8400 uses a 925X chipset, which doesn't support Dual Core CPUs. http://www.intel.com/products/chipsets/925x/index.htm
The CPU socket is a LGA775. You can upgrade the CPU between 630-670 (3.0GHz-3.8GHz) Prescott 800Mhz. I wouldn't upgrade past a 640 (3.2GHz), because the 3.4GHz, 3.6GHz, and 3.8Ghz will cost between 280-620 dollars.
If you're thinking of gaming, then I suggest Intel or AMD dual core CPUs.
Thanks, will the 3.8GHz CPU support 64-bit OS?
If my answer was helpful, please use the 'Did this answer the question' and click: YesForum Member since 2001I am not employed by Dell
The website does not mention the 925x supporting 670 only 672?
The highest speed CPU I can find from suppliers in New Zealand is Intel part no. BX80547PG3800F, will this work ok?
Message Edited by claytonb on 05-21-200601:11 PM
Sorry, I still carn't see where the 670 processor will work on the 925X chipset, I know the 660 does but if I want to go upto 3.8GHz I need to get the 672 processor.
I know that site says the 925x will work with the 600 sequence of processors but I'm struggling to accept it for the 670
The difference between the 670 and 672 is... the 672 has the Intel Virtualization Technology.
Please don't take my word, email Intel for a definitive answer.
Over and Out
Message Edited by claytonb on 05-25-200609:26 AM
Where did you get the info from that the 8400 can support the 670 Processor?
Intel said the 925 supports the 600 series CPUs on their website, but they don't spell out each CPU. Remember, the 670 came out after the 925X chipset.
Here's an answer from Intel:
Thank you for contacting Intel(R) Technical Support.
I understand that you want to know if the Intel(R) chipset 925X supports the Intel(R) Pentium(R) 4 processor 670.
If you have an Intel(R) motherboard, the only Intel(R) Desktop motherboard from the 925 models that supports the Intel(R) Pentium(R) 4 processor 670 is the D925XHY as showing at the following website:
If you have a 3rd party motherboard with an Intel(R) 925X chipset, I would recommend you to contact the motherboard manufacturer for compatibility information, since the supported processors for each motherboard is not determined only by the chipset, but also by the BIOS and other motherboard components.
Please do not hesitate to contact us again if you need further assistance.
Intel(R) Technical Support