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Unable to Post with Dual Channel RAM ALL OF A SUDDEN

Hello People , 

I hope everybody is doing fine in these times ? 

I need some help , am little bit confused AS the title said my PC won't boot with dual channel anymore 


to give you guys some context i have a Ryzen 5 3600,

 2 days ago i bought an Air Cooler Thermaltake UX200 , i took out the stock cooler ,  installed my new air cooler ( didn't forget the termal paste , neither the plastic protection below the air cooler lol ) , powered on all the rbg lights up even the 2x8 ram sticks , the air cooler works fine i can also hear my SSDs and hard drive running but it didn't post , so than i started trouble shooting as below 


 turned off everything , cut out the power cord , took out the CPU and checked it , am 90 % sure that there were no damaged or bent pin , put it back and power back on same issue ,

than i tried to boot with one stick of ram and it works fine , tried the second stick of ram , it also works , so no issues in both the Ram sticks , after that i tried to perform a CMOS reset and powered on with dual channel doesn't post , after that started again with one stick of ram entered bios setup and enabled XMP Profile , save and shut it down , put my rams on dual channel again won't boot 


as a last ressort , i put my 2x8 ram in single channel ( A1 and A2 Slots ) well my PC boots into windows and it recognize 16 Gb of RAM , so for now am using as it is .

as i used mostly for games and am not seeing any difference  


but i want to know what caused dual channel not working ? and if i won't have any issues in the future running it in a Single channel Config ? lets suppose : could just one bent pin in the CPU cause this ? 


i don't know if anyone gonna read this long text , lol but if you do could anyone advise and give me some infos as this case is stressing me out , this my 5th build over the years and this the first time something like this happened 



Thank you


BTW my config is :


Asus Prime B450m-a Plus 

Ryzen 5 3600 

Thermaletake UX200 Argb Air Cooler

2x8 GEIL Superluce 3200 Mhz 

Gigabyte GTX 1070 Gaming G1 OC rev2.0


Samsung 960 Evo NVME 256 Gb

two 1 TB 7200 RPM HDDs 

Corsair VS650 








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I didn't think about it , because they were working fine before but i'll give it a try and see 


Thank you 

i'll post the results this afternoon

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1 hour ago, Tonyboy said:

Hello updating the bios didn't work ....


Did you remove the RAM when swapping out your CPU cooler?

Did you get to try all four RAM slots?

Did you check the problematic RAM slot(s) for any bent / warp / damaged gold contact pins?


I am suspecting possibly:

  • Bent / damage CPU pin(s), affected the memory slots
  • Damaged DIMM (memory) slot, when removing / reinstalling RAM

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  1. Yes i did remove the RAMS 
  2. YES i did Try all four RAM Slots with both RAM sticks , if its one RAM it boots and also like i said above even having both my RAM Sticks in single channel (A1 , A2) slots it does boot too and recognize both of them ( am using the same PC to write here as you can see in the picture attached ) 
  3. Yes i did check , i even bought a brand new motherboard just to be sure it's not a RAM slot issues , am having the Same scenario as my answers above 


  • Bent / damage CPU pin(s), affected the memory slots : i'm thinking the same , but i checked my CPU twice , its seems proper , if its only a one pin case scenario i think i might have to check the CPU again using a Magnifying Glass or something like that 
  • Damaged DIMM (memory) slot, when removing / reinstalling RAM : as i explained above the Slots are fine and the RAM sticks too 


please if you have some knowledge am missing or something please share , 

and Thank you for taking the time 



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