trying to get dual channel for !6 GB LPX Vengeance pair (8GB) but getting only single channel working fine

msmanliu14d202cb

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Working on the mobo: MSI B450 TOMAHAWK MAX, with CPU RYZEN 3 3200g onboard.
I installed fine 2 sticks VENGEANCE LPX 16GB (2 x 8GB) DDR4 DRAM 3200MHz on dimm A1 and A2 so i can see them UP in single channel mode and PC is booting fine.
All my attempts to use slot DIMM B2 as suggested for dual channel failed with 2 reboots and red CPU LED coming up and NO POST.
I suspected one of the ram stick was faulty but it appears they are ok on another motherboard.
Tryed to loose a bit the cooler after removing the CMOS battery checking the CPU PINS (none seemed bent) and reinstalling the CPU and cooler.
Anyway slots B1 and B2 appears not working fine (always when moving a stick on them got 2 PC reboots and red CPU LED coming up and NO POST).
Now system appear again fine with RAM installed in A1,A2 slots in single channel mode.
What else can I try?
have I to go straight for MOBO RMA ?
 
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msmanliu14d202cb

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I do not have a pair of ram available now.
I am thinking to buy another pair following QVL and do a further test, anyway opened a case with MSI will see what is their next advice.
me I tried to change RAM Voltage brining it to 1.4 V and that allowed to se at least the slot A1 coming UP but I have anyway a single channel not a dual channel in this way.
 
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citay

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Why do you make your font so small? Hard to read.

Anyway, if you have one module that works fine in one slot, you can do a BIOS update.

1) Get the newest BIOS file (top one): https://www.msi.com/Motherboard/support/B450-TOMAHAWK-MAX
2) Extract the file onto a USB stick.
3) Enter the BIOS, go to "M-FLASH" in the BIOS.
4) Once M-Flash (the updater) is loaded, it will show a list of your drives. Select the USB stick and select the file you extracted on there.
5) It will ask for confirmation and then update the BIOS. It's fully automatic from there.

Maybe this solves the problem, maybe not. But quite easy to try and doesn't cost anything.
 

msmanliu14d202cb

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thanks for the advice anyway BIOS was updated already to the last version, so I suspect some issue on the motherboard slots B1 & B2.
 

citay

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It could also be the CPU's fault, but i guess you'll see once you get a new board.
 

Hardcore Games™

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I use G.Skill Flare X which is sold to Ryzen users and it works fine with all of my motherboards and CPUs
 

msmanliu14d202cb

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Today tested the CPU , I installed it on a new MOBO ASROCK B450M PRO4 and works all fine in dual channel so it was not a bent pin but probably a cpu socket issue on the MSI motherboard,
well sometimes it can happen.
 
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