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Mapping RAM ECC warnings to the right DIMM

EEC ram warnings on librebooted kgpe-d16 with 4.2.0 kernel:

[32310.838759] [Hardware Error]: Corrected error, no action required.
[32310.838781] [Hardware Error]: CPU:24 (15:1:2) MC4_STATUS[-|CE|MiscV|-|AddrV|-|-|CECC]: 0x9c2c4000f8080a13
[32310.838811] [Hardware Error]: MC4 Error Address: 0x0000003feee4e3f0
[32310.838817] [Hardware Error]: MC4 Error (node 3): DRAM ECC error detected on the NB.
[32310.838841] EDAC MC3: 1 CE on mc#3csrow#1channel#0 (csrow:1 channel:0 page:0x3feee4e offset:0x3f0 grain:0 syndrome:0xf858)
[32310.838846] [Hardware Error]: cache level: L3/GEN, mem/io: MEM, mem-tx: RD, part-proc: RES (no timeout)

This location corresponds to this device in the sysfs (in a 4.2 kernel):

$ cat /sys/devices/system/edac/mc/mc3/rank2/dimm_label
mc#3csrow#1channel#0

Advice on #coreboot regarding which ram module may be the culprit (see likely correction below):

11:54 < personB> personA: MC 3 CSROW 1 is "memory controller 3" and if you are using dual-rank DIMMs it would be the first DIMM on the channel.  I'd guess slot D1
11:54 < personB> or actually D2, given ASUS flipped the numbers
12:41 < personA> personB: I predict this might corresponds to slot G2. (A/B would correspond to mc0, so G/H would be mc3. channel 0, so G, not H. And slot 2, not 1, because csrow 1 of
                 dual-ranked ram is slot 0 (slot 2 in a kgpe-d16?), so possibly G2.) What do you think?
12:42 < personB> personA: Yes, you are correct.  I was thinking of a different CPU entirely, mea culpa

It seems likely that csrow0/1 is slot 1 and csrow2/3 is slot 2 on the kgpe-d16 when using dual ranked ram. This is being tested at the time of writing.

Other helpful information that may assist in mapping errors to specific ram slots:

https://www.kernel.org/doc/Documentation/edac.txt
https://serverfault.com/questions/5672/ecc-chipkill-errors-which-dimm#8785