New RAM runs at +1CL higher unlike stated specs

[Kalinez]

Hey guys/galls.

Got new HyperX HX436C17PB3/16 2x16GB and as i reset bios to it's default settings and shift the ram to it's second profile (DOCP) @3600Mhz on CL-17-19-19, the OS CPU-Z shows it runing as 18-19-19 which is not exactly what i was looking for. If i switch the RAM timing from CL17 to CL16, CPU-Z shows 16-19-19 which i would say at this point that CPU-Z is showing correctly and there is something wrong with the memory?

Tried under the latest bios (released 2-3 days ago) and the one before it.

I've tried the ram on another system with Asus Crosshair VIII Hero Wifi and so far the ram is not in the QVL of this motherboard so maybe that's the reason the ram even didn't boot @ 3600Mhz (DOCP), only 2400Mhz  (default one). Tried the ram on 3rd system with gigabyte B450M D3SH and the ram was detected - runing again on 18-19-19 and few minutes afterwards i got BSOD few times in a row.

 

 ON my motherboard it runs as long as i don't put too much pressure on it, but if i start some serious  Premiere Pro sequence exporting - it might finish exporting, or might reboot due to BSOD (usually my exports last between 2-5 hours with hardware encoding).

Also getting BSOD with various errors (some of them pointing at ram, but you can't see those just by runing the system idle usually). 

The motherboard manufacturer told me that if the bios is detecting the ram runing at CL17 it doesn't matter what monitoring software shows but i'm keen to dissagree.

Currently i run on my old RAM 3x8GB from same brand but different models (2 modules Savage and 1 Predator) runing simultaneously @3000 with tiden timings and undervolted without a single BSOD in months so ........ i'm pretty sure it's the ram causing this mayhem but i wonder if this is normal to be seen higher timings under OS monitoring if everything is set to default in BIOS.

 

I'm thinking to RMA it, since HyperX support doesn't look much to help me (they answered once in 2 days waiting and it's a 3rd day waiting for their answer after i confirm that i followed their guides, compared to Asus answering me once every day)

 

Please share some advices, ideas, experiences - would be much appreciated.

 

Specs

Mobo: Asus Rog Strix B550-F Gaming

CPU: AMD Ryzen 5 5600x

GPU: MSI RTX 3090 Gaming X Trio

PSU: Seasonic Focus Platinum 850W (SSR-850PX) which i'm going to replace with Corsair HX1200 these days.

 

[Tristerin]

I know Ryzen, in the past, had issues with odd (not even) numbered CL - I wonder two things:  Is this still the case, and is your RAM on the QVL?  If not, is your BIOS up to date with current Agesa codes that provide more support for RAM?

[Kalinez]

2 minutes ago, Tristerin said:

I know Ryzen, in the past, had issues with odd (not even) numbered CL - I wonder two things:  Is this still the case, and is your RAM on the QVL?  If not, is your BIOS up to date with current Agesa codes that provide more support for RAM?

Yeah the ram is in QVL and the bios is the latest one v.1805 -  AMD AM4 AGESA V2 PI 1.2.0.0

I've been tryin different ram slots with both modules and every ram slot with single module.

 

So Ryzen had a problem with uneven CL timings? ......hmmm, i'm few days (max next week) away to RMA it or at least demand RMA.

[boggy77]

to enable odd number timings, you need to disable gear down mode.

however, if it works with C16, keep it at C16, that's even better

[Kalinez]

24 minutes ago, boggy77 said:

to enable odd number timings, you need to disable gear down mode.

however, if it works with C16, keep it at C16, that's even better

OK, I will check that later, but I'm pretty sure that the other system I tried the modules is at Gear Down Mode Disabled. Will check later and will let you know. 

[boggy77]

27 minutes ago, Kalinez said:

OK, I will check that later, but I'm pretty sure that the other system I tried the modules is at Gear Down Mode Disabled. Will check later and will let you know. 

why not just leave it at c16, if it's stable?

 

[Kalinez]

15 minutes ago, boggy77 said:

why not just leave it at c16, if it's stable?

 

Because it's unstable even at it's default settings

[Kalinez]

Aye @boggy77 & @Tristerin Gear down mode solved the question, and i guess that answers Tristerin's question about Ryzen still having issues with uneven timings.

Now, let's see how stable will they be, and if they are - i will try again to tighten the timins or clock the speed (or both) after i get my new PSU.

 

P.S. Apparantly Gear Down Mode is on AUTO by default which acts as ENABLED usually, so ..... i learn something new every day ^^

 

 Thank you guys, you're great!

[Tristerin]

1 minute ago, Kalinez said:

Aye @boggy77 & @Tristerin Gear down mode solved the question, and i guess that answers Tristerin's question about Ryzen still having issues with uneven timings.

Now, let's see how stable will they be, and if they are - i will try again to tighten the timins or clock the speed (or both) after i get my new PSU.

 

 Thank you guys, you're great!

Thank you for following up, lets us know how to help solve other folks issues in the future