No the crunch issue is the sound card,

that is what appears on vista. However on 7, i get a nasty control panel app that crashes half the time and won't do the majority of the functions. Without the mixer app I can't have the virtual surround sound added properly nor can I get the nice global equaliser effect or alter the individual speaker levels or bass redirection options. It's very frustrating and would require me to essentialy buy new stuff, which given that I have a socket 939 machine means I might as well be pouring money down the drain as I need to replace the entire thing eventually.
It's a shame as it was really nice being finally able to use a 64 bit operating system. (and before anyone asks, no it wouldn't install on the 32 bit version either)