View Single Post
  #1 (permalink)  
Old 27th February, 2009, 02:07 AM
trodas's Avatar
trodas trodas is offline
Join Date: January 2005
Location: Czech republic
Posts: 131
Send a message via ICQ to trodas Send a message via AIM to trodas Send a message via MSN to trodas

Question Pentium 90 (P54C) multiplier modification?

An old Pentium 90 CPU (P54C) has internal multiplier x1.5 - so it make from the 60MHz FSB the 90MHz clock.

I do wonder, however, if that multiplier can be set to x1

Usually people want to overclock, however I would like to try underclocking and the x1.5 multiplier suxx. If I understand good the multiplier settings, for example for the Asus TXP4-X Socket 7 board: RapidShare: Easy Filehosting
( Asus TXP4-X Socket 7 - CapsMod Your Motherboard - CapsMod Forum - Powered by Discuz! )
Then setting BF0, BF1 to 1-2, 1-2 (manual, page 17) let the CPU internal multiplier be used, so, if I can modify the multiplier somehow (burning internal path? connecting two pins?), then I got the underclocker dream machine.

Anyone know if that is possible or know someone who might know?

Another possibility is the Pentium Overdrive, but dunno where to obtain one and if it ever run at x1 multi. Any other ideas, beside rare 5V Pentium 60/66 witch use Socket 4 and hence are not very usufull as the nice underclocker board has Socket 7 (5) ...

Another idea pop into mind and that is the Mobile Pentium or Mobile Pentium MMX chips for laptops, but I have no idea either where to get one of these, besides I have no idea if they can run with the x1 multi...

Anyone got some clues there?
"It is dangerous to be right in matters on which the established authorities are wrong." - Voltaire
"I believe that all the people who stand to profit by a war and who help provoke it should be shot on the first day it starts..." - Hemingway my config - my caps
Reply With Quote