Issue: PC will not boot when RAM set to 3600, but is stable at 3200.

[Eeekster]

Hi,

I have the following system (3 years old) but have never been able to run the RAM at 3600 (it doesn't boot - either XMP or manual set to 3600) and crashes after a while at 3400, but stable at 3200:

The mobo: Gigabyte X470 Aorus Gaming 5 Wifi AMD X470
Ram: Team Group Dark Pro "8Pack Edition" 16GB (2x8GB) DDR4 PC4-28800C16 3600MHz
CPU: AMD Ryzen 5 Six Core 2600

It's not particularly bothered me, but now that I'm thinking of upgrading, I'd like to try and work out where the issue is, any thoughts?

Thanks!

 

[Eeekster]

Realised I should have added some data.. :

Ran memtest:
cycled through for an hour until hit 100% - no errors

CPUID says:
DRAM Freq: 1599.1
CL: 20
tRCD: 22
tRP: 22
tRAS: 53
tRC: 75

Which is weird as BIOS states:

CL: 15
tRCD: 15
tRP: 15
tRAS: 36
tRC: 50

 

[Eeekster]

OK, just had a thought... nothing like working things out as you go along...

Set XMP, and then manual set 32, and now BIOS and CPUID show:

CL: 16
tRCD: 16
tRP: 16
tRAS: 36
tRC: 53

So timings look correct.. not crashed yet.. but still at 32 rather than 36

 

[Eeekster]

Have you tried a small voltage increase?

The problem may just be your specific Rzyen 2600 cannot handle 3400/3600MHz. The memory controller is on the processor itself and is subject to the "silicon lottery" - some 2600's will handle 3600MHz just fine, some won't.

Thanks, I hadn't thought of that.

DRAM voltage increases to 1.35 with XMP - I'll find something to stress the system and see if it keels over, then maybe increase CPU voltage - then try at 3600 and repeat

 

[Eeekster]

Thanks, I've been doing some more reading off the back of comments, and it does appear to be the 2600 holding things up - this is partially good news, as it suggests my RAM is fine, so I can move it to my new system when I upgrade! (probably a 5600x).

I'll have more of a play, but satisfied it wont reach 3600 without some serious work/testing, and even then likely not.