Upgrade HP Compaq Dc7900 Ultra-Slim Desktop PC

[Paul_Tikkanen]

Gi, @DEATH-DFC 

I recently used the method in that discussion I posted to upgrade a dc7900 SFF (Q9500 processor) to W11.

Worked just fine.

[DEATH-DFC]

As I said, so far I've never had a problem upgrading old PCs to Windows 11.
But I think I've found the problem... One of the 4GB memory sticks is defective.. This old PC is really the one that gave me the most difficulty upgrading.
And I don't know if this has a connection, but when I received the 2 memory sticks (supposed to be new), one was open (broken seal). I don't know if this is the one that is defective...

[DEATH-DFC]

So I tried the migration again with 6GB (4+2, and after checking the integrity of the memory this time...) and it failed again.
I then checked the system and EVERYTHING was corrupt! The system files (SFC), the file system (CHKDSK), and the deployment image (DISM).... I repaired everything, I will try a new migration to Windows 11 just to see, but in any case there has been so much corruption that I am going to do a fresh install of Windows 10 and then I will do a migration again. I hope that the state of the NVMe SSD is not the cause either (see the other messages from before on this subject). I'm getting tired of this old thing!

[DEATH-DFC]

I reinstalled Windows 10, then just the updates, no installation of the missing drivers (SOL and serial interface) and I directly upgraded to Windows 11 with MediaCrationToll.bat in auto mode, it's passed on the first try.
On the other hand, I still have the problem of displaying the CPU percentage with the task manager which indicates to me a maximum of 91% and 2.58 Ghz instead of 100% and 2.83 Ghz when the CPU is at full capacity.
Have you checked if you have the same problem?
Can you do "CPU Stress" with CPU-Z for example?

[NonSequitur777]

@DEATH-DFC,

I mothballed/dismantled my HP Compaq dc7900 USDT, so I wouldn't be able to submit it to additional tests for now.

However, according to UserBenchMark, my Q9550S performed all right:

Link: HP Compaq dc7900 Ultra-Slim Desktop Performance Results - UserBenchmark.

Mind you, I used a (much) larger power supply to power my USDT: 230-watt, with p/n: 677765-001 (693714-001).

Kind Regards,

NonSequitur777

[DEATH-DFC]

This is not a performance problem, but a display problem in the Windows task manager. With another application, like CPU-Z or even HWinfo for example (or any other diagnostic and benchmarking software), they clearly indicate that the CPU is at 100% when it is fully loaded. As I said, it seems to me that I had already had this problem with another old PC but it disappeared when I changed the processor... I think. Anyway, looking a little on the Internet it seems that this is a recurring problem on Windows for certains processors and/or motherboards, BIOS, energy management settings, or whatever...