Hi,

Now this one has me stumped.

I recently upgraded my wifes Dell Dimension 2400 PC. It was running a Socket 478 Celeron 2.6/128kb/400, I wanted to boost the system a little so I got her a Pentium 4 HT 2.8/512kb/800.

Now when the machine posts, it shows up as a 2.8ghz P4...@ 1.4ghz.

HT works fine and the BIOS has been updated to the latest version. I have tried memory that works in my Pentium D system @ 800 and it still does the same. Does anyone have any pointers.... bearing in mind Dells BIOS is ...er...rather limited.

I have looked for jumpers to see if there is somewhere manual to change the bus, but no.

I have loads of numbers and screenshots of CPU-z that might help illustrate my point. But suffice to say it is not right as it is.

Cheers
Tongy

Does the board support 800fsb chips? If it dont that explains the half speed thing.

Quote from: sdpDoes the board support 800fsb chips? If it dont that explains the half speed thing.

The Dimension 2400 series did. It also has support in the BIOS for Hyperthreading (which works), which only existed at that speed (800)AFAIK.

I had thought that... the celeron being at 400 and the p4 needing to be at 800, but there is nowhere to change it at the system works well, just not as well as it could

Cheers
Tongy

You sure it supports it?
http://support.dell.com/support/edocs/systems/dim2400/en/sm_en/specs.htm
Also HT is supported at 533fsb

Bugger.

Cheers
Tongy

Its weird though, a Celeron 2.6 is still slower than a 1.4 P4 with HT and 512kb l2... Still. I think I will stick with the P4

Cheers
Tongy

Celerys are really choked on cache availability so performance is dire.