Can anyone tell me what is EPYC 7D12

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BoredSysadmin

Not affiliated with Maxell
Mar 2, 2019
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found this tidbit:

32C / 64TCache 128 MB1.10 GHz / 3.00 GHzTPD: 85W

Source says OEM only part

It also mentions the same SP3r1 socket as your boards have, but since this a brand new part, maybe bios is lacking..
 
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Wasmachineman_NL

Wittgenstein the Supercomputer FTW!
Aug 7, 2019
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If I had to guess, it's a Dell OEM Epyc, and it quite certainly is bound to Dell servers only because of some bullshit security thing.
 

chraac

New Member
May 5, 2019
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It seems that some SuperMicro mobo with special version of BIOS can boot this CPU and enter Windows
1602946506052.jpg
 

nasbdh9

Active Member
Aug 4, 2019
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7D12 clock frequency is too low, it is of little value
and can only be started under a specific bios
 

cyclegen

New Member
Nov 29, 2020
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it seems that h11ssl-I v1.01 can recognize this chip, so can we extract the microcode and update other mono to use it?
 

RolloZ170

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Apr 24, 2016
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it seems that h11ssl-I v1.01 can recognize this chip, so can we extract the microcode and update other mono to use it?
the microcode is standard rome prod.unit. that's not the point.
update 13.07.2023
h11ssl-i with BIOS 2.0a mem.slots cdgh (no hynix, no 2133mt)
 
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RolloZ170

Well-Known Member
Apr 24, 2016
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so anyone try to use it on h12ssl-i?
"AMD processors are shipped unlocked from the factory, and can initially be used with any OEM’s motherboard. But once they are used with a motherboard with PSB enabled, the security fuses will be set, and from that point on, that processor can only be used with motherboards that use the same code signing key" (Source: AMD statement to STH)
if you buy a new 7D12 it will should work on any rome supporting motherboard.
update: looks that a low AGESA RomePi version is required.
7D12:
ASRock EPYCD8-2T BIOS P2.30 AGESA RomePI-SP3 1.0.0.0 <- working
H11SSL-i BIOS 2.0b 12/02/2019 AGESA RomePI 1.0.0.4 <- stop at code 60 (can probably solved with some BIOS tweaking???)
H11SSL-i BIOS 2.0a 08/08/2019 AGESA RomePI 1.0.0.1 <- working


but if the 7D12 was once was ran on a dell it won't work on other motherboard than dell.
 
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chraac

New Member
May 5, 2019
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"AMD processors are shipped unlocked from the factory, and can initially be used with any OEM’s motherboard. But once they are used with a motherboard with PSB enabled, the security fuses will be set, and from that point on, that processor can only be used with motherboards that use the same code signing key" (Source: AMD statement to STH)
if you buy a new 7D12 it will work on any rome supporting motherboard.
but if the 7D12 was once was ran on a dell it won't work on other motherboard than dell.
Can you paste the original post here, I just wandering if there is a way to disable some cpu pins to bypass those fuses.
 

chraac

New Member
May 5, 2019
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See through the article, I figure out that:
1. AMD has implement some mechanism that allow server vendor like DELL to install a public key into PSB (Platform Secure Boot), and then the system will only boot with the firmware signed with corresponding private key.
2. PSB (Platform Secure Boot) is an Cortex A5, which is Aarch32, easy to disassemble
3. Only DELL has committed to use the PSB fuse

And just for my curiosity, what algorithm amd used in their fw signing
 
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chraac

New Member
May 5, 2019
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the cheapest way to get arround this is to buy a refurbished dell motherboard.
Or maybe we could extract the PSP fw from dell and then plant into our custom bios, but this base on the hypothesis that there is not any bios signed/verify procedure in EPYC boot