After clean up Mb only can run single channel ram

ws2kcp

Honorable
Oct 3, 2013
13
0
10,510
After i clean up my pc and assembly back, i get a long sound beep. Do all the test finally found is ram problem. First try dual channel shirt between each other, can not start up pc. Then go for single ram test. Two ram test all 4 slot and found slot 1 and 2 can start up pc. Now i using slot 1 and 2 to run my pc. Use cpu-z -> memory, it display single channel. Before clean up i use slot 1 and 3 to run dual channel.

My question is how to become like that? How any solution for that instead of change motherboard?

My MB is Gigabyte H87 D3H.
Thank you.
 
Try some compressed air and blow out the DRAM slots, did the CPU cooler get moved at all? Might loosen it and snug it back down, not overly tight, too tight and it can throw the MC (memory controller off
 
You most likely inserted dirt in the slots. I usually use a vacuum cleaner to clean the slots, but a can of compressed air could also do the job.
 
Thank you for answer me, i think i found what is the problem. I had change a new heat sink, i think is too tight.