System upgrade - will I have to reformat/reinstall Windows?

I'll be upgrading my system in the next few days and I just wanted to know if, along with everything else I'll have to do, if I'll need to reformat/reinstall Windows. This is what's changing:

Athlon 64 3000+ 939 -> Opteron 165
MSI K8N Neo2 Plat (nForce 3 Ultra) -> DFI NF4 SLI-D (nForce 4 SLI)
PNY 6800 GT -> eVga 7900GT 512MB

I will uninstall the drivers (mainboard, video, SATA/ide, etc.) before installing the new hardware.

Will I, or should I have to reinstall Windows? I'd do it anyways except I have XP set/tweaked just the way I want it and don't feel like doing it all again (I've actually done it a few times the last few months b/c of HD changes), as well as all of the installed programs (I'm assuming I'd have to reinstall them all even though I have Windows on C:\ and all programs and everything else on my D:\ partition).

If I don't have to, any tips or things I may forget to do in order to make sure it works right?

Thanks!

no just put the BIOS on full so it can detect & it should work with out format

You should be able to swap everything and have it run fine, it might not be as fast as a clean install would be but should be more than usable. I have done motherboard+cpu+video swaps without even uninstalling the old drivers and everything worked alright, but I reformatted 2 days later anyways.

What do you mean by put the BIOS on full?

this is full so you see this

So what kind of a BIOS setting would you set for that? Disable quick boot?

As much as I hate looking at the install of Windows. I always mention. Fresh install for fresh hardware.

You can try a lot of tricks to keep your install. Sure it seems easier. Overall you save time and effort just writing the data to a backup. Then reinstalling fresh.

Since your more then likely will not get everything. If you are asking how to keep the current for a new build. One would assume you do not know how to rip out drivers and make sure it s ready for the next build.

Lest we not forget the registry. It houses all our data in Windows. Who cares what the rest of the machine says.

Just do a healthy backup and start redoing your machine the right way. Unless you have the skillz to rip stuff out. It saves many many many many headaches later on.