EPYC 7742 ES (100-00000053-04) and Gigabyte MZ72-HB0 3.0 compatibility troubles

[Epycly Screwed]

Hello everyone,


I have 2 epyc 7742 ES with a MZ72-HB0 3.0 motherboard and I am unable to get it to post. I realize after some research that I need to change the bios and downgrade the AGESA to below version 1.0.0.3.

My question is how do I do this? And do I have to do anything else to make this CPUs work on this board?

Additionally are there any pitfalls I need to lookout for so I don't ruin my motherboard or any components?

Also if someone wants to walk me through this I would be more then happy to pay them.

 

[RolloZ170]

I realize after some research that I need to change the bios and downgrade the AGESA to below version 1.0.0.3.

only required for real ES stepping A0. you have a 100-00000053-04, stepping B0 QS. this is same than production unit.

And do I have to do anything else to make this CPUs work on this board?

MZ72-HB0 3.0 is delivered with MIlan BIOS.
install correct BIOS for rome support ?

 

[RolloZ170]

Additionally are there any pitfalls I need to lookout for so I don't ruin my motherboard or any components?

try only one CPU in first socket. if you have many GB RAM it take a minute to check, so wait longer.
what memory do you have ?
login to IPMI WebGUI and check the LOGs

 

[Epycly Screwed]

I have 512gb of RDIMM memory.

Also what do you mean by:
"only required for real ES stepping A0. you have a 100-00000053-04, stepping B0 QS. this is same than production unit."

What does A0 and B0 mean? And what does stepping mean.

Thanks for your help!

 

[RolloZ170]

What does A0 and B0 mean? And what does stepping mean.

A0/B0 is the stage of the silicon. A0 is early here, B0 is final.
you don't need special BIOS for B0 CPU.
i had a 100-000000054-04 running on a supermicro H12 with stock rome BIOS.


try only one CPU with one RDIMM, refer to the manual where to populate only one RDIMM
Your Power SUpply is a good one with two native EPS 8pin connectors ?

 

[RolloZ170]

the 2S1404E2VJUG5 (7742 ES) needs early AGESA.
the 100-000000053-04 (7742 ES/QS) is like the retail one.

 

[Epycly Screwed]

Alright I'll give the one CPU thing a try.

And yes I have a 2000 W evga super nova.

 

[Epycly Screwed]

Everything works as is. I'm a clown and didn't wait long enough for it to properly work before turning it off and trouble shooting.

 

[RolloZ170]

I'm a clown and didn't wait long enough

i told you...

if you have many GB RAM it take a minute to check, so wait longer.

 

[Spartus]

Gotta love that 5 minutes of hoping it works when I click the power for the first time on an EPYC 7000 system.

BTW, The tyan board posts in like 5 seconds instead of 5 minutes. it still takes forever to initialize on first post, but at least the display lights up and tells you what it is doing. Was so nice first time I saw it.

 

[RolloZ170]

BTW, The tyan board posts in like 5 seconds instead of 5 minutes.

tyan EPYC platform ? should be same because Tyan uses AMI BIOS too thought.

 

[Spartus]

yeah, S8253

it doesn't boot noticibly faster, but the screen is on telling you what it is doing with a few seconds, whereas first boot with SMC H12 board takes many minutes to post a picture to screen.