Question Unable to run proper FCLK MEM/UCLK on B650 Tomahawk(newbie to mem tuning)

[reapzstar]

Hey there!

I've recently purchased a 2x24 6400 CL32 G.Skill kit and I wanted to tune it a little.
I currently have a 7800x3D till I'm able to get my hands on a 9800x3D.
I've tried setting FCLK to 2133 and UCLK to 1:1, but after booting into Windows I immediately got a BSOD.
I turned both back to Auto and I everthing worked properly, even restarted a couple times to make sure it was the problem and indeed it was, works flawlessly without it.
Quite frankly I am an absolute noob when it comes to memory tuning.
If someone could advise whether the motherboard is trash for these kinds of things or I'll just need to set proper SOC etc. voltages and everything will be fine, I'd really appreciate that.
I also wanted to try lowering my timings, but I backed out as I don't want to damage anything as I'm definitely lacking the proper knowledge.

Thank you in advance for any type of suggestion/help!

 

[CountMike]

Hey there!

I've recently purchased a 2x24 6400 CL32 G.Skill kit and I wanted to tune it a little.
I currently have a 7800x3D till I'm able to get my hands on a 9800x3D.
I've tried setting FCLK to 2133 and UCLK to 1:1, but after booting into Windows I immediately got a BSOD.
I turned both back to Auto and I everthing worked properly, even restarted a couple times to make sure it was the problem and indeed it was, works flawlessly without it.
Quite frankly I am an absolute noob when it comes to memory tuning.
If someone could advise whether the motherboard is trash for these kinds of things or I'll just need to set proper SOC etc. voltages and everything will be fine, I'd really appreciate that.
I also wanted to try lowering my timings, but I backed out as I don't want to damage anything as I'm definitely lacking the proper knowledge.

Thank you in advance for any type of suggestion/help!

Latest BIOS flashed? Which exact RAM model? Setting XMP or EXPO ?To set frequency manually, you have to also change many other memory settings including voltage.

 

[reapzstar]

Latest BIOS flashed? Which exact RAM model? Setting XMP or EXPO ?To set frequency manually, you have to also change many other memory settings including voltage.

Not the latest as last time I checked only a Beta one was out for the 9800x3D, so didn't update it yet.
G.SKILL 48GB KIT DDR5 6400MHz CL32 Trident Z5 RGB Black (XMP kit)

 

[CountMike]

Not the latest as last time I checked only a Beta one was out for the 9800x3D, so didn't update it yet.
G.SKILL 48GB KIT DDR5 6400MHz CL32 Trident Z5 RGB Black (XMP kit)

Doesn't matter if it's beta if it's only one for x3D, they have special AGESA only for them-

 

[Bob.B]

Not the latest as last time I checked only a Beta one was out for the 9800x3D, so didn't update it yet.
G.SKILL 48GB KIT DDR5 6400MHz CL32 Trident Z5 RGB Black (XMP kit)

If you enable xmp does it work?

 

[reapzstar]

If you enable xmp does it work?

Yep, I've been using it with XMP and it works great.
I guess I'd need to put higher voltages for the 1:1 and FCLK 2133 to work properly?

 

[Bob.B]

Yep, I've been using it with XMP and it works great.
I guess I'd need to put higher voltages for the 1:1 and FCLK 2133 to work properly?

With xmp enabled what speed is the ram running at?

 

[reapzstar]

With xmp enabled what speed is the ram running at?

6400 Mhz CL 32
Am I losing out on a lot of performance cause of not being able to set 1:1 and it defaulting to 1:2?
I'm only using the system for gaming

 

[CountMike]

6400 Mhz CL 32
Am I losing out on a lot of performance cause of not being able to set 1:1 and it defaulting to 1:2?
I'm only using the system for gaming

Not on Zen4 and 5.

 

[Bob.B]

6400 Mhz CL 32
Am I losing out on a lot of performance cause of not being able to set 1:1 and it defaulting to 1:2?
I'm only using the system for gaming

Where are you seeing 6400Mhz?

 

[reapzstar]

Where are you seeing 6400Mhz?

It the BIOS, in ZenTimings, HWInfo, everywhere.
I tried setting 1:1 with higher voltages, 1.25 on SOC, 1.4 VDD, 1.4 VDDIO as well as 1.4 VDDQ but it just wouldn't boot.
I don't really feel comfortable going higher on any of these voltages, just to be able to set 1:1, so I loaded in a default Hynix profile for 6000 30-38-38-96 and left it like that for now.
I guess the memory controller is just not good enough to be able to handle 6400 1:1.
Hopefully the 9800x3D will be a different story, once they finally ship one to me.