[SOLVED] SMT won’t enable - - I'm stuck with 8 cores and 8 threads ?

[Bent_pins]

specs:
Ryzen 7 7800x3D
ASRock B650i lightning
Windows 11

So a few days ago i realized that i have only been using 4 cores due to msconfig it was at 4 cores 8 threads then i removed the “number of cores” check and not it shows 8 cores and 8 threads. In ryzen master is shows SMT is disabled but my bios says that it is, i have also enabled cpu virtualization. Any suggestions?

 

[rgd1101]

latest motherboard bios?

 

[Bent_pins]

latest motherboard bios?

Yeah the one with the 3/3/25 release

 

[rgd1101]

is this a new build with fresh windows 11 install?

 

[Bent_pins]

is this a new build with fresh windows 11 install?

Not quite, i built in December I just update everything often, i did verify all of my windows files yesterday using "sfc /scannow" and "DISM /Online /Cleanup-Image /RestoreHealth"

 

[Bent_pins]

I want to clarify that I have the following settings on in bios: custom pbo curve of all core -30, pci virtualization, deep sleep, fast boot off, and xmp profile on (64gb DDR5 6800 cl 32)

P.S. I tried resetting bios to default and the issue persisted also tried with SMT off in bios and same result

 

[rgd1101]

what was the old system spec?

 

[Bent_pins]

same spec i built it in December, I just update software/firmware often even tried uninstalling and reinstalling chipset drivers same issue

 

[rgd1101]

so the windows 11 was fresh install on December?

 

[COLGeek]

What CPU cooler are you using? I wonder if over-tightened.

Does your BIOS properly identify the CPU?

 

[Bent_pins]

so the windows 11 was fresh install on December?

Yeah

 

[Bent_pins]

What CPU cooler are you using? I wonder if over-tightened.

one of the newer corsair aios I don't think its a seating issue or a pressure mount issue Ive reseated and repasted it a few times the past few days

 

[COLGeek]

Does your BIOS properly identify the CPU?

 

[SkyNetRising]

So a few days ago i realized that i have only been using 4 cores due to msconfig it was at 4 cores 8 threads then i removed the “number of cores” check and not it shows 8 cores and 8 threads.
In ryzen master is shows SMT is disabled but my bios says that it is, i have also enabled cpu virtualization. Any suggestions?

Can you show screenshots from?

Task Manager - Performance/CPU section and​

msconfig - Boot/Advanced options and​

BIOS - where it says SMT is enabled​

(upload to imgur.com and post link)

 

[Bent_pins]

Does your BIOS properly identify the CPU?

yeah thats what confuses me is I don't think this was an issue until i was testing things a few weeks after built probably jan of this year where I enabled 4 cores on boot via msconfig to speed up boot time but realized it was taking forever cause my memory was training, now that I turned that off SMT wont be recognized as on in windows

 

[Bent_pins]

Can you show screenshots from?

Task Manager - Performance/CPU section and​

msconfig - Boot/Advanced options and​

BIOS - where it says SMT is enabled​

(upload to imgur.com and post link)

I can do that when I'm home from work

 

[Bent_pins]

Can you show screenshots from?

Task Manager - Performance/CPU section and​

msconfig - Boot/Advanced options and​

BIOS - where it says SMT is enabled​

(upload to imgur.com and post link)

I want to note in bios there is no enable on the smt in bios there is just disable and auto i believe

 

[COLGeek]

Have you reset the BIOS fully to default at any point?

What does CPU-Z say about your CPU?

https://www.cpuid.com/softwares/cpu-z.html

From where did you purchase this CPU? There are some fakes apparently in the wild.

 

[Bent_pins]

Have you reset the BIOS fully to default at any point?

What does CPU-Z say about your CPU?

https://www.cpuid.com/softwares/cpu-z.html

I have yet to roll back the Bios to an earlier version but i did "reset all options to default" task manager/cpu-z/ryzen master/amd adrenaline/cinebench all show 8 cores 8 threads

 

[COLGeek]

I have yet to roll back the Bios to an earlier version but i did "reset all options to default" task manager/cpu-z/ryzen master/cinebench all show 8 cores 8 threads

From where did you purchase this CPU? There are some fakes apparently in the wild.

 

[Bent_pins]

From where did you purchase this CPU? There are some fakes apparently in the wild.

Amazon from the AMD retailer

 

[Bent_pins]

Thanks for all of the suggestions everyone I was able to figure out the issue, all I had to do was disable the option for "gaming mode" in bios even though that was the setting that was supposed to auto enable SMT and CCD it did the opposite

 

[CountMike]

Thanks for all of the suggestions everyone I was able to figure out the issue, all I had to do was disable the option for "gaming mode" in bios even though that was the setting that was supposed to auto enable SMT and CCD it did the opposite

"Gaming mode" In BIOS was supposed to disable one CCD in dual CCD in R9 x3D Ryzen because the added cache was only on one CCD. That made OS and games use cores without cache and lowered performance. It's useless for single CCD Ryzen and only disable SMT. Since then Windows 11 were "fixed" and properly recognize CCD with x3D cache, use only that one in games that support x3D and cores in CCD without it are used only when really needed.