HP Compaq DC5800: Xeon Support

[Xc2z]

Hello there,

i desperate by trying to insert CPU-IDs for my "Xeon X3363 with Pinmod" in my HP Compaq DC5800 with Q33 Chipset.

The Problem is:
- Q33 Chipset only support 3xxx Xeons (according to www.delidded.com)
- i think it is no standard BIOS, it is specialized from HP only for this Board
- cbrom.exe doesnt work, i cant add CPUIDs into the BIOS.bin (i think cdrom.exe don´t work with Board-specialized BIOS.bin)
- read the existing CPUIDs is possible (with intelmicrocodelist.exe, look at the Picture)
- can someone help me or give a note?

Current Situation:
- newest Bios from HP Website is flashed (v1.60 from 2015)
- X3363 with PIN-mod is integrated
- Board starts wird RAM-check after full Bios reset
- the only thing you can do, is press F1 to "save changes"
- then the board try to restart - but screen stays black. fans go full speed ... after a second full bios reset, RAM check appears ... same again.

I need help:
- is there a tool to "open" or "extract" or "add" the lost CPUID with the correct "PLAT" in my HP-BIOS?
- can someone try to add it? newest Bios file is in the attachment 
- i think with a hexeditor the problem is the Checksum and the unknown position, where to add ... of course this has to be 100% correct!


Nice greetings from germany 
XC2z

[DeathBringer]

Xc2z
This BIOS has proprietary format. It can't be edited by standard tools.
Updating microcode doesn't help.

[anonymous_71]

maybe someone came across before or raised the topic. if so - share the link. There is an hp dc 5800 computer with an hp 2820h board on the q33 chipset. and xeon e5450 revision e0. when i try to start just a black screen. Can anyone tell me where to find the BIOS mod

[DeathBringer]

Chipset Q33 doesn't support Xeon 5400 series.

[kokos76]

Chipset Q33 doesn't support Xeon 5400 series.

Thank you for your understanding and your time! 
You have made a patch for the 786D BIOS Family "Almost all 65nm CPUs for LGA775 / 771" . Maybe you have already found the opportunity to patch these microcodes for 786F? I want to install the Xeon X3363.

It`s for "2820h" MoBo (HP Compaq dc5800 Microtower PC) : 786F2 BIOS and 786F microcodes .
https://s8.hostingkartinok.com/uploads/i...bc3f5a.jpg

[DeathBringer]

kokos76
Tell sSpec of your Xeon.

[kokos76]

I haven't bought it yet. I can buy either C0 (SLASC) or E0 (SLBC3).

[DeathBringer]

You need to find Core 2 Duo and Xeon with the same CPUID.

[kokos76]

The most powerful officially supported by dc5800 processor is Core 2 Quad Q9650 Processor (3.0-GHz, 12 MB L2 cache, 1333-MHz FSB). It have sSpec SLB8W, CPUID 1067A and stepping E0.
Xeon X3363 (4 core, 2.833 GHz, 12 MB L2 cache, 1333-MHz FSB) stepping E0 (SLBC3) also have CPUID 1067A. Therefore, I will have SLBC3.

[DeathBringer]

No required CPUs - no help