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Can a pentium 166 non-MMX replace a 90 pentium?

astroview

Golden Member
Dec 14, 1999
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Do they have the same FSB, because if they do I should be able to switch them, right?

(same socket too)
 

chemwiz

Senior member
Mar 8, 2000
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A 90 runs at 60MHz FSB, with a 1.5 multiplier. A 166 runs at 66MHz FSB with a 2.5 multiplier. So it just depends if the board supports the higher multiplier, some only went to 133 (but they're not multiplier locked, so you could at least run it at that speed.)
 

Peter

Elite Member
Oct 15, 1999
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Depends on the mainboard.

Early socket-5 mainboards don't have multiplier jumpers, which would mean you're stuck at 1.5x - for 100 MHz max. The next iteration had one jumper for 1.5x or 2.0x and stronger voltage regulation, for up to 133 MHz CPUs. Take three finally had two multiplier jumpers for up to 3.0x, and even stronger voltage regs for up to 200 MHz CPUs.

Then came the switch to socket-7, still two jumpers, and the capability to run split-voltage processors, using separate CPU core and rest-of-mainboard voltage regulators.

Regards, Peter
 

astroview

Golden Member
Dec 14, 1999
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I have a Gateway Socket 5 mobo made by Intel, its from December of 95. Anyway of finding out if it will do up to a 200 like you said Peter?