think?
I did a quick check on ASUS site and didn't found any Xeon CPUs on its CPU support list:
So you may want to double check with ASUS if you can use this CPU on your board. If the answer is yes then you'll be able to run both 32-bit and 64-bit Windows 7.