Tim,
I'm pretty sure you had the Hammerfall 9632.
The 9652 is 3 banks of ADAT (I don't know how they come up with 52 channels).
It does have 64 bit drivers, the Hammerfall 9632 does not.
The 9652 is a PCI, not PCI-e card; some of the new MB's have issues on the PCI buss.
Backwoods looks like you are buying used?
You should make sure your MB PCI buss is not "bridged"; I think that's right.
Dig around, there has been some discussion here and at the RME user forum.
And as Tim said, usually you are using a digital console for your analog in and out.
The 9652 has no analog in or out, maybe the "expansion board" has some, but that's an add on.
HTH
Tom