Question PC wont boot with Dual Channel Memory only Single

Jan 19, 2020
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PC wont boot with dual memory sticks installed, only single. RMA'd the first motherboard and having the same issues with the second. Doesn't appear to be any bent pins on the CPU. Any ideas?

RAM is on the motherboard QVL, and it works perfectly in another build I did at the same time using Intel i-9900k/asus maximus hero wifi, so i know its good. Seems unlikely that the second motherboard would have the same problems.


Ryzen 9-3900x
ASUS ROG CROSSHAIR VIII Hero (wi-fi)
Corsair Vengeance Pro 32GB 2x16 3200MHZ
 

Nemesia

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Nov 6, 2019
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Installed in the good memory slots for dual channel A2 and B2?

What is the model number of your RAM?

Is it CMW32GX4M2C3200C16?

Because if it is this is not in your QVL list for your board.

CMK32GX4M2C3200C16 is in the list but not CMW32GX4M2C3200C16
 

Nemesia

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RAM is definitely on the motherboard QVL (Second to last listing under 3200MHZ)
What BIOS version are you on your ASUS ROG CROSSHAIR VIII Hero (wi-fi) ?

There are BIOS versions with "Improved Memory Compatibility".

Since the other system you tested the RAM where it was working not use the same motherboard.
 
Jan 19, 2020
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Version 1201 for the Crosshair VIII.

The other system is using version 1401, but assumed that was specific for that motherboard. ROG Maximus XI Hero (wi-fi)
 

Nemesia

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Version 1201 for the Crosshair VIII.

The other system is using version 1401, but assumed that was specific for that motherboard. ROG Maximus XI Hero (wi-fi)
So you tested the RAM in that other system and they were working fine. You tested each RAM stick in the system that doesn't work with both stick in A2 and B2 and they each work individually. When you add the second stick in B2 it doesn't work. You use the latest BIOS.

I'm sorry I'm out of ideas. To me it sounds like a bad board again if B2 doesn't work. I will leave this to someone else that might have something I missed.
 

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