Unlock Epyc EDC on boards other than H12 possible?/Using PBO on Epyc possible?

[akkk44]

As this image shows (and confirmation from some owners), the Supermicro H12SSL-i mother does have an option to change the EDC limit.
However, as I download the BIOS of H12SSL-i and examine it with AMIBCP tool, I found this:

Most option matched up with the photo, but the EDC and EDC Platform Limit are disappeared.

By searching the BIOS strings I found 2 matches of EDC Platform Limit, but I can't locate them.

This keeps me wondering: is it possible to make the EDC option visible on other Epyc boards with BIOS Modding?

Side note: The Supermicro and Tyan BIOS I examine all have hidden XFR enhancement menu which includes PBO and many more. Would these options work if I unhide and configure them? Would they fry my machine?

A big mystery here……

 

[Wasmachineman_NL]

@RolloZ170

 

[RolloZ170]

Side note: The Supermicro and Tyan BIOS I examine all have hidden XFR enhancement menu which includes PBO and many more.

in some BIOS you can go to these options tree and need to accept the risk: after Accepted the risk you can go in and the options are visible.

Would these options work if I unhide and configure them? Would they fry my machine?

sure a misconfiguration can result in anything. for that reason you have to Accept before go on those option-trees.

 

[Wasmachineman_NL]

PBO on Epycs sounds ****ing ridiculous though, what PPT/EDC will it set if you enable PBO?

 

[RolloZ170]

you can do some changes without flashing BIOS (modd and flash don't work on H12)
with RU.efi or other similar tools.

0xEFE7     Form: Declined, Form ID: 0x704D {01 86 4D 70 33 03}
0xEFED         Subtitle: Declined {02 87 33 03 00 00 00}
0xEFF4         End {29 02}
0xEFF6         Subtitle:  {02 87 02 00 00 00 00}
0xEFFD         End {29 02}
0xEFFF     End Form {29 02}
0xF001     Form: Accepted, Form ID: 0x704E {01 86 4E 70 34 03}
0xF007         Subtitle: Accepted {02 87 34 03 00 00 00}
0xF00E         End {29 02}
0xF010         Subtitle:  {02 87 02 00 00 00 00}
0xF017         End {29 02}
0xF019         Setting: Precision Boost Overdrive, Variable: 0x171 {05 91 60 03 61 03 08 01 00 50 71 01 10 10 00 0F 00}
0xF02A             Option: Auto, Value: 0xF (default) {09 07 14 00 10 00 0F}
0xF031             Option: Disable, Value: 0x0 {09 07 46 00 00 00 00}
0xF038             Option: Enable, Value: 0x1 {09 07 45 00 00 00 01}
0xF03F             Option: Manual, Value: 0x2 {09 07 29 00 00 00 02}
0xF046         End of Options {29 02}
0xF048         Suppress If: {0A 82}
0xF04A             Variable 0x108 equals 0x2 {12 86 08 01 02 00}
0xF050                 Not {17 02}
0xF052             End {29 02}
0xF054             Numeric: PPT Limit (612238998066326-612238998066326) , Variable: 0x172 {07 9A 62 03 63 03 09 01 00 50 72 01 10 12 00 00 00 00 FF FF 00 00 00 00 00 00}
0xF06E                 Default: 32 Bit, Value: 0x0 {5B 09 00 00 02 00 00 00 00}
0xF077             End {29 02}
0xF079         End If {29 02}
0xF07B         Suppress If: {0A 82}
0xF07D             Variable 0x108 equals 0x2 {12 86 08 01 02 00}
0xF083                 Not {17 02}
0xF085             End {29 02}
0xF087             Numeric: TDC Limit (612238998066326-612238998066326) , Variable: 0x176 {07 9A 64 03 65 03 0A 01 00 50 76 01 10 12 00 00 00 00 FF FF 00 00 00 00 00 00}
0xF0A1                 Default: 32 Bit, Value: 0x0 {5B 09 00 00 02 00 00 00 00}
0xF0AA             End {29 02}
0xF0AC         End If {29 02}
0xF0AE         Suppress If: {0A 82}
0xF0B0             Variable 0x108 equals 0x2 {12 86 08 01 02 00}
0xF0B6                 Not {17 02}
0xF0B8             End {29 02}
0xF0BA             Numeric: EDC Limit (612238998066326-612238998066326) , Variable: 0x17A {07 9A 66 03 67 03 0B 01 00 50 7A 01 10 12 00 00 00 00 FF FF 00 00 00 00 00 00}
0xF0D4                 Default: 32 Bit, Value: 0x0 {5B 09 00 00 02 00 00 00 00}
0xF0DD             End {29 02}
0xF0DF         End If {29 02}
0xF0E1         Setting: Precision Boost Overdrive Scalar, Variable: 0x17E {05 91 68 03 69 03 0C 01 00 50 7E 01 10 10 00 0F 00}
0xF0F2             Option: Auto, Value: 0xF (default) {09 07 14 00 10 00 0F}
0xF0F9             Option: Disabled, Value: 0x0 {09 07 1A 00 00 00 00}
0xF100             Option: Manual, Value: 0x1 {09 07 29 00 00 00 01}
0xF107         End of Options {29 02}
0xF109         Suppress If: {0A 82}
0xF10B             Variable 0x10C equals 0x1 {12 86 0C 01 01 00}
0xF111                 Not {17 02}
0xF113             End {29 02}
0xF115             Setting: customized Precision Boost Overdrive Scalar, Variable: 0x17F {05 9A 6A 03 6B 03 0D 01 00 50 7F 01 10 12 64 00 00 00 E8 03 00 00 00 00 00 00}
0xF12F                 Option: 1X, Value: 0x0 {09 0A 6C 03 02 02 64 00 00 00}
0xF139                 Option: 2X, Value: 0x0 {09 0A 6D 03 12 02 C8 00 00 00}
0xF143                 Option: 3X, Value: 0x0 {09 0A 6E 03 02 02 2C 01 00 00}
0xF14D                 Option: 4X, Value: 0x0 {09 0A 6F 03 02 02 90 01 00 00}
0xF157                 Option: 5X, Value: 0x0 {09 0A 70 03 02 02 F4 01 00 00}
0xF161                 Option: 6X, Value: 0x0 {09 0A 71 03 02 02 58 02 00 00}
0xF16B                 Option: 7X, Value: 0x0 {09 0A 72 03 02 02 BC 02 00 00}
0xF175                 Option: 8X, Value: 0x0 {09 0A 73 03 02 02 20 03 00 00}
0xF17F                 Option: 9X, Value: 0x0 {09 0A 74 03 02 02 84 03 00 00}
0xF189                 Option: 10X, Value: 0x0 {09 0A 75 03 02 02 E8 03 00 00}
0xF193             End of Options {29 02}
0xF195         End If {29 02}
0xF197     End Form {29 02}