Summary: The Asus z10pa-u8 (manual: http://images10.newegg.com/UploadFilesForNewegg/itemintelligence/ASUS/Bedienungsanleitung1446022124106.pdf) has 8 dimm slots. I get error code B7 (b7) when a dimm is used in C1 socket. I ordered a replacement MB and the same socket fails on the new one too. I tried a lot of things that were recommended here and elsewhere.
Details: Installed the MB and tried several combinations of dimms to rule out bad dimms, but all of them are working when used individually in A1 or in combinations (without C1 and C2). So I assumed C1 was the problem and ordered a replacement. Ended up installing it and now the problem appears again the exact same way. I upgraded to the latest bios. I tried a lot of other things (reinstall MB to make sure nothing underneath to short circuit; reset CMOS; note that the cpu/cooler were reinstalled in the process of moving over). I read everything I could possibly find on this topic and pondering a couple of possibilities. Appreciate any other possibilities or things to try:
1. Very unlikely, but maybe both motherboards have the same problem? Note that I installed them in separate cases so not the same case. I had to order a new case instead of using an older case to accommodate the large GPU (not installed yet).
2. I see a suggestion about loosening cpu cooler and may be reinstalling it after reseating the cpu. Is that a possibility? That one part of the cpu is busted or not functioning? How do I verify that? Any standalone test for the cpu? Such as memtest for memory? I haven't tried this reseating/reinstall of cooler. Update: Found this cpu diagnostic tool from Intel (http://www.tcsscreening.com/files/users/IPDT_LiveUSB/index.html). Will check it out later in the day.
3. These are identical samsung 2133 MHz DDR4 RDIMMs and get recognized as such in bios. This specific dimm is not explicitly listed in the ASUS AVL recommended list, but a lot of its related dimms are listed (32 GB LRDIMM; 16 GB ECC etc). Besides, if there is some incompatibility with a dimm, would it show up in this odd way -- failing only when installed in a specific socket?
4. Should I attempt any specific changes in memory settings in the bios? Such as lowering clock rate or some other option to see if something works even if that combination is not optimal (performance) as long as I get to use all 8 dimms (instead of just 6)?
Details: Installed the MB and tried several combinations of dimms to rule out bad dimms, but all of them are working when used individually in A1 or in combinations (without C1 and C2). So I assumed C1 was the problem and ordered a replacement. Ended up installing it and now the problem appears again the exact same way. I upgraded to the latest bios. I tried a lot of other things (reinstall MB to make sure nothing underneath to short circuit; reset CMOS; note that the cpu/cooler were reinstalled in the process of moving over). I read everything I could possibly find on this topic and pondering a couple of possibilities. Appreciate any other possibilities or things to try:
1. Very unlikely, but maybe both motherboards have the same problem? Note that I installed them in separate cases so not the same case. I had to order a new case instead of using an older case to accommodate the large GPU (not installed yet).
2. I see a suggestion about loosening cpu cooler and may be reinstalling it after reseating the cpu. Is that a possibility? That one part of the cpu is busted or not functioning? How do I verify that? Any standalone test for the cpu? Such as memtest for memory? I haven't tried this reseating/reinstall of cooler. Update: Found this cpu diagnostic tool from Intel (http://www.tcsscreening.com/files/users/IPDT_LiveUSB/index.html). Will check it out later in the day.
3. These are identical samsung 2133 MHz DDR4 RDIMMs and get recognized as such in bios. This specific dimm is not explicitly listed in the ASUS AVL recommended list, but a lot of its related dimms are listed (32 GB LRDIMM; 16 GB ECC etc). Besides, if there is some incompatibility with a dimm, would it show up in this odd way -- failing only when installed in a specific socket?
4. Should I attempt any specific changes in memory settings in the bios? Such as lowering clock rate or some other option to see if something works even if that combination is not optimal (performance) as long as I get to use all 8 dimms (instead of just 6)?
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