Dual channel not working

davidzeutzius

Commendable
Mar 15, 2016
3
0
1,510
I have an A10 7850K in an A88XM-A motherboard. it has never worked in dual channel memory since I've purchased it at end 2013 / early 2014. My memory is 2X4GB of Corsair and 2X4GB of Gskill (both 1600, only 2 slots filled and one type in the machine at a time). Both are match of QVL except maybe 2nd to last or 1 extra character on the end. When loading OS in dual channel i get something like data corrupt or missing. it works great in single channel. BIOS is up to 29 now (i'm at that version, but last version I tried dual channel on was 24), it started back below 10. At first I thought the issue was with the hard drive or CD/DVD drive (replaced both early on). But when I put in the Gskill memory with the same error as corsair I've sort of defaulted back to the motherboard. Any ideas, I'm thinking of buying like 2133 or 1866 that matches QVL perfectly, and if it doesn't work dual just getting that many more MB/second of speed in single channel. other option is to try another motherboard.
 
Solution
Try starting with one stick in slot 1, set it to spec in the BIOS, then raise the DRAM voltage + 0.06 (i.e. for 1.5 DRAM set to 1.56) and then find the CPU/NB voltage and set to 1.2, save, exit, shutdown and add the second stick in slot 3 (so you will be in A1 and B1) and give it a try

davidzeutzius

Commendable
Mar 15, 2016
3
0
1,510
Standard retail cooler with CPU. on both Corsair and Gskill it uses all 8GB, but Corsair would only run at 1333. System became unstable and caused OS reinstall when I tried to move Corsair to 1600. Originally I tried slot A1 and B1 and A2 and B2, but they didn't work, so I went to both sticks in channel A or both sticks in channel B.

 

Tradesman1

Legenda in Aeternum
Try starting with one stick in slot 1, set it to spec in the BIOS, then raise the DRAM voltage + 0.06 (i.e. for 1.5 DRAM set to 1.56) and then find the CPU/NB voltage and set to 1.2, save, exit, shutdown and add the second stick in slot 3 (so you will be in A1 and B1) and give it a try
 
Solution

davidzeutzius

Commendable
Mar 15, 2016
3
0
1,510
Thanks for the information about the voltage, it was on a BIOS page only visable with the scroll bar, and I didn't notice the scroll bar until after you mentioned I should look for voltage. I'm going to wait a while before I try this fix, since I just got my computer fully operational a couple of weeks ago. But one thing I wasn't sure about, is VDDNB the value that should be changed for CPU/NB voltage ? its value starts at 1.175 thanks.