Corsair RAM 4x8 on Ryzen 3600 B450 - BSOD on startup

[otreblA_SNAKE_ITA]

Hello there! 

Recently, after upgrading to 32GB RAM and adjusting the timings in the BIOS, I have started facing some BSODs with my PC when booting the system.
I have a Ryzen 3600 with a MSI B450 Tomahawk Max (latest drivers, bios and OS updates) and I have upgraded from 2x8 RAM slots (CMK16GX4M2B3000C15) to 4x8, by buying another Crucial 2x8 kit.

Since I don't mean overclocking, I have left my settings on "Auto" in the BIOS (of course I have enabled the XMP) but I have noticed that the SPD timings were definitely lower than my actual settings: CL was 16 instead of 15 and I had some higher timings around as well.

I have decided to fix this by manually switching my timings to the SPD ones.
1-I disabled the Gear Down mode, as it prevented me to set some timings, like CL15.
2-I manually changed my RAM timings (I also tried the 1T Command Rate).

This led to some instability, so while keeping the Gear Down Mode disabled I rolled back the other settings to "Auto".
Having the Gear Down Mode disabled helped the auto settings to be closer to the SPD: right now I am facing only one big difference between the SPD tRC (52) and the actual value (70), but the other timings are ok (15-17-17-35), which would be ok to me.

Nonetheless, sometimes I still face BSODs when I boot up the system and I'm not sure how to handle this.
I wrote to the MSI support but they suggested to use 4x8 kits instead of two different 2x8, but I hope there is a better solution around. 

Right now, while I'm writing this post, I have started wondering: CPUZ says that my Crucial banks on slots #1 and #2 are manufactured by SK Hynix, while the banks on the slot #3 and #4 are manufactured by Samsung. Do you think pairing the Hynix and Samsung on #1-#3 and #2-#4 may help? Or you have more or different suggestions to fix this?

Thank you very much! 😄

[Corsair Fer]

Mixing kits is always a bad idea unless you're willing to do some further fiddling with the system yourself.

Here is a good and simple watch regarding the topic - 

 

 

[otreblA_SNAKE_ITA]

On 12/20/2021 at 2:59 PM, Corsair Fer said:

Mixing kits is always a bad idea unless you're willing to do some further fiddling with the system yourself.

Here is a good and simple watch regarding the topic - 

 

 

First of all to thank you for your reply! I'm sorry for not replying earlier, but I've read your answer just today! 

My issue is a little bit different though, as I am using two identical corsair kits (CMK16GX4M2B3000C15), both composed by one SK Hynix and one Samsung module.
They run the same speed and same timings, so the negative odds should be minimum and I'm not even trying to stress them by overclocking them using the lowest possible timings!

Edited January 11, 2022 by otreblA_SNAKE_ITA

[LeDoyen]

the primary timings are identical. the loooong list of secondaries may not be, and they are usually the ones causing instability and BSODs when mixing kits

[otreblA_SNAKE_ITA]

22 hours ago, LeDoyen said:

the primary timings are identical. the loooong list of secondaries may not be, and they are usually the ones causing instability and BSODs when mixing kits

Oh no...I understand...What can I try to do?
I was thinking something like: enable GDM, check the secondary timings; disable GDM, check them again and adjust them accordingly? 

Note that at this moment all my timings are set on Auto in the BIOS!

EDIT: I also noted that MAYBE the BSOD are more likely to show up when I turn on or off my external audio card while booting up or booting down...I'm not sure 100% though!

Edited January 12, 2022 by otreblA_SNAKE_ITA

[LeDoyen]

your best bet honestly is to use only one kit of matched sticks. I never like to rely on luck to have a stable computer 😛

if you losen timings to have it work, you would have paid for performance you're not getting anyway.

 

[otreblA_SNAKE_ITA]

1 hour ago, LeDoyen said:

your best bet honestly is to use only one kit of matched sticks. I never like to rely on luck to have a stable computer 😛

if you losen timings to have it work, you would have paid for performance you're not getting anyway.

 

This is sad 😞 

[Corsair Fer]

LeDoyen is correct. 

We would only ever recommend you use a single paired kit in the system.  You are basically gambling on your system being stable, even if the part number for the kits is the same.