Is my Vista cd key bound to a specific Bit rating?

I couldn't find anything about my specific subject, so excuse me if its been ''over'' discussed or anything.

I've been told by many that I made a mistake by buying 32bit. And I guess I regret my purchase. I've been stuck with XP ever since because I didn't gain any benefit, the perfomance loss was not worth to keep using Vista.

I recently I asked a close relative of mine to make me a copy of his Vista home premium 64bit sample.

Is the registration cd key code from my purchased version, bound to the specific bit rating? Or can I just change this? I really hope I didn't waste my money here

Thanks in advance.

My system: XP home (Vista home premium 32bit dusted somewhere arround) Quad 6600, 8800GTS 512mb, 2GB ram. Willing to upgrade to 4GB if I get the opportunity to upgrade to 64bit.

Product keys are unique for each edition but not for 32-bit or 64-bit. However, I don't think you can upgrade from 32-bit to 64-bit. You'll need to clean install, IIRC.

I repeat, the product key is NOT unique to 32-bit or 64-bit, only the edition. It doesn't matter whether its OEM, academic, or retail.

I would perform the formatting process eitherway

On the OEM subject, the reason that Microsoft's Alternate Media program to provide 64-bit install DVD doesn't accept OEM product keys is because the OEM is obligated to provide that kind of thing if the customer needs it. That's part of the OEM agreement (i.e. the OEM supports the customer, not Microsoft). Its not a 32-bit v. 64-bit thing.