Skip to main content
Home Forums 68kMLA Would this work? — #2
Post #2 by Byrd
Source Forum68kMLA
CategoryHardware
Post DateThu, 24 Jan 2008 - 08:26
Original URLhttps://68kmla.org/bb/threads/would-this-work.11589/
Post
Sadly it won't work - the 486/66Mhz CPU you have is 5V, and the 5x86 CPUs run at 3.3V (ideally 3.45V). I used to run a Kingston Turbochip 5x86 133Mhz upgrade in my LC630 DOS machine, which had a little PCB on the board to regulate/increase voltage to 5V.

This CPU was fast but Windows wouldn't install - I'm assuming the DOS card didn't have the proper BIOS CPU microcode support to run it properly. It was fine for DOS games though.

Your best bet would be a Intel Overdrive 486DX4-100 CPU, which seem to kick around in many old 486 towers. I've since scrounged around for one of these and have installed it in my LC630. Windows 98 SE and everything else now run without issue. If I ever find another LCGuy, it's got your name on it :D

It is unusual, the LC630 DOS card - especially how it piggybacks off the '040 socket and it doesn't look terribly stable perched up on there. Once you've got this card + Commslot ethernet it all looks a bit of a mess :p Clearly not Apple's finest motherboard design!

JB

mp.ls