RMA Main Parts Require Clean OS

[Frigenchigen]

Okay I will be receiving my RMA items in a few days. I'm wondering whether I will need to re-install windows 7. All the parts will be the same because I got a replacement for motherboard, RAM, core i7 CPU. Everything was installed on my Western Digital Caviar Black 640GB. So anyone know if this will require the OS to be re-installed?
Specs
Corsair Dominator 1600MGHZ
Core i7 920
Asus P6T Deluxe V2
Sapphire 5970
Western Digital Caviar Black 640GB
Zalman 1000Watt PSU
Antec 1200

 

[jitpublisher]

If everything is the same, you should not have any problems.

 

[p55ibexpeak]

It's mostly the gpu & mobo that require a reinstall of os. If they'll be the same as before, you don't need to reinstall w7 which is much smarter than vista.