Ram doesn’t work in dual channel

Oct 7, 2018
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I have x99a mpower mobo, 5820k, 2x g.skill ripjaws V 3200 mhz, everything was fine but in one moment seted up my bios to defaults it stopped working, i have checked every memory stick in single channel and it works fine. Socket is in a good condition. Is that possible that the problem caused by the northbridge?
 
Oct 7, 2018
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Tried, many times. Today i Just turned pc on with 2 mem sticks and it was working, but in cpu-z i saw only 8 gb
 
Oct 7, 2018
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The postcode A2 was 2 years ago when i bought mb while rebooting on stock cpu clock and ram i have done overlock and the problem was solved. Right now windows starts loading and freezes, so I think that my mobo is defected and i have to change it. But i need to know if the cpu can cause such problems?

 
Oct 7, 2018
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Already, many times both ram sticks work ok solo. This mobo is fucked up from the beginning. I rebuilt my pc 3 times, checked the socket, everything. I thought that socket can cause such shit but if i am not mistaking everything is good with it.
 
Oct 7, 2018
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Cpu and ram? Mb and cpu?

 
That's what I'm trying to find out right now. Although I think it may be the RAM. Before jumping to conclusions though, I got a few more questions.

According to your motherboard's manual, your two RAM sticks should be slotted on DIMM Slot 1 and DIMM Slot 5 - is this correct?
 
Oct 7, 2018
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Yep, they were in these slots like in the instruction for the dual channel, the worked for 2 years, i checked every Ram stick and both works in single channel
 


Try setting it at 1.35v.