Microcode Update for HP Compaq DC7900 (786G1) to support Q6600 (4 cores in general)

[Fareed2926]

Need to upgrade my pc to E8400 dual core to Q9550 quad core.but my bios not upgrading

[DeathBringer]

At first you need to boot in native DOS with new CPU installed.

[MarkF]

Try to use my mod

HI,
I am not familiar with microcode-mods etc., so please be gracious ...
I am also using a dc7900, "newest" BIOS 786G1/v01.27 (10/22/15), ME-Firmware 5.0.1.1111 (whatever this means - I don´t know), Microcode 0xA0E (as CPU-Z says - I don´t know whether this is the latest version from HP as linked in the first post). I have changend the old CPU to Q9300 and later to Q9400. The BIOS/PC accepted w/o error-message. Win10 LTSC IoT is running (due to missing SSE4.2). For some months the system was running, but with the strange effect that after some hours and using the browser the display disappeared. Later sooner or later a BSOD with error-messages which lead to the video-system/-driver (integrated Q45/GM4500) appeared. The same sympton with Win11/23H2, so it is not a matter of the Win-installation. Maybe this is a Firmware-/microcode-issue?
Now my question: Can and/or should I update the firmware with your mod (I assume it is a firmware-update) although I am using a Q9400 and there is no microcode-error-message?

[DeathBringer]

Make a screenshot of regedit with expanded key HKEY_LOCAL_MACHINE\HARDWARE\DESCRIPTION\System\CentralProcessor\0

[MarkF]

Make a screenshot of regedit with expanded key HKEY_LOCAL_MACHINE\HARDWARE\DESCRIPTION\System\CentralProcessor\0

Thanks a lot for your instant reply. Here is the screenshot:
   

[DeathBringer]

So It's not microcode issue.

[MarkF]

So It's not microcode issue.

Thanks. But what have you learned from the screenshot?
I would like to know whether I should install the HP´s microcode-update (I don´t knwo whether the microcode is already updated) or your mod.

[DeathBringer]

But what have you learned from the screenshot?

Current BIOS already has suitable microcode (version 0xA0E).

[MarkF]

But what have you learned from the screenshot?

Current BIOS already has suitable microcode (version 0xA0E).

This is no surprise, this is what I have already mentioned in my request, because this was reportet by CPU-Z.
But does this mean, that the HP-microcode-update (version 1.01) as linked in the first post is already installed?
And does this mean, that your mod does not bring any furhter improvement?

[DeathBringer]

And does this mean, that your mod does not bring any furhter improvement?

You're right.