BIOS: 2011.01.18 (A) (9 Feb 2011)
PROCESSORS: Dual E5504 (2.0GHz 4MB)
RAM1: MT36JSZF51272PZ-1G4F1AB 1110
4GB 2Rx4 PC3-10600R-9-10-J0
P/N: 500203-061
RAM2: M39385170FH0-CH9Q5 M1111
4GB 2Rx4 PC3-10600R-9-10-E1-P1
P/N: 500203-061
Originally 4 sticks of RAM1 installed, slots 2A and 4B on both processors. 16GB (BIOS displayed)
I picked up 4 sticks of RAM2, installing them into slots 6C and 1D on both processors.
After the upgrade, the BIOS displayed 20480MB. Should have been 32GB...
So I removed all of RAM2 and then the BIOS displayed 12288MB.
Thoroughly confused, I removed all the memory and started a stick at a time.
First, I populated CPU1 slots. First with RAM1 then RAM2.
Populated slot Memory displayed
=================================
CPU1_CH1_DIMM2A 4096
CPU1_CH2_DIMM4B 8192
CPU1_CH3_DIMM6C 12288
CPU1_CH1_DIMM1D 16384
CPU1_CH2_DIMM3E 20480
CPU1_CH3_DIMM5F 24576
Looking good. So I removed all the memory and tried CPU2.
Populated slot Memory displayed
=================================
CPU2_CH1_DIMM2A eight long beeps, no display at all
CPU2_CH2_DIMM4B 4096
CPU2_CH3_DIMM6C 8192
CPU2_CH1_DIMM1D 4096
CPU2_CH2_DIMM3E 4096
CPU2_CH3_DIMM5F 8192
Look like Channel 1 on CPU2 is having issues? Doesn't explain the change with slot 3E then though...
For completion sake, I poluated both CPU's as the book says. Again Using RAM1 up first then RAM2.
Populated slot pairs Memory displayed
=================================
CPUx_CH1_DIMM2A 4096
CPUx_CH2_DIMM4B 12288
CPUx_CH3_DIMM6C 20480
CPUx_CH1_DIMM1D 20480
CPUx_CH2_DIMM3E n/a
CPUx_CH3_DIMM5F n/a
Does anyone have any idea WTF is going on here? Server had been solid for years now...
Sanity check, CPU1 slots are ordered bottom to top and CPU2 is top to bottom, right?