We have a Server Motherboard X9SRL. And use a CPU Intel Xeon E5-1620. I see on your website SNK-P0048AP4, Active Heatsink for E5-2600/E5-2400. Can also use this heatsink for our E5-16xx cpu?
Yes, you can. This is a socket LGA2011 heatsink, and you have a socket 2011 CPU. You can best check heatsink compatibility and CPU compatibility by the socket (LGA) type.