RMA'd mobo and CPU, do I need to re-install OS?

[kissenger]

So I RMA'd my 780i SLI because I thought it was dead and got back a 780i F.T.W. Turned out to not be a mobo issue so I had to get a new CPU (Q6600) which is due to arrive today.

My question is, is it wise to do a fresh re-install of my OS (Vista 64) or can I get away without it?

 

[kissenger]

I know, Vista is terrible. Just a bit short on money at the moment. Ideally I would be upgrading my whole rig...

Anywho, thanks for the advice. I was just worried that I might damage something if I tried to boot a pre-installed OS with a new mobo and CPU.