the best advice i can give you is to look it up at motorola.com, or possibly ibm.com since they also make the chips. also check the tolerances on the temperature sensor, as i recall, it's +-4 deg C and i forget the resolution, you need to subtract both from the rated max in case your' sensor is reading low and just below the next increment. you also need to check under a good heavy processor load. varying processor load is why your temp varies (partially at least), and of course room temperature also affects it. i have previously looked all this up but honestly don't remember the details off hand. of course it would probably be best not to run right up against the limit as well so that you have some head room left to allow for programs that might heavily load the processor and hot days in the room where the machine is. i'd suggest checking with several apps to see which heat it up the most and would include some benchmark software, and let the software thrash away for at least a couple of minutes to let the temperature stabilize under load.
i'm actually surprised i haven't seen any one try closed loop cooling on their processor yet (i.e. maintain it just above 0 deg C, which i think is the bottom of the operational temperature range), this is something i plan to play with although it makes things more complicated and requires insulation around the cpu (and under that part of the board) to prevent water condensation. some people have used a peltier cell open loop and gotten some good results but i haven't (yet) seen a nice implementation, though i haven't checked around lately. a bigger heatsink with a fan would also help, as would beefing up the case fans and using the heatsink grease with silver is definitely an excellent idea. i know no one likes noise, but if you do some of the noise mods people have come up with and use the better more quit fans you should be able to increase cooling and cut down on the noise at the same time. p.s., when i push the 9500 to it's limits i'll definitely post the info on the web. after that's done i may try the same on a g4, especially if i can find a spare cpu module cheap (just in case, because i want to do radical mods including beefing up the cache on the cpu card from 1m to 4m which would help performance significantly itself). i'm actually more worried about the connector on the processor card than the processor itself, it has a lot of pins and could probably be easily damaged (i suspect a mosquito, much less a fly getting on it while plugging it together would destroy it, or any careless misalignment). in any case, a thorough google search is definitely in order before starting any clock chipping exercise. Mark wrote: > > on 2/21/03 7:43 AM, Philip Stortz at [EMAIL PROTECTED] wrote: > > > a little overclocking isn't a risk at all, or at least not a significant > one... there are also some design tolerances built in, like how tolerant it > is... increases with temperature.. etc. > > What I want to know is this: What (using Gauge Pro or some such utility) is > a reasonable temp for a Desktop G3? I've got a 233 replaced with a 350 > copper zif and overclocked to 455. Runs great. But it would be helpful to > know what's ok and what's too much. Sometimes mine's at 55 degrees (F) > sometimes at 65, sometimes at 74. What's too much? 115, or 75? Is there > any general rule of thumb to go by so that I can have some idea of what to > expect? Thanks all, M ---------- --Philip Stortz-- "There are reminders to all Americans that they need to watch what they say, watch what they do, and this is not a time for remarks like that; there never is." White House Press Secretary Ari Fleischer, how much blood will it take to win back the first amendment, which the Bush administration clearly does not support! The thought police are amongst us. -- G-List is sponsored by <http://lowendmac.com/> and... Small Dog Electronics http://www.smalldog.com | Refurbished Drives | -- We have Apple Refurbished Monitors in stock! | & CDRWs on Sale! | Support Low End Mac <http://lowendmac.com/lists/support.html> G-List list info: <http://lowendmac.com/lists/g-list.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/g-list%40mail.maclaunch.com/> Using a Mac? Free email & more at Applelinks! http://www.applelinks.com
