[SOLVED] B450 Tomahawk max Ram issues

[kmass]

I am having RAM issues with a recent build. When using slots a2/b2 windows and the bios are showing both sticks as installed, but only 1/2 available. When switching the ram to slots b1/2 the system would not post. However, when I switched the ram to a1/a2 the system read the full 16gb as available.

Is there anything I can do to fix this?

System:
CPU: Ryzen 5 1600AF
MOBO: MSI b450 tomahawk MAX (obviously)
-BIOS version 350
-CMOS reset preformed already
RAM: Tried both G.skill ripjaw 3600 and pny xlr8 3200 with the same issue,

 

[Isaacuno]

If you take and google the product number of the RAM (it should just be on the sticker on the side of them or the box they came in) you should be able to find out motherboard compatibility on the manufacturer's website. The earlier generations of Ryzen weren't compatible with a whole lot of memory. I also had a problem when i build my computer using a ryzen 1200, but Geil was willing to swap out my memory for one that was compatible.
hope this helps

 

[Flayed]

Not sure I understand the problem. You have 2 sticks of ram and they are only recognised when installed in slots a1 and a2?

 

[kmass]

They show up in bios and windows (16gb phyiscal in windows) but only show up as 7.95gb avail in A2B2, and the full kit shows up as available in A1A2.

 

[Flayed]

which slots does it say to install 2 sticks in your motherboard manual?

 

[sizzling]

If you run at stock 2400mhz do you have the same problem?

 

[boju]

2nd(A2) & 4th(B2) from cpu are the correct slots. If nothing is helping, it is possible there is a bent cpu pin or too much heatsink pressure. A couple reasons for nonfunctional primary slots in dual channel.

 

[mitch074]

I had the same problem recently on ram sticks when running them with xmp settings. Overvolting them by 0.1V (1.36 instead of 1.35) solved it.

 

[kmass]

If you run at stock 2400mhz do you have the same problem?

Yes. The issues originally arose under stock speeds and persisted when running the xmp profile.

 

[kmass]

2nd(A2) & 4th(B2) from cpu are the correct slots. If nothing is helping, it is possible there is a bent cpu pin or too much heatsink pressure. A couple reasons for nonfunctional primary slots in dual channel.

Recommend loosening the cpu fan first and then checking for bent pins if all else fails?

 

[boju]

Recommend loosening the cpu fan first and then checking for bent pins if all else fails?

Yeah mate. Hoping for the best.

 

[kmass]

Yeah mate. Hoping for the best.

One bent pin was the culprit. I was able to get it back into place and everything is running as it should now.