HP Compaq dc7900 Ultra-slim Desktop PC CPU Compatibility

[Volupheles]

Will any Core 2 Quads work in the Ultra-slim Desktop? The technocal refference guide is a little vague on requirements.

It says:

The USDT form factor can support a processor rated up to 65 watts. The SFF and CMT form factors can support a processor rated up to 95 watts. Exceeding these limits can result in system damage and loss of data.

Does this mean the Q9550S (the 65W version) would work?

Thanks!

[Paul_Tikkanen · Accepted solution]

Hi:

Below is the link to the quickspecs for the dc7900 model series.

http://shop.itema-pg.com/userfiles/editor/file/7900.pdf

The supported processors can be found on pages 9 and 10.

No quad core processors are supported in the USDT form factor.

The processors are a little too expensive to experiment with.

Highly doubtful the Q9550S would work at all, because it is not supported for any model in the series, and there probably isn't a microcode update for it that would allow it to work without a microcode error report at each boot.

[Volupheles]

Thanks Paul

I've ordered an E8600 to be sure, and the cheaper Q8400S to experiment with.

I will report my findings in here later.

[Paul_Tikkanen]

You're very welcome.

If you do get the microcode error, but the PC works with the Q8400S, let me know, and I will give you the instructions for how to update the microcode.

That way, you would have at least tried it.   It may resolve the problem. It may not.

[Volupheles]

The Q8400S worked perfectly. No errors or warnings, using the latest bios. 🙂

[Paul_Tikkanen]

That is great news.

Thanks for the update.

[DC_7900]

I found this topic looking for info on a 'max' CPU upgrade for the dc7900 Ultra-slim. I would like to add...

feeling lucky after reading this thread I picked up the Intel Q9505s from ebay for cheap.

this CPU also works. 

using: BIOS 786G1 v01.23 Dated 12/11/09.

Thanks to OP if he ever sees this.