I have given up on my dual Opteron system (can't find a decently priced board that has 2 good sockets). In its place, I now have a Supermicro X9DRH-7F board which uses Narrow ILM mounting. Currently rocking two Supermicro 4U HSFs but at some point in the future I may look into water cooling the server. Does anyone know of a waterblock that has Narrow ILM mounting? So far my Google searches haven't come up with any.
Ok, just found some but spending more for one waterblock than I spent on the motherboard and the CPUs doesn't sit well with me.