|Tell us the make and model of your brand name system, or if you have a generic desktop system, the make and model of the mboard. |
The specific model of a brand name system is shown on a label on the outside of the case somewhere, or it can often be determined by going to the brand name's web site and loading a program they have available.
For Dell computers, they have a Service Tag number - the specific model can be determined by using that on their site, or can often be determined there automatically by you downloading some software. The Service Tag number should be on a label on the outside of the case, probably on the bottom on a laptop, on the back on a desktop, and is often also shown in the bios Setup.
The model, sometimes the make, of a mboard in a generic desktop system is usually printed on the mboard's surface in obvious larger characters, often between the slots.
The model is often also displayed on a logo (graphical) screen early in the boot, but it's often not as specific as the specific model number.
The P4 cpu family is large - a P4 can be old or recent - you telling us it's 2.66ghz doesn't tell us enough.
What is it's Intel part number ?
The cpu you are trying to use must be supported by.....
- the mboard model's (PCB) version or revision - that's often printed beside the model number on a mboard in a generic system - on a mboard in a brand name system it could be printed anywhere on the board, and there may be no model number.
- the main chipset on the mboard
- the present bios version the mboard has
If you have a generic desktop system, consult the CPU support list for the model of the mboard, on the mboard manufacturer's site on the support pages for your mboard model.
Or, look here for unofficial info, that's probably correct:
The part numbers of the cpus are on the left in blue there.
If you have a brand name system, it's a crap shoot whether or not a specific cpu (that it didn't come with) can be used - there's usually very little or no info on the brand name's web site about that.
If your desktop mboard was made by Intel, or if it's an OEM only Intel made mboard in a brand name system, you must move a jumper on the mboard in order for it to set itself up for a cpu when the cpu has been changed, then you move it back. If you have a generic system with an Intel made mboard, consult the mboard manual. If you have an OEM Intel made mboard in a brand name system, there may be an OEM mboard manual on the Intel web site, or there may only be info about the mboard on the brand name's web site.
Most mboards with Intel main chipsets WERE NOT made by Intel.