Most newer boards don't really need to be put under water since they do not run very hot. When they are under water it's most likely for looks and having the extra money to spend for it. If you really want to cool it you'll probably have to find something universal.
UD4 has no NF200. As tangoseal said, that's the main reason for wanting to watercool motherboards now. The UD4 doesn't get appreciably hot. IIRC, the PCH is listed as having something like a 10w TDP.