Right now in one of my several computers I have an old Slot Celeron 400 OC to 450. And just today my place of work gave me a new old Pentium 3 550 computer. The computer is crap so I wanted to just use the CPU on my Celeron box. My MB will support it but I think I may need a new CPU fan. Does anyone think I could use my old 450 fan on my new 550 CPU?