Question RAM or system issues?

[MATEO123]

Hello,
I've recently upgraded from 2x8GB of DDR4 RAM in dual-channel to 4x8 GB of RAM in dual channel.
First I must say that kits are not the same, please don't judge me, budget issues plus lockdown kind of forced me to only working store in the vicinity.
First kit is G.Skill Aegis F4-3000C16-8GISB, and new kit is Corsair Vengeance LPX CMK16GX4M2B3200C16.
Rest of the system is:
MSI X470 Gaming plus max
AMD Ryzen5 2600
MSI Radeon RX 5500 XT
Samsung SSD 850 Evo 250GB boot drive
plus I have 2 more SSDs and 2 more HDDs in the system for a combined 4 TB of memory for programs and games (not all of them are connected all the time).

Now the problems:
After inserting new RAM, everything went well for a couple of days, PC was working as I hoped it will, RAM was set in XMP profile 1 at 2933 MHZ, I had no issues with programs, games, etc, and then, windows update came and nahimic companion update came.
after that - system crashes came (that's why I am in doubt is this system or RAM error)

I got all kinds of stop codes at booting or after 10 seconds of working PC, some of them were (I don't remember all):
0xc00021a
0xc00000f
0xc000221
irql_not_less_or_equal
and many others.
What I did at that time, just to make the system stable enough to google what were the problems is:
disabled driver signature enforcement - as that was the only way to get actually system to boot.
Downloaded and ran memtest86, which failed immediately because of too many errors, tried 2nd time, same result.
entered BIOS, disabled XMP, set manually to 3000 MHz, manually set timings to 16-18-18-18-36, entered safe mode and in CMD done SFC scannow and DISM CheckHealth, ScanHealth, RestoreHealth.
That got me enough to actually boot normally.
System booted but not stable, so I did Prime95 stress test and after 2 hours found 1 error, I've done memtest86 and first test (4 passes) had something like 400 errors combined.
After that, even though PC booted, and worked for 12 hours, I had no faith in its stability, tried playing some DotA2, game crashed 3 times in 5 minutes so I went and downloaded all
AMD drivers for chipset, downloaded and flashed BIOS (latest), ran Prime95 for couple of hours, 0 errors, went to memtest86, 1st test failed at test6 because of too many errors, went back to BIOS, noticed that timings and voltage were not what I liked (probably after flashing BIOS it changed), set it back to 3000MHz, 16-18-18-18-36, the voltage to 1,35V, ran memtest86 again and after 8 hours I had combined 10 errors after 4 passes, all in test7, most of them in the same place.


I am out of ideas now. Do I keep it like this and pray that it lasts or what?

Any help is much appreciated, as I really do not know what to do next.

 

[Colif]

First kit is G.Skill Aegis F4-3000C16-8GISB, and new kit is Corsair Vengeance LPX CMK16GX4M2B3200C16.

running 2 different makes of sticks at same time in XMP is going to cause errors. Running 2 different sets can lead to errors without XMP, timings of ram might not be exact enough to match and not cause bsod

I've done memtest86 and first test (4 passes) had something like 400 errors combined.

Only error count you want in memtest is 0
run it one stick at a time, up to 4 passes. Only error count you want is 0, any higher could be cause of the BSOD. Remove/replace ram sticks with errors.

 

[MATEO123]

running 2 different makes of sticks at same time in XMP is going to cause errors. Running 2 different sets can lead to errors without XMP, timings of ram might not be exact enough to match and not cause bsod


Only error count you want in memtest is 0
run it one stick at a time, up to 4 passes. Only error count you want is 0, any higher could be cause of the BSOD. Remove/replace ram sticks with errors.

Yeah, that's why I disabled A-XMP, and manually set timings to default factory.
everything worked perfect, games ran, programs ran, Chrome ran with 80 tabs open, no issues...

What happened now is - new windows update came, I clicked update and shut down, as I had to go out, waited for the system to update and PC to shut down, and went outside.

when I came back, tried to turn on PC, aaaaaand BSOD, PC would not boot, stop code 0x00000f, disable driver signature enforcement 0xc000221 didn't work , memtest again, failed at test6, went back to BIOS, settings were as I left them, tried to boot once again, BSOD -> disable driver signature enforcement, PC booted.

that is the reason why I am not sure the fault lies at RAM alone because both times this happened was the same second I downloaded and installed windows update... And it confuses the hell out of me...