Ughh, that sucks with the earlier revision board. It might be worth firing a quick email to their tech support to confirm.
Things are a bit more complicated nowadays...used to be a good chance you'd plug in and it would show up as unknown model.
Take note of what blahman says regarding the OEM side of things. If you do have an OEM windows and you have to change a motherboard due to 'malfunction' they should let you do that and carry over your licence (I'd maybe plug in your old cpu for the activation)