socket 5 and socket 7

[afd00]

hi guys:

i have a small question: i am upgrading my friend's PC and she has a pentium 133 CPU on a socket 5 motherboard. i have an old PC with pentium 200 MMX on socket 7. i am curious to know if my CPU works on her motherboard. can the 200 MMX CPU work on the socket 5?? i tried it and it physically fits with "zero insertion force" but will it actually work????

thanks a lot...

 

[MithShrike]

Mmm, I doubt your Pentium MMX 200 will work with hers. Her chipset most likely does not support the MMX instruction set and the whole Socket 5 and Socket 7 thing would be a big hold up... you'd think after working with strictly Pentiums for the last four months at school would teach me some...

 

[AndyHui]

It's not a question of chipset instruction support. Motherboard chipsets have nothing to do with processor instruction sets.

Socket 5 boards only support up to 133MHz Pentiums. There is a difference of one pin between Socket 5 and Socket 7; that additional pin is needed to go to further speeds beyond 133MHz (multiplier issue).

Secondly Pentium MMX processors have a dual power plane. Your board must support sending two different voltages to the processor. Most socket 7 boards have a jumper to set for "P55C" operation. Socket 5 motherboards do not.

You will fry your Pentium MMX on a Socket 5 board.

 

[BigBadBiologist]

Yeah, actually, the 166 won't fit in a socket 5. However, Intel made overdrive CPUs for socket 5 boards. I think they went up to 200MHz MMX. You could probably dfind one on eBay for less than $10. I got one for an old system and it worked well.