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I'm using this Windows XP computer at work right now and I realized it's poor performance may be due to it only using one core, details follows:
- Processor is a Pentium E5400
- The multi-core feature is enabled in BIOS
- Device Manager shows both cores under "Processors"
- Intel Processor Identification Utility shows both cores
- CPU-Z only detects one core
- Task Manager's performance tab only shows one graph ("One graph per CPU" option is enabled).
- While doing heavy operations CPU goes to 100%, I would expect it to go to 50%
- Process Explorer (by sysinternals) also shows only one graph.
- msconfig has no option checked under "BOOT.INI"->"Advanced options" (and if I try to check /NUMPROC I only have the "1" option)
I'm puzzled, it looks like the second core is detected as hardware but it's not being used. Any help?
Have you tried putting in another hdd, installing Windows XP, and verifying what it shows? – Ramhound – 2012-11-29T15:20:09.613
That's my company's pc at work, sadly I'm not allowed to play that much with it (actually I'm surprised I'm allowed to install application and access the BIOS).
I take from your answer that you suggest something went wrong with the OS installation, right? – capitano666 – 2012-11-29T15:35:54.277
I'll post a comment rather than an answer, as not sure it will work in your case. See http://incore.net/winxp-multicpu/. If your XP installation was ghosted from a single CPU machine (as can happen in corporate environments) you might need to enable multi-core support.
– DaveP – 2012-11-29T15:49:57.827