HP dc7800 USDT processor upgrade

[DeathBringer]

This motherboard doesn't support quad core CPUs.

[rue_magicien]

DeathBringer,

But why not support? There is a socket and chipset supports this processor. I think this is at the BIOS level you need to edit CPU limits. As I said, it is started, but gives an error that the TDP of the processor is exceeded and stops starting.

[DeathBringer]

As I said, it is started, but gives an error that the TDP of the processor is exceeded and stops starting.

Show a photo of the screen with this error.
Have you a hardware programmer?

[rue_magicien]

DeathBringer,

The monitor unfortunately does not turn off and does not show an error code. However, after reading the manuals, I highlighted what I wrote there with a red rectangle:
https://drive.google.com/file/d/14pH_HfB...sp=sharing
https://drive.google.com/file/d/152haBcX...sp=sharing

I think it means that the BIOS and the computer starts normally with this processor, since it can show errors through the red LED that are hardwired into the memory of BIOS, but in my opinion the BIOS runs into the fact that a processor with such a TDP or CPUID is listed in the blacklist, or vice versa that it is not whitelisted.
I read that HP does this with its laptops, for example, there is a whitelist wired into the BIOS which mini PCI-e WIFI cards will support. and if you try to put a card that is not in the white list, it will give an error. Most likely it's the same story, i think

I don't have a programmer, but I can order.

[DeathBringer]

It means that's not BIOS problem.
It's hardware incompatibility.