The Turbo 040, as you probably know, has one oscillator-- a full-size metal- can one. The cards use a 2x multiplier to derive the 68040's speed. So, the 68040-40 model uses a 20 MHz oscillator. I desoldered this, and replaced it with a 24 MHz oscillator. 24 x 2x Multiplier = 48 MHz. To keep it cool, I added a fan taken from a PC CPU-Cooler to the heatsink.
I tried a 50 MHz with a 25 MHzoscillator too, but, as has been previously stated, that makes 1.4 MB floppies unreadable. At 48 MHz, only 800k floppies don't work. I don't use them, so that's fine with me. -- Epicenter On 17 Dec 2002 at 7:38, Snook, John R wrote: > < my 48 MHz (overclocked) Turbo 040-accelerated > IIci runs circles around my 50 MHz PowerCache '030 accelerated IIci. It did the same >when > running at a stock 40 MHz, too. :) > > -- Epicenter > > Please tell us how you overclocked it. > johnsn > > -- > Vintage Macs is sponsored by <http://lowendmac.com/> and... > > Small Dog Electronics http://www.smalldog.com | Enter To Win A | > -- Canon PowerShot Digital Cameras start at $299 | Free iBook! | > > Support Low End Mac <http://lowendmac.com/lists/support.html> > > Vintage Macs list info: <http://lowendmac.com/lists/vintagemacs.shtml> > The FAQ: <http://macfaq.org/> > --> AOL users, remove "mailto:"; > Send list messages to: <mailto:[EMAIL PROTECTED]> > To unsubscribe, email: <mailto:[EMAIL PROTECTED]> > For digest mode, email: <mailto:[EMAIL PROTECTED]> > Subscription questions: <mailto:[EMAIL PROTECTED]> > Archive: <http://www.mail-archive.com/vintage.macs%40mail.maclaunch.com/> > > Using a Mac? Free email & more at Applelinks! http://www.applelinks.com > -- Vintage Macs is sponsored by <http://lowendmac.com/> and... Small Dog Electronics http://www.smalldog.com | Enter To Win A | -- Canon PowerShot Digital Cameras start at $299 | Free iBook! | Support Low End Mac <http://lowendmac.com/lists/support.html> Vintage Macs list info: <http://lowendmac.com/lists/vintagemacs.shtml> The FAQ: <http://macfaq.org/> --> AOL users, remove "mailto:"; Send list messages to: <mailto:[EMAIL PROTECTED]> To unsubscribe, email: <mailto:[EMAIL PROTECTED]> For digest mode, email: <mailto:[EMAIL PROTECTED]> Subscription questions: <mailto:[EMAIL PROTECTED]> Archive: <http://www.mail-archive.com/vintage.macs%40mail.maclaunch.com/> Using a Mac? Free email & more at Applelinks! http://www.applelinks.com
