MSI B150M BAZOOKA not happy with 64 GB RAM

Joined
Sep 18, 2020
Messages
5
ok, I got a strange one here.

My system has been running flawless with 32 GB of RAM --> G.SKILL Ripjaws V Series 32GB (2 x 16GB) 288-Pin DDR4 SDRAM DDR4 2133 (PC4 17000)
I decided to buy 2 more sticks to max out the board and when I install them, the PC doesn't boot properly but the exact symptom is inconistent. My
first thought was bad memory, however I can take out the 2 existing sticks and just put in the 2 new sticks and it boots flawlessly. Actually I can use any 2 of the 4 sticks, and it works. It only happenes when all 4 are installed. The most common symptom was getting "Windows failed to start" screen with options to repair. I was thinking it could be Windows but its a fairly new install and again it boots fine with 2 sticks.
I then updated the BIOS on the motherboard to the lastest version and the first time the PC booted with the 4 sticks installed, it booted to Windows. I thought it was fixed! Then I walked away for 10 minutes and came back to a black screen with a blinking cursor like it rebooted and didn't POST. I was never able to get in Windows again with 4 sticks. Always boots with 2.

Any ideas? Thanks

System components:
CyberpowerPC Desktop Computer SYBER M VR350
MSI B150M Bazooka Motherboard - latest BIOS
Intel Core i7 6th Gen 6700K (4.00 GHz)
G.SKILL Ripjaws V Series 32GB (2 x 16GB) 288-Pin DDR4 SDRAM DDR4 2133 (PC4 17000)
MSI GeForce RTX 2070 DirectX 12 RTX 2070 ARMOR 8G OCV1 8GB 256-Bit GDDR6 PCI Express 3.0 x16 HDCP Ready Video Card
Acer Predator XB273K Pbmiphzx 27" UHD (3840 x 2160) IPS Monitor with NVIDIA G-SYNC
Samsung SSD 850 EVO 1TB
TOSHIBA DT01ACA200 2 TB HDD
Windows 10 Home
 
Last edited:

badboy2k

Well-known member
Global Moderator
Joined
Feb 11, 2012
Messages
9,177
more then likely there is a problem happening here of the 2 sets of memory you have are not liking each other. that sort of thing can happen even with the same exact memory as the memory chips on them may change what they put on them with different timings and sub timings leading to errors happening.

its ususally better to get a 4 stick kit or 2 exact same packs off the same shelf at the same time with serial numbers that are very close to each other like within 100 of the other as its way more likely they have the same exact chips on them.
 
Joined
Sep 18, 2020
Messages
5
I know what you mean. It is interesting I can take an old one and new one and they work fine together. It seems to only be an issue with using 4
 

citay

Active member
SERGEANT
Joined
Oct 12, 2016
Messages
813
I suspect two things: Your original RAM kit came out roughly in 2015. Any new kit you can buy now (you haven't said which) will use a vastly different PCB and ICs (memory chips) on it. The BIOS was never optimized for these new RAM models.

Secondly: Two modules is far less demanding than four modules. Four modules put additional stress on the memory controller, as well as worsening many electrical parameters that have to do with the layout of the memory traces on the PCB and how they are connecting to the slots, and the termination of the slots. This will lead to decreased signal quality, which can lead to stability problems in and of itself.

Two sticks work together fine, because your chipset limits RAM clocks to 2133 MHz (even with XMP selected and new modules). So your old modules won't actually limit the overall speed considerably, like they would on the Z170 for example (because most new modules you buy can go faster than that). But four sticks increases the stress for the memory system, and the mismatch of the sticks presumably is the tipping point, it doesn't run stable anymore.

If you can find an older kit of four 16 GB sticks on eBay or something, it will probably be quite cheap, and perfect for your board. You don't need anything faster than 2133 or 2400 MHz, it will be limited to 2133 anyway with your chipset.

But then you have four matching sticks which hopefully are on the QVL list for this board and CPU combination: https://www.msi.com/Motherboard/support/B150M-BAZOOKA.html#support-mem-4
Sort the table by size (click twice) and look for some of the certified 16GB kits with a checkmark on "4 DIMM" operation.
 
Joined
Sep 18, 2020
Messages
5
Thanks for the advice. The second theory is what I am leaning towards. I just tried 3 of them and it works perfectly. Maybe I will just "deal" with 48 GB lol
 

citay

Active member
SERGEANT
Joined
Oct 12, 2016
Messages
813
What you're experiencing with three modules is the following: Either two modules work in dual-channel mode and the third doesn't, or all three work in single-channel mode.

This will lower the stress on the controller again, and not worsen the electrical parameters as much. This is why it works.

If you want four modules and dual-channel mode to work, as i said, you should try with an older kit of four 16 GB modules, or two identical kits of 2x16, used from eBay or so. Look at the QVL list to find something appropriate from that time your board came out. This has the best chance to work.
 
Joined
Sep 18, 2020
Messages
5
Note: In case I was not clear before the new memory and old memory is the exact same brand/model, G.SKILL Ripjaws V Series 32GB (2 x 16GB) 288-Pin DDR4 SDRAM DDR4 2133 (PC4 17000)

Update: the 48GB did not work out. The PC would BSD randomly when put under a load. In order to further troubleshoot, I took out all of the known good memory and only put in the new 32GB. It would boot and work fine for a little bit and then it would also randomly BSD. I then found out about memtest86. I booted the PC from a USB stick and ran memtest86. It started erroring out immediately. Within 5 min, memtest86 actually said aborting because of too many errors. I turned the PC off and put the old memory back and ran memtest86 and it found 0 errors. I am going to RMA the memory and give it one more shot. I would love to get 64GB of this brand/model RAM working.

Is there any possibility that I am getting these errors on the memory because of the previously mentioned incompatabiliy of new memory chips versus old memory chips? I was not clear if you were saying the exact same make/model memory could be incompatible because of the manufacture date. I hope not.
 
Last edited:

citay

Active member
SERGEANT
Joined
Oct 12, 2016
Messages
813
If you buy the same model of RAM kit, but the second one 5 years later than the first one, they're bound to have changed the chips they use for those modules to something newer.

This can even happen when you are attempting to buy modules with the longest-running, most famous Samsung B-Die, as you can read here:

What happened? The new batch of these modules now use different chips, which are obviously more profitable for them, but perform worse. But new chips don't necessarily have to perform worse. They can, however, also have worse compatibility with old boards, because they don't know how to properly handle them. They don't have good initial values for them in the BIOS.

That's why i recommended twice that you look for used modules on eBay.
 
Joined
Sep 18, 2020
Messages
5
To wrap this thread up, the issue was simply bad memory. Did an RMA and got the replacement RAM today and now 64GB works flawlessly. My 5 year old PC does indeed run "newer" memory. lol
 
Top