I should also add, that it's not clear to me whether or not this CPU (E3-1265L V2) is actually compatible (although it appears to work fine for the 4 days before it starts crashing).
This link shows that it is listed as a compatible CPU
This link does not show that it works with this motherboard:
The page for the CPU itself lists the S1200BTLR as compatible:
OK, right mother board.
Original question - Independent Channel Mode as apposed to Mirrored (redundancy) channel mode.
Each one can run independently in slot DIMM_A1 but if I try to use two of them in DIMM_A1 and DIMM_B2, I get kernel panics after about four days of operation
you have 2 memory channels A & B
Slot 1 in any channel needs to be populated first. (It should not even see the DIMM in B2)
Ideal population is A1 & B1 (what DImms are you using? Are they the same type and size or different ?
Try A1 & B1 first then as a test you can try:
A1 & A2
B1 & B2
Depending on the memory type it will run slower with 2 DImms per channel
Sorry, typo in my original post. I am using DIMM_A1 and DIMM_B1 when I get kernel panics. I've been testing DIMM_A1 alone with each piece of memory to confirm there are no errors on each individual piece of memory.
The DIMMS I am using are Kingston KVR13E9/8I - DDR 1333 ECC Unbuffered CAS Latency 9. The only reason I chose this memory is because it's listed on the compatible memory page for this motherboard. The memory came in a kit with 2 identical pieces.
The motherboard has also been updated using the Bios, FRU, SDR and ME package 1.16.