EU ASRock Rack B450D4U-V1LQ5 mATX AM4

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ALinden

Member
Mar 21, 2025
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ALinden said:
There are ECC settings in the bios:
Advanced -> AMD CBS -> UMC Common Options -> DDR4 Common Options -> Common RAS -> ECC Configuration
Click to expand...
So it turns out these CBS settings are visible with the board that has 5500 Cezanne, but not visible on the board with 5700X Vermeer.
I have read that bios can be modded to enable hidden menus, but I have not done it myself. If anyone has pointers to instructions I would try it.
I have the ch341 programmer with correct adapter for flashing the chip.
 
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RolloZ170

Well-Known Member
Apr 24, 2016
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ALinden said:
So it turns out these CBS settings are visible with the board that has 5500 Cezanne, but not visible on the board with 5700X Vermeer.
Click to expand...
i found these CbsSetupDxe functions in the BIOS, one for each supported arch.type.
CbsSetupDxeZP
CbsSetupDxeRN
CbsSetupDxeRV
CbsSetupDxeSSP
CbsSetupDxeZP extracted looks like this
sorry, code and picture upload don't work at STH currently
 
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luckylinux

Active Member
Mar 18, 2012
766
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ALinden said:
So it turns out these CBS settings are visible with the board that has 5500 Cezanne, but not visible on the board with 5700X Vermeer.
I have read that bios can be modded to enable hidden menus, but I have not done it myself. If anyone has pointers to instructions I would try it.
I have the ch341 programmer with correct adapter for flashing the chip.
Click to expand...
Or you can use setup_var.efi as I wrote here to patch the Settings from UEFI Shell:

github.com

GitHub - luckylinux/aspm-troubleshooting: aspm-troubleshooting

aspm-troubleshooting. Contribute to luckylinux/aspm-troubleshooting development by creating an account on GitHub.
github.com github.com
 
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luckylinux

Active Member
Mar 18, 2012
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RolloZ170 said:
i doubt this works here, the options are suppressed.
Click to expand...
That would be the Point. Or you mean suppressed != hidden from the Menu ?

EDIT 1: Because I always assumed that when there are these SuppressIf Conditions, it's something that gets evaluated when the BIOS Menu is rendered (graphically)
 
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luckylinux

Active Member
Mar 18, 2012
766
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ALinden said:
So it turns out these CBS settings are visible with the board that has 5500 Cezanne, but not visible on the board with 5700X Vermeer.
I have read that bios can be modded to enable hidden menus, but I have not done it myself. If anyone has pointers to instructions I would try it.
I have the ch341 programmer with correct adapter for flashing the chip.
Click to expand...
But let me understand ... so ECC is NOT working (or at least the ECC Function is not Enabled) on the 5700X :oops: ?

That's an absolute BUMMER. It's basically no ECC Support at all then with the latest AM4 Gen Ryzen :rolleyes:.
 
A

ALinden

Member
Mar 21, 2025
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Yes ECC is NOT working for me at the moment with 5700X and yes exactly - big big BUMMER.
I tried with a Samsung M391 module, a SKhynix module and with Goodram modules.
 
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luckylinux

Active Member
Mar 18, 2012
766
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ALinden said:
Yes ECC is NOT working for me at the moment with 5700X and yes exactly - big big BUMMER.
I tried with a Samsung M391 module, a SKhynix module and with Goodram modules.
Click to expand...
Did you try several BIOS Versions ? We might need to contact ASRock otherwise. This is VERY BAD !

EDIT 1: @ALinden, which BIOS Version did you use ? L2.12 ?
 
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luckylinux

Active Member
Mar 18, 2012
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I just got confirmation from NOCTUA that the NH-L12 S1 Ghost Edition CPU Cooler is NOT compatible with this Board. Well, unless you don't mind doing the Fit like I tried. I just hope I didn't damage one DIMM Module or bent the VRM Heatsink in the Process :eek: .

They just created the Non-Compatible List for this Motherboard:

ASRock Rack B450D4U-V1L | Motherboard Compatibility | Noctua Compatibility Centre

Socket: AM4
ncc.noctua.at ncc.noctua.at

And of course Amazon also had to **** up my Order so I'm not even getting the Thermalright AXP120-X67 Cooler I ordered as an alternative in the Meantime.

Shipping these Days turned into a big Nightmare with everybody messing up the Delivery Schedule o_O.
 
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RolloZ170

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Apr 24, 2016
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ALinden said:
Yes ECC is NOT working for me at the moment with 5700X and yes exactly - big big BUMMER.
I tried with a Samsung M391 module, a SKhynix module and with Goodram modules.
Click to expand...
CBS Setup->Common RAS->ECC Configuration
Code: 
VarStore Guid: 3A997502-647A-4C82-998E-52EF9486A247, VarStoreId: 0x5000, Size: 0x5A8, Name: "AmdSetup"

Form FormId: 0x7024, Title: "ECC Configuration"
        Subtitle Prompt: "ECC Configuration", Help: "", Flags: 0x0
        End
        Subtitle Prompt: "", Help: "", Flags: 0x0
        End
        OneOf Prompt: "DRAM ECC Symbol Size", Help: "DRAM ECC Symbol Size (x4/x8) - UMC_CH::EccCtrl[EccSymbolSize]", QuestionFlags: 0x10, QuestionId: 0x8A, VarStoreId: 0x5000, VarOffset: 0x90, Flags: 0x10, Size: 8, Min: 0x0, Max: 0xFF, Step: 0x0
            OneOfOption Option: "x4" Value: 0
            OneOfOption Option: "x8" Value: 1
            OneOfOption Option: "Auto" Value: 255, Default
        End
        OneOf Prompt: "DRAM ECC Enable", Help: "Use this option to enable / disable DRAM ECC. Auto will set ECC to enable.", QuestionFlags: 0x10, QuestionId: 0x8B, VarStoreId: 0x5000, VarOffset: 0x91, Flags: 0x10, Size: 8, Min: 0x0, Max: 0xFF, Step: 0x0
            OneOfOption Option: "Disabled" Value: 0
            OneOfOption Option: "Enabled" Value: 1
            OneOfOption Option: "Auto" Value: 255, Default
        End
        OneOf Prompt: "DRAM UECC Retry", Help: "Use this option to enable / disable DRAM UECC Retry.", QuestionFlags: 0x10, QuestionId: 0x8C, VarStoreId: 0x5000, VarOffset: 0x92, Flags: 0x10, Size: 8, Min: 0x0, Max: 0x1, Step: 0x0
            OneOfOption Option: "Enabled" Value: 1
            OneOfOption Option: "Disabled" Value: 0, Default
        End
    End
 
A

ALinden

Member
Mar 21, 2025
36
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I tried changing the "ECC Enable" setting today with setup_var.efi.
Different CbsSetupDxe use different offset for the ECC enable setting.
I am not sure which CbsSetupDxe is used with Vermeer 5700X.
(It seems that Cezanne 5500 uses RN. UMC Common Options are supressed with SSP and ZP and not supressed with RN and RV. So most likely Vermeer uses ZP).
So I just set all to enable with:
AmdSetup:0x91=0x01
AmdSetup:0xE2=0x01
AmdSetup:0x11B=0x01
AmdSetup:0xF1=0x01

And nothing. Still ECC not active (dmidecode dsplays: "Error Correction Type: None".)

Then I tried the same with bios 2.09 (Just swapped the chip from another board. 2.09 uses same offsets) - Same result

I then loaded bios defaults and took a look at the default ECC enable settings:
2.09:
AmdSetup:0x91=0x00
AmdSetup:0xE2=0xFF
AmdSetup:0x11B=0xFF
AmdSetup:0xF1=0x00

2.12:
AmdSetup:0x91=0x01
AmdSetup:0xE2=0xFF
AmdSetup:0x11B=0xFF
AmdSetup:0xF1=0x00

If Vermeer uses ZP (offset 0xF1) then the defaults are to disable ECC!
And manually enabling it will not activate ECC.

Is anyone else testing/using ECC memory?
Are there any other settings that need to be set to specific value for ECC activation?

@luckylinux So you can't test anything because no coolers at the moment for your 5700X?
 
R

RolloZ170

Well-Known Member
Apr 24, 2016
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ALinden said:
If Vermeer uses ZP (offset 0xF1) then the defaults are to disable ECC!
And manually enabling it will not activate ECC.
Click to expand...
AMD Ryzen 7 2700X, ... Stepping: ZP-B2
AMD Ryzen 5 4500, ... Stepping: RN-A1, Renoir-X Zen2
AMD Ryzen 5 2400B, ... Stepping: RV-B0

looks to me Ryzen 5000 ( VMR ) do NOT have a CBS Setup Dxe file

ZP ECC configuration
Code: 
    Form FormId: 0x7042, Title: "ECC Configuration"
        Subtitle Prompt: "ECC Configuration", Help: "", Flags: 0x0
        End
        Subtitle Prompt: "", Help: "", Flags: 0x0
        End
        OneOf Prompt: "DRAM ECC Symbol Size", Help: "DRAM ECC Symbol Size (x4/x8) - UMC_CH::EccCtrl[EccSymbolSize]", QuestionFlags: 0x10, QuestionId: 0x8B, VarStoreId: 0x5000, VarOffset: 0xF0, Flags: 0x10, Size: 8, Min: 0x0, Max: 0xFF, Step: 0x0
            OneOfOption Option: "x4" Value: 0
            OneOfOption Option: "x8" Value: 1
            OneOfOption Option: "Auto" Value: 255, Default
        End
        OneOf Prompt: "DRAM ECC Enable", Help: "Use this option to enable / disable DRAM ECC. Auto will set ECC to enable.", QuestionFlags: 0x10, QuestionId: 0x8C, VarStoreId: 0x5000, VarOffset: 0xF1, Flags: 0x10, Size: 8, Min: 0x0, Max: 0xFF, Step: 0x0
            OneOfOption Option: "Disabled" Value: 0
            OneOfOption Option: "Enabled" Value: 1
            OneOfOption Option: "Auto" Value: 255, Default
        End
    End
 
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L

luckylinux

Active Member
Mar 18, 2012
766
185
43
ALinden said:
@luckylinux So you can't test anything because no coolers at the moment for your 5700X?
Click to expand...
Pretty much so yeah. Amazon ****** up the delivery of the Thermalright AXP120-X67 Cooler (they say they Shipped, but Tracking shows no updates since 2024-04-04). I ordered 2 other of the same (Thermalright AXP120-X67) but these will most likely come on Monday only :( .

I could do a Test with only 1 DIMM, as in one Orientation the NOCTUA NH-L12 S1 Ghost Edition fits, provided you do NOT install the DIMM closest to the CPU.

You are using a weird Syntax However.
Take a look at e.g. aspm-troubleshooting/patching/ASUS/P9DWS/2402/patch.nsh at main · luckylinux/aspm-troubleshooting

It should be something like (NOT for this Motherboard Though)
Code: 
setup_var.efi Setup(0x1):0x9D=3
 
L

luckylinux

Active Member
Mar 18, 2012
766
185
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RolloZ170 said:
AMD Ryzen 7 2700X, ... Stepping: ZP-B2
AMD Ryzen 5 4500, ... Stepping: RN-A1, Renoir-X Zen2
AMD Ryzen 5 2400B, ... Stepping: RV-B0

looks to me Ryzen 5000 ( VMR ) do NOT have a CBS Setup Dxe file

ZP ECC configuration
Code: 
    Form FormId: 0x7042, Title: "ECC Configuration"
        Subtitle Prompt: "ECC Configuration", Help: "", Flags: 0x0
        End
        Subtitle Prompt: "", Help: "", Flags: 0x0
        End
        OneOf Prompt: "DRAM ECC Symbol Size", Help: "DRAM ECC Symbol Size (x4/x8) - UMC_CH::EccCtrl[EccSymbolSize]", QuestionFlags: 0x10, QuestionId: 0x8B, VarStoreId: 0x5000, VarOffset: 0xF0, Flags: 0x10, Size: 8, Min: 0x0, Max: 0xFF, Step: 0x0
            OneOfOption Option: "x4" Value: 0
            OneOfOption Option: "x8" Value: 1
            OneOfOption Option: "Auto" Value: 255, Default
        End
        OneOf Prompt: "DRAM ECC Enable", Help: "Use this option to enable / disable DRAM ECC. Auto will set ECC to enable.", QuestionFlags: 0x10, QuestionId: 0x8C, VarStoreId: 0x5000, VarOffset: 0xF1, Flags: 0x10, Size: 8, Min: 0x0, Max: 0xFF, Step: 0x0
            OneOfOption Option: "Disabled" Value: 0
            OneOfOption Option: "Enabled" Value: 1
            OneOfOption Option: "Auto" Value: 255, Default
        End
    End
Click to expand...
Shouldn't we "just" ask ASRock then ? Or they will just tell us to **** off ?

I don't know how to go through the different settings without exporting manually everything one by one to be honest.

setup_var.efi is an Interesting Tool, provided you find and export the correct Setup Section ...
 
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luckylinux

Active Member
Mar 18, 2012
766
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RolloZ170 said:
AMD Ryzen 7 2700X, ... Stepping: ZP-B2
AMD Ryzen 5 4500, ... Stepping: RN-A1, Renoir-X Zen2
AMD Ryzen 5 2400B, ... Stepping: RV-B0

looks to me Ryzen 5000 ( VMR ) do NOT have a CBS Setup Dxe file

ZP ECC configuration
Code: 
    Form FormId: 0x7042, Title: "ECC Configuration"
        Subtitle Prompt: "ECC Configuration", Help: "", Flags: 0x0
        End
        Subtitle Prompt: "", Help: "", Flags: 0x0
        End
        OneOf Prompt: "DRAM ECC Symbol Size", Help: "DRAM ECC Symbol Size (x4/x8) - UMC_CH::EccCtrl[EccSymbolSize]", QuestionFlags: 0x10, QuestionId: 0x8B, VarStoreId: 0x5000, VarOffset: 0xF0, Flags: 0x10, Size: 8, Min: 0x0, Max: 0xFF, Step: 0x0
            OneOfOption Option: "x4" Value: 0
            OneOfOption Option: "x8" Value: 1
            OneOfOption Option: "Auto" Value: 255, Default
        End
        OneOf Prompt: "DRAM ECC Enable", Help: "Use this option to enable / disable DRAM ECC. Auto will set ECC to enable.", QuestionFlags: 0x10, QuestionId: 0x8C, VarStoreId: 0x5000, VarOffset: 0xF1, Flags: 0x10, Size: 8, Min: 0x0, Max: 0xFF, Step: 0x0
            OneOfOption Option: "Disabled" Value: 0
            OneOfOption Option: "Enabled" Value: 1
            OneOfOption Option: "Auto" Value: 255, Default
        End
    End
Click to expand...
In UEFITool if you search for VMR then CbsSetupDxeSSP (SSP) Comes up ;)
 
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luckylinux

Active Member
Mar 18, 2012
766
185
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@ALinden

If it's SSP like my simple Search seems to suggest, it should be these Parameters
Code: 
        Form FormId: 0x7025, Title: "ECC Configuration"
                Subtitle Prompt: "ECC Configuration", Help: "", Flags: 0x0
                End
                Subtitle Prompt: "", Help: "", Flags: 0x0
                End
                OneOf Prompt: "DRAM ECC Symbol Size", Help: "DRAM ECC Symbol Size (x4/x8/x16) - UMC_CH::EccCtrl[EccSymbolSize16, EccSymbolSize]", QuestionFlags: 0x10, QuestionId: 0xB1, VarStoreId: 0x5000, VarOffset: 0x11A, Flags: 0x10, Size: 8, Min: 0x0>
                        OneOfOption Option: "x4" Value: 0
                        OneOfOption Option: "x8" Value: 1
                        OneOfOption Option: "x16" Value: 2
                        OneOfOption Option: "Auto" Value: 255, Default
                End
                OneOf Prompt: "DRAM ECC Enable", Help: "Use this option to enable / disable DRAM ECC. Auto will set ECC to enable.", QuestionFlags: 0x10, QuestionId: 0xB2, VarStoreId: 0x5000, VarOffset: 0x11B, Flags: 0x10, Size: 8, Min: 0x0, Max: 0xFF, >
                        OneOfOption Option: "Disabled" Value: 0
                        OneOfOption Option: "Enabled" Value: 1
                        OneOfOption Option: "Auto" Value: 255, Default
                End
                OneOf Prompt: "DRAM UECC Retry", Help: "Use this option to enable / disable DRAM UECC Retry.", QuestionFlags: 0x10, QuestionId: 0xB3, VarStoreId: 0x5000, VarOffset: 0x11C, Flags: 0x10, Size: 8, Min: 0x0, Max: 0xFF, Step: 0x0
                        OneOfOption Option: "Auto" Value: 255, Default
                        OneOfOption Option: "Enabled" Value: 1
                        OneOfOption Option: "Disabled" Value: 0
                End
        End
So probably something like
Code: 
setup_var.efi AmdSetup(0x5000):0x11B=0x1
EDIT 1: I checked on BIOS L2.12 disassembled, NOT the L2.09 that I have currently on my System.

EDIT 2: if you change ANY Settings in the BIOS after running setup_var.efi, you might need to re-apply your Changes.

@ALinden: Did you try with BIOS L2.09 for real, or did you just try disassembling it ?

EDIT 3: maybe you could also try to enable the other Settings:
Code: 
setup_var.efi AmdSetup(0x5000):0x11C=0x1

BTW Not sure what to make of the Flags Parameter, maybe there is something else there too ... -> Nevermind, also supermicro has that apparently
 
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chlastakov

chlastakov

Active Member
Jan 26, 2025
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Czech Republic
Guys, I'm lost when I read what you talking about :)

I suppose you are somehow activating hidden BIOS settings? How you do it? How you searching for that options? Can you please point me right direction how to start with these things?
 
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