Mad Dog, Thanks for the help, but that number wasn't listed in my hard print catalog, nor in the searchable catalog on the Digi-Key website...
If it helps at all, the part is about 10x5mm with the solder pads forming a square 5mm on a side. The closest part to that I can see is SE2848CT-ND (33.3333MHz part). What do you think about replacing it with SE2849CT-ND (36.000MHz). That's Epson Electronics part #SG-636PCE 36.000MCQ (Also, a 38MHz part on the CE board will give me 133MHz... ;-) Think I could get that w/ a little thermal grease under the heatsink?) I took apart the CE and CS again to compare mobos... There are some *subtle* differences (besides the missing 8MB RAM on the CS, which is pretty glaring). Between the CPU and oscillator, there is a row with 5 resisitor positions labeled R46 - R50. Immediately to the right of the oscillator are R127, R43, and R44. On the bottom of the boards in the same place (beside the oscillator) are R126, R128, and R129. R45 is off to the left near the trackpad/sleep actuator connector and is set on both mobos. R#: 43|44|46|47|48|49|50|126|127|128|129 :: Resistor position CS: --|--|OO|--|--|--|OO|---|OOO|OOO|--- :: 5300cs 100MHz mobo CE: OO|--|--|--|OO|--|OO|---|---|OOO|--- :: 5300ce 117MHz mobo ---------------------------------------- OO or OOO denote an open position -- or --- denote a closed position So the CE and CS mobos have R44, 47, 49, 50, 126, and 129 in common. I should point out that I'm no good at tracing circuits (never learned how, exactly), so I have no idea what these resistors are connected to, but it seems they are connected to the oscillator. Anyway, maybe that gives you or someone else some ideas about changing the CPU multiplier... Do these early 603/NuBus based machines support bus multipliers? Can you, say, set the bus to 1.5x the oscillator's frequency like you can on late model PowerMacs/Books? Peace, Drew -- Having graduated (with a physics BS :-P), I will be using the email address <[EMAIL PROTECTED]> Please update your address book. <http://homepage.mac.com/alk/> "Anyone can fly, all you have to do is throw yourself at the ground and miss." -Douglas Adams, Hitchhikers Guide to the Galaxy -- PowerBooks 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> PowerBooks list info: <http://lowendmac.com/lists/powerbooks.shtml> --> 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/powerbooks%40mail.maclaunch.com/> Using a Mac? Free email & more at Applelinks! http://www.applelinks.com
