When did I discover this? When I powered it up for the first time, I heard a series of 5 short beeps, 1 one beep. Looking that up in the manual and found:
5 short beeps + 1 long Memory error No memory detected in the beep system
So I rechecked that the sticks were in the right slots, and reseated them, just to be sure.
That’s when IRC pointed that I my motherboard requires unbuffered RAM and I had bought registered RAM.
Where did I go wrong? I didn’t read the specs for the motherboard. It says right there:
Memory Capacity 4x 240-pin DDR3 DIMM sockets Supports up to 32 GB DDR3 ECC Un-Buffered memory (UDIMM) Memory Type 1333/1600MHz*** ECC DDR3 SDRAM 72-bit, 240-pin gold-plated DIMMs DIMM Sizes 8GB, 4GB, 2GB, 1GB
Entirely my fault.
Read the fricking specs before you order.
Use recommended / tested RAM (I’m not).
Use the Memory Advisor from Crucial which clearly displayed the type of RAM required.
Check again before you order.
New RAM ordered
This is the new RAM I’ve order: Kingston 32GB (4 x 8GB) 240-Pin DDR3 SDRAM Unbuffered DDR3 1333 Server Memory Model KVR1333D3N9K4/32G. It should be here next week. Yes, I’m getting 32GB of RAM instead of the original 8GB of RAM.
For the record, I’ve already rechecked the server RAM.