I have an Asrock z87m Extreme4 with an i5-4670, which has been working fine. After moving it around to a different case, I've begun to get the following message on boot: "CPU cannot recognize the memory in Channel A. Reseat or replace" or something very close to that. All the ram I've tried are on the list of approved memory, and of course, was working fine for quite some time. It doesn't matter which A chan slot I use, it only recognizes the B chan memory. Have swapped around all the permutations, have populated all 4 slots and it reads and reports all the B chan memory. Have updated BIOS, altho I'm having trouble getting to see and flash the very latest, but have come up at least one level from what was there before.
So my problem is not the memory, and I've been assuming must be mobo. But it seems unlikely to be a bad physical slot issue, unlikely that both failed physically, so I guess my question is, is there a common point downstream from the memory that would fail and take out both slots, or could it be the cpu itself? Cpu seems to work fine otherwise, all cores reporting etc. What say you guys who know something about how a mobo is "wired"?
So my problem is not the memory, and I've been assuming must be mobo. But it seems unlikely to be a bad physical slot issue, unlikely that both failed physically, so I guess my question is, is there a common point downstream from the memory that would fail and take out both slots, or could it be the cpu itself? Cpu seems to work fine otherwise, all cores reporting etc. What say you guys who know something about how a mobo is "wired"?