UEFI Settings for ASRock B550 Phantom Gaming-ITX/ax
Last modified
UEFI Settings for ASRock B550 Phantom Gaming-ITX/ax
I’ve had a scrap of paper on my desk for about 6 months now that lists the approximate changes I made to the default settings in my motherboard’s firmware. Today, I updated the firmware to version 2.20 and followed these steps again. I decided it’s time …
I’ve had a scrap of paper on my desk for about 6 months now that lists the approximate changes I made to the default settings in my motherboard’s firmware. Today, I updated the firmware to version 2.20 and followed these steps again. I decided it’s time to get rid of the paper version and instead put the steps here.
Everyday UEFI Settings
- Exit > Load UEFI BIOS Defaults
- Exit > Save Changes and Exit
- Boot > CSM > CSM > Disabled
- Exit > Save Changes and Exit (the PCIe Above 4G Decoding and Re-Sizable BAR and secure boot are locked out until CSM is disabled)
- OC Tweaker > Load XMP Setting > as appropriate for installed RAM (likely not “Disabled”)
- Advanced > PCI Configuration > Above 4G Decoding > Enabled
- Advanced > PCI Configuration > Re-Size BAR Support > Enabled
- Advanced > Onboard Devices Configuration > RGB LED On/Off > Off
- Advanced > AMD PBS > PCIe x16 Bus Interface > as appropriate for installed GPU (likely “Gen3” or “Gen4”)
- Security > Secure Boot > Secure Boot Mode > Standard > confirm “Yes”
- Security > Secure Boot > Secure Boot > Enabled
- Boot > Full Screen Logo > Disabled
- Exit > Save Changes and Exit
Also, I’ve noticed that if you save any “User Default Profiles,” they can’t be deleted. Even a “Load UEFI BIOS Defaults” or a firmware flash didn’t remove old ones I had there. Possibly a full CMOS clear with the jumper would do it, but I haven’t tested that.
Undervolt the CPU
Optionally, undervolt the CPU for lower thermal output with Precision Boost Overdrive 2:
Enter the Precision Boost Overdrive menu by choosing AMD Overclocking > Accept > Precision Boost Overdrive. Then, perform the following steps.
- Precision Boost Overdrive > Advanced
- PBO Limits > Disable
- Curve Optimizer > Curve Optimizer > All Cores
- Curve Optimizer > All Core Curve Optimizer Sign > Negative
- All Core Curve Optimizer Magnitude > as appropriate (30 works for my Ryzen 5 5600X, but see here for further discussion)
Modifications
- : Add headings and new section for undervolting.
- : Fix Markdown formatting error that was causing a spurious blockquote.