Thank you, Bob and Chuck. The original exchange took place in mid-March of which I post one onlist since heat measurement and control are critical aspects of 2400 longevity. I noted quite inaccurate readings with wide ranging oscillations from some of the measurement software (temps would even change in shift from background window to foreground). Hence additional feedback from others, as available, will be interesting (see below, with excuses for the complete repost of Bob's excellent post). BY FAR, biggest obstacle to another round of upgrades will be heat.
------- Date: Sun, 17 Mar 2002 Bob, Very cool indeed. Powerlogix G3/G4 Cache Profiler 1.3 & 1.4 & Gauge Pro 1.1 all show wildly different temperatures. When all 3 are running, temp shows as 88-90C. When either Powerlogix G3/G4 Cache Profiler 1.3 or 1.4 are running with Gauge Pro 1.1, temp shows as about 84C. When just Gauge Pro 1.1 is running, temp shows 74C. This holds with Extensions on or off. Essential Powerbook Strip shows 52-63C depending on usage, irrespective of others. But with Essential Powerbook Strip running, Newer's GaugePro shows 80C. Steady browser activity runs at 63C. The actual feeling is quite cool and comfortable (the bottom of the case is merely comfortably warm which suggests a true temp in the 55-64C range. It seems these utilities are measuring some activity/current draw/calculation algorithm--but quite imprecisely as they seem to conflict a bit with one another. NOW, the real surprise. While showing 65C, the actual external measurement after 90 minutes under my 2400 bottom is 40.8C. So these algorithms are WILDLY varying. If you have (or can download) Essential Powerbook Strip, let me know what it measures. I think it's more accurate. The PL & Newer software jumps all over the place depending on what else is sampling the CPU cycles. Best, Sidney ---------- Just added Bob F's post from this morning's Central European time download: > I spent about four hours last night making various fractals on the > goolsbeed Comet, rendering spool files of 1MB to 2MB each. The > temperature readings never got higher than 58C (G3Strip) or 64C > (Essential Strip). Nice! Essential Strip at 64C corresponds perfectly with my consistent 63-64C "under load" measurements running G3-400 all day on aluminum heatsinks for CPU and HD. I will try to find my race tire pyrometer and do measurements all over the 2400. ----------- On 4/10/02 rlf9 <[EMAIL PROTECTED]> wrote: > Howdy, > > This is in response to Sidney Ho's request that I redo my temperature > test on the Comet chuck goolsbee worked on this winter to beef up its > heat dissipation properties. He used lots of gap filler and heat > compound, plus he added a copper plate between the Interware 320 cpu and > its heatsink assembly. > > Here are my results, wildly unscientific as they are, using the "G3Strip" > and "Essential PowerBook Strip" csm's to find the "Internal" temperature > of the machines during and after some file-copying. (Sorry, that's all I > had time for.) > > The source for the files was a 2.5" 5GB drive mounted into one of those > handy plastic external drive cases (from MCE) which connects via PC Card > (natch!). Throughput was about 1MB/sec. > > Temperatures are Centigrade. Test machines are set flat on bedsheet on > bed, a notoriously hot situation. Not to worry though... > > First I tested another Comet 320, "Blue Comet," with no special cooling > fixes, by transferring about 500MB of various files to it. Then I did the > same with the goolsbeed "Black Comet." > > ---------------- > > for "Blue Comet" G3Strip Essential Strip > > on for a while, idling: 48C 56C > > after 50% transfer: 56C 58C > > at completion: 56C 58C > > idle, 5 minutes later: 56C 58C > > ------------------------- > > for "Black Comet" > w/chuck's mods... > > idling: 28C 37C > > after 50% transfer: 36C 42C > > at completion: 40C 45C > > idle, 5 minutes later: 36C 47C > > after 5 more minutes: 40C 48C > > Then, put Comet to sleep. > > ------------------- > > Somewhat later on, I transferred 2.1GB of 2,766 mp3 files to the > goolsbeed "Black Comet." > > on waking: 36C 37C > > 1/3 done: 44C 49C > > 1/2 done: 48C 54C > > 3/4 done: 52C 59C > > at completion: 52C 60C > > idle, 5 minutes later: 48C 59C > > 1 hour later, bottom is > very hot! But temps are: 52C 61C > > after 1 hour more, idle > but now sitting on > LapBottom pad: 48C 58C > > ------------------------ > > My guess is that transferring the 2.1GB's to "Blue" would have probably > resulted in about 10C more heat at the transfer's completion. > > Of the two csm's, G3Strip's readings were usually closer to those of > Gauge PRO and G3/G4 Cache Profiler than to those of Essential csm. > (Sorry, Sidney...) > > Both csm's are shareware. I prefer G3Strip because the temperature is > always displayed, while Essential strip requires a mouse move and a > click. > > Conclusions (apart from offering negative comments on my "methodology")? > > Cheers, > > Bob F > ---------- Duo/2400 List, The friendliest place on the Net! A listserv for users and fans of Mac subportables. FAQ at <http://www.themacintoshguy.com/lists/DuoListFAQ.shtml> Be sure to visit Mac2400! <http://www.sineware.com/mac2400> To unsubscribe, E-mail to: <[EMAIL PROTECTED]> To switch to the DIGEST mode, E-mail to <[EMAIL PROTECTED]> Need help from a real person? Try. <[EMAIL PROTECTED]> ---------- Dr. Bott | 10/100 Ethernet for your 2400 is finally here! MPC-100 | <http://www.drbott.com/prod/mpc100.html> RoadTools $30 PodiumPad available at Apple retail stores, $20 Traveler CoolPad at Staples. Both in white for iBooks at <http://roadtools.com> Midwest Mac Parts ][ <http://www.midwestmac.com> After-market parts for Macs. ][ 888-356-1104 ][ MacResQ Specials: LaCie SCSI CDR From $99! PowerBook 3400/200 Only $879! Norton AntiVirus 6 Only $19! We Stock PARTS! <http://www.macresq.com>
