HP 705 G3 MT CPU Upgrade to Ryzen

[moto_rat]

I agree with GSzabados. The advice given by the other guy seems confused and unconvincing. I tried to put a Ryzen 5 1500X in a Elitedesk G3 705 microtower and it also did not boot. The official supported cpu list all say "Pro" versions and my 1500X is not a "Pro". The R5 Ryzen PRO 1500 is essentially identical to the 1500X except in that the Pro has a locked multiplier and the 1500X an unlocked multiplier. Are these  motherboards limited to "Pro" by bios? Has HP whitelisted "Pro"? Or, has HP added so much cruft to their proprietary bios menu that the found it necessary to only support "Pro" to save a little space for their cruft?

[tarball8870]

APU and RYZEN have different BIOS and cannot be upgraded

The Pinnacle PI AGESA code can be applied to the 705 G3 SMR model,
The 705 G3 model is up to the Stony PI AGESA code.

705 G3 SMR P09 (Summit Ridge or Pinnacle Ridge)
705 G3 P06 (Carrizo DDR4 or Bristol Ridge)

The SMR model is also compatible with Windows 11 due to the upgrade path to Pinnacle Ridge.
P06 model is up to Windows 10.

This is an excerpt from History.txt of SP110671.

Revision History
P06 P09 ROM Family

Models Supported: HP EliteDesk 705 G3 MT Business PC
HP EliteDesk 705 G3 SFF Business PC

Version 2.31
-Adds a feature to support Enhanced Secure Erase command for ATA drive in F10 setup interface.
-Updates AMD Pinnacle Ridge silicon reference code to 1.1.0.9.
-Updates AMD Stoney Ridge silicon reference code to 1.3.0.G.
-Fixes issue where specific SanDisk USB drive is not listed in F9 Boot Menu.

P06 PCR0(with TPM2.0 SHA256) = 29205C3E0DE78C82FDA427954AC2A319BF40379664CA6D3D9670A458F053E812
P09 PCR0(with TPM2.0 SHA256) = 15903CCC7E9BF68943FA4F652555931687B6D74DD954DF8F0F5FAED4DB308BEF

You can see that the corresponding models are different between P09 and P06.

https://support.hp.com/sk-en/document/c05950716

HP EliteDesk 705 G3 MT (HP EliteDesk 705 G3 SMR System Bios P09)
2.17
SP91340
https://ftp.hp.com/pub/softpaq/sp91001-91500/sp91340.exe
HP EliteDesk 705 G3 MT (HP EliteDesk 705 G3 System Bios P06)
2.26
SP95106
https://ftp.hp.com/pub/softpaq/sp95001-95500/sp95106.exe
HP EliteDesk 705 G3 SFF (HP EliteDesk 705 G3 SMR System Bios P09)
2.17
SP91340
https://ftp.hp.com/pub/softpaq/sp91001-91500/sp91340.exe
HP EliteDesk 705 G3 SFF (HP EliteDesk 705 G3 System Bios P06)
2.26
SP95106
https://ftp.hp.com/pub/softpaq/sp95001-95500/sp95106.exe

[GSzabados]

@Tarball8870, thanks for the detailed explanation. It all makes sense.

The only question what I have left is the following:

What is the product/model number of the SMR P09 mainboard?

(If you do have any idea, or have a picture of the mainboard.)

All **bleep** sellers on eBay, Alibaba or any marketplace uses the same description for the mainboard or computer which are sold with the A series APUs, and that states Ryzen support as well. Probably a copy and paste from one of HP's pdfs about the HP 705 G3, where they are not mentioning that it is a completely different model.

And to be honest the Maintenance manual listing only the the A series APUs is disturbing as well, as HP hasn't updated the documents and hasn't made a separate line for the Ryzen models, like 706 or something. It is all just misleading and partially correct information about a set of products which has been released worldwide.

[tarball8870]

I don't know because I don't have the SMR P09 BIOS model at hand, but it seems that there are at least two types of motherboards.

AS # 854432-001 Rev0K
FOR HP EliteDesk 705 G3 MT AM4 Motherboard 854582-001 854432-001 854582-601
https://www.ebay.com/itm/193550965640?hash=item2d10895b88:g:bFMAAOSwZm1e~4Bm

AS # 854432-002 Rev0A
HP 705 G3 MT SFF 928795-001 854432-002 AM4 B350 motherboard
https://www.ebay.com/itm/HP-705-G3-MT-SFF-928795-001-854432-002-AM4-B350-motherboard-/264960536089

I also checked the motherboard of my 705 G3 SSF P06 BIOS Carrizo DDR4, but it was the following model number.
AS # 854432-001 Rev0E

These motherboards are also sold on Aliexpress, but the former 854432-001 is cheaper and the latter 854432-002 is more expensive.