What are good, safe, conservative maximum temperatures for Xeon 1366-family systems that are running WCG 24x7 (not just CPU, but VREGs, etc, too)? I'm using an air-cooled SR-2 / X5650 (no OC yet, due to cooling issues).

Seems like a simple enough question, but looking around on the web, the opinions seem to vary widely. Short-term peaks are one thing; constant and long-term is another.

Also, what's the benefit of moving to water cooling, in terms of achievable throughput and effect on system life?