My son’s PC is an IBM 67922HU with a Pentium 4 1.8Ghz 400 CPU.
- Is it possible to replace this P4 with a 2.4 or 2.6 or 2.8Ghz 400? IBM cannot confirm this and suggested to consult experts on this subject. So here I am!
- Is it possible to replace this P4 with a 2.8Ghz 533? I notice they are cheaper. Probably not as the Bus speed on the motherboard is 400. I would appreciate your confirmation of this nevertheless.

jb99