I know for a fact that Retail serials are not tied. Cause i am not issued seperate serials for x86 and x64 version of Vista thru MSDN. I am given a single serial which will work on either version. the DVD's i download are Retail DVD's and contain both versions. It was only recently that they seperated them cause of SP1. But even so if you have a DL Burner you can get a All in One DVD that has both versions.
XP it did matter as well. Cause XP X64 was based off of Server 2003 which used a different serial algorithm than XP 32 Bit did.
I am checking now if OEM is specifically tied to a specific version or not.
XP it did matter as well. Cause XP X64 was based off of Server 2003 which used a different serial algorithm than XP 32 Bit did.
I am checking now if OEM is specifically tied to a specific version or not.