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Cool Runnings

Author	Topic
appleseed Starting Member Australia 40 Posts	Posted - 11 Mar 2003 : 18:27:56 I am tempted to remove the fan from my Lc-475's. I find that fans are relatively noisy and I wonder if they're all that efficient. I don't think that these boxes generate so much heat given the size of the microproccessor. Has anyone tried to drill holes into the sides etc to create oportunities for convection cooling or that only an Imac thing? Somehow I think these Grunts would handle it, but would like to have other people's opinions. Thanx Folks
catsdorule Senior Member Canada 1627 Posts	Posted - 11 Mar 2003 : 19:58:18 LOL I thought you meant the movie. -danny You! What PLANET is this! -- McCoy, "The City on the Edge of Forever", stardate 3134.0 ------- 68k Macintosh Liberation Army 68k Macs Liberated: 3
QuadraJets Junior Member USA 344 Posts	Posted - 11 Mar 2003 : 21:28:11 I tried this with my 475 MacIP bridge, and even with a Huge @ss heatsink, the thing still overheated after a couple days. The fan is noisy at 12 volts, but if you supply it 5 volts instead of 12, it cools it just enough so that the pizzabox won't overheat, and it is pretty quiet. DO NOT run the 475/605 fanless without a heatsink on the processor, even a 25mhz gets quite hot, with the fan on. The heatsink I use is a monster that I liberated from my dead AppleVision 1710's deflection board, stuck on with superglue. Artillery Commander/Engineer, 68kMLA Liberated: LCII , III+, IIci, Q700, 800, and 840av, P550, 410 Contraband: Beige G3/300 MT o/c 400mhz, (2) 6100's Hotline mirror server: 68k.dyndns.org
cory5412 68KMLA Comrade-in-Arms USA 4679 Posts	Posted - 11 Mar 2003 : 21:55:18 that, by the way, was a good movie IIRC..... I think that running like this shouldn't be too much of a problem if you do provide it a good way of ventilation... also, you could do the only 5 volts to the fan thing..... Official 68k videographer Official MLA TourGuide
maclover5 LC Doctor/Hot Rodder Australia 5830 Posts	Posted - 12 Mar 2003 : 03:49:04 <Ultra-Dumb@$$Mode>What movie?</Ultra-Dumb@$$Mode> -------------------------- Give your dreams a chance.™ - Apple in the mid '90s Warrior maclover5 68k Macintosh Liberation Army Number of 68ks Liberated: 7
foetoid Full Member USA 554 Posts	Posted - 12 Mar 2003 : 05:52:44 quote: <Ultra-Dumb@$$Mode>What movie?</Ultra-Dumb@$$Mode> cool runnings ________________ foetoid, that's (fee-toy-duh) http://www.foetoid.doesntexist.com
Flash Full Member Australia 637 Posts	Posted - 12 Mar 2003 : 06:36:04 I have two Q605 servers, with no fans, that are never switched off. They've been on for about three or four months now. Occaisionally I have to reboot, and if I'm going away for a few days then I switch 'em off but apart from that they are always on. So far I've had no problems! go figure - - - - - - - - - - - - - A little knowledge is a dangerous thing, but it sure beats a blank stare for starting a conversation. 68k ParaMedic
Jobf Junior Member United Kingdom 162 Posts	Posted - 12 Mar 2003 : 08:03:07 quote: I have two Q605 servers, with no fans, that are never switched off. They've been on for about three or four months now. Running at 25mhz? 33mhz? 40mhz? No fans? You removed them? Also out of interest, what OS are they running, how much mem, what apps & whats the longest they've gone without a reboot? = (Yes, 40 can reliably be done if you replace the clock driver with a higher rated part!) See: http://ilove68k.hp.infoseek.co.jp/mac/475/4752.html Run it through Babelfish and you get the gist. I don't have a Centris 650 logic board lying around tho! Jobf
G4from128k Full Member USA 873 Posts	Posted - 12 Mar 2003 : 08:16:24 quote: I have two Q605 servers, with no fans, that are never switched off. They've been on for about three or four months now. Occaisionally I have to reboot, and if I'm going away for a few days then I switch 'em off but apart from that they are always on. So far I've had no problems! Any idea how hot the CPU is getting in there? You might want to be careful because high temperatures (above about 60-80 C in the silicon) will shorten the life of the chip. It would be sad if your Q605's died after a few thousand hours of running at high temps. G4From128k by Day: Mild-Mannered Engineer and Trapeze(tm) Artist by Night: Colonel of Truth, Justice, and the Macintosh Way Reserve Officer in 68kMLA Cantankerous Coot Contingent
Trash80toG-4 NIGHT STALKER USA 2899 Posts	Posted - 12 Mar 2003 : 08:26:10 quote: * = (Yes, 40 can reliably be done if you replace the clock driver with a higher rated part!) See: http://ilove68k.hp.infoseek.co.jp/mac/475/4752.html Run it through Babelfish and you get the gist. I don't have a Centris 650 logic board lying around tho! GobbeldegookFish linkage. Wasn't there something about the serial port transceivers and SCSI IC too, or was that the 630? jt . Trash Hauler: call sign: eight-ball C.O. AC-130H SpecOps 68kMLAAF Edited by - Trash80toG-4 on 12 Mar 2003 08:29:14
Trash80toG-4 NIGHT STALKER USA 2899 Posts	Posted - 12 Mar 2003 : 08:35:47 quote: Any idea how hot the CPU is getting in there? You might want to be careful because high temperatures (above about 60-80 C in the silicon) will shorten the life of the chip. It would be sad if your Q605's died after a few thousand hours of running at high temps. PSU components suffer the same fate, as I understand it, that fan cools it too. Standing the pair of them on end with the fan holes stopped up, (feets to feets for a wedgie effect?) to see which one lasts longer using just convection cooling might be an interesting experiment. jt ™. Trash Hauler: call sign: eight-ball C.O. AC-130H SpecOps 68kMLAAF
QuadraJets Junior Member USA 344 Posts	Posted - 12 Mar 2003 : 19:38:39 quote: * = (Yes, 40 can reliably be done if you replace the clock driver with a higher rated part!) I have two of em overclocked to over 40mhz without replacing the 88920 PLL chip. one running fine at 42mhz in the dataline box, and the other is the 605 server at 41mhz. Anyone got a dead 575/580/quadra 800 mobo? I wanna go for 50+ (who needs serial ports?) Artillery Commander/Engineer, 68kMLA Liberated: LCII , III+, IIci, Q700, 800, and 840av, P550, 410 Contraband: Beige G3/300 MT o/c 400mhz, (2) 6100's Hotline mirror server: 68k.dyndns.org Edited by - quadrajets on 14 Mar 2003 16:16:41
Flash Full Member Australia 637 Posts	Posted - 13 Mar 2003 : 06:15:16 quote: Running at 25mhz? 33mhz? 40mhz? No fans? You removed them? Also out of interest, what OS are they running, how much mem, what apps & whats the longest they've gone without a reboot? The fans are still sitting there, just unpluugged. One 605 is a stock standard 25mHz LC040 with 20MB RAM, the other has been modified to run at 33mHz (with a 33mHz 040 - not an overclocked 25mHz processor) and has 36MB RAM. They are both running a slim OS8, and WebStar server. The last time they were switched off was at least six weeks ago...could be longer, and they were only off for a day or two. The last reboot for one of them was a week ago, and I can't remember when before that. gets curious about temperature and having never checked, opens up a pizza box* God damn that's hot! You could fry an egg on it!!! plugs fans back in on both boxes I think I might run them in cool mode for a while - - - - - - - - - - - - - A little knowledge is a dangerous thing, but it sure beats a blank stare for starting a conversation. 68k ParaMedic
Jobf Junior Member United Kingdom 162 Posts	Posted - 13 Mar 2003 : 06:27:24 quote: gets curious about temperature and having never checked, opens up a pizza box* God damn that's hot! You could fry an egg on it!!! plugs fans back in on both boxes I think I might run them in cool mode for a while Hehe! I have a 25mhz full 040 in my LC475 that I'm planning to overclock to 33mhz. Whats the difference to using a 33mhz 040? Will it just run a bit hotter? Are there any other implications? Because its a 25mhz version should I use a slightly bigger heatsink/fan?? Jobf http://jobf.kicks-ass.org
Flash Full Member Australia 637 Posts	Posted - 13 Mar 2003 : 07:23:29 The difference is that a 25mHz processor is only "rated" to run that fast. In practice all processors have a little built-in headroom so generally you can run them a little faster. I havn't heard any bad stories about people overclocking 25 to 33mHz (or 33 to 40). I'm not sure whether it is heat that makes a processor slow (that kinda makes sense because when a conductor is hot, the resistance goes up) or if it is because the processor has slower internal components. I have heard rumours (that may or may not be true) that the processors are all created on the same production line, and they are stamped with a MHz rating after being tested. - - - - - - - - - - - - - A little knowledge is a dangerous thing, but it sure beats a blank stare for starting a conversation. 68k ParaMedic
appleseed Starting Member Australia 40 Posts	Posted - 13 Mar 2003 : 18:16:18 My Lc475 clocks @ 25Mhtz. Are you souping up your machines with a new board to get a faster clock speed. ? I use OS-8 which I've managed to cut down to 4.5 Megs & bots up in just over 45 seconds. That gives me a bit of extra speed. Lean & mean. Thanx Folks
Flash Full Member Australia 637 Posts	Posted - 14 Mar 2003 : 06:10:22 You can overclock any LC475/Q605 to 33mHz by desoldering and resoldering a couple of resistors on the motherboard - beware it is fairly fiddly work though, and if you lose the resistor then you're stuffed. Check out the Clock Chipping Homepage for details.... http://homepage.mac.com/schrier/mhz.html cheers Flash! - - - - - - - - - - - - - A little knowledge is a dangerous thing, but it sure beats a blank stare for starting a conversation. 68k ParaMedic
QuadraJets Junior Member USA 344 Posts	Posted - 14 Mar 2003 : 08:59:48 quote: I havn't heard any bad stories about people overclocking 25 to 33mHz (or 33 to 40). I have 25mhz overclocked to 40+ without any issues, my 605 has been running for almost 6 months without a reboot. Artillery Commander/Engineer, 68kMLA Liberated: LCII , III+, IIci, Q700, 800, and 840av, P550, 410 Contraband: Beige G3/300 MT o/c 400mhz, (2) 6100's Hotline mirror server: 68k.dyndns.org
Jobf Junior Member United Kingdom 162 Posts	Posted - 14 Mar 2003 : 09:09:53 quote: I have 25mhz overclocked to 40+ without any issues, my 605 has been running for almost 6 months without a reboot. OK nice, but what about the 'unable to lockon' issues that are mentioned on the web. How did you combat this? Did you follow these instructions? http://www.google.co.uk/search?q=cache:fHYaD7rP8gcC:homepage.mac.com/~schrier/q605.html+40mhz+605&hl=en&ie=UTF-8 Jobf http://jobf.kicks-ass.org
QuadraJets Junior Member USA 344 Posts	Posted - 14 Mar 2003 : 16:09:06 I followed these directions to overclock both of my 475s: http://gabezing.sytes.net/LC475-40Mhz-E.html This method requires a separate oscillator around 20mhz. I got mine from a dead 6100 mobo; they are SMT, so it requires a little extra soldering The resistor swap is easy, compared to the procedure for the 6360/6400. Those resistors are at least 1/3 the size of the ones on the 475 mobo. Artillery Commander/Engineer, 68kMLA Liberated: LCII , III+, IIci, Q700, 800, and 840av, P550, 410 Contraband: Beige G3/300 MT o/c 400mhz, (2) 6100's Hotline mirror server: 68k.dyndns.org Edited by - quadrajets on 14 Mar 2003 16:17:51
cory5412 68KMLA Comrade-in-Arms USA 4679 Posts	Posted - 14 Mar 2003 : 21:44:43 I plan on running my IIsi fanless... well... it'd be nice.... maybe I'll have to find a way to get a solid state media internally for the system to boot off of, then run programs and/or store documents externally somewhere.... on a server :) Official 68k videographer Official MLA TourGuide
maclover5 LC Doctor/Hot Rodder Australia 5830 Posts	Posted - 14 Mar 2003 : 22:27:09 quote: I plan on running my IIsi fanless... well... it'd be nice.... maybe I'll have to find a way to get a solid state media internally for the system to boot off of, then run programs and/or store documents externally somewhere.... on a server :) Official 68k videographer Official MLA TourGuide Maybe you could continue the IIsi netbooting project that we were talking about many months ago? -------------------------- Give your dreams a chance.™ - Apple in the mid '90s Warrior maclover5 68k Macintosh Liberation Army Number of 68ks Liberated: 7
cory5412 68KMLA Comrade-in-Arms USA 4679 Posts	Posted - 15 Mar 2003 : 23:51:50 actually, boredomconquersall found a nifty little SCSI card reader "thing" that will work on system6... and if it'll work on system 6, nearly any mac should be able to boot from it! and if THAT is true, I'll have a wonderful little system sans-HDD Official 68k videographer Official MLA TourGuide
catsdorule Senior Member Canada 1627 Posts	Posted - 16 Mar 2003 : 13:03:11 ML5: Someone would have towrite a cp or find the rare one, that project would be pretty hard none the less. -danny You! What PLANET is this! -- McCoy, "The City on the Edge of Forever", stardate 3134.0 ------- 68k Macintosh Liberation Army 68k Macs Liberated: 3
cory5412 68KMLA Comrade-in-Arms USA 4679 Posts	Posted - 18 Mar 2003 : 12:18:39 <singing> skip skip; skip to the store skip skip; skip the netbooting thing skip skip; let;s boot off of internal SCSI CompactFlash reader skip skip; it's bigger than most IIsi hard drives anyway </singing> I'll have to ask boredom, but the internal CF readers aren't THAT much expensive anyway, and we could load applications and documents from any file server... if this proves to be inexpensive, and working it could be the wave of the future of silent computing... even on 8.1 with ethernetted, fanless MicroQuadras Official 68k videographer Official MLA TourGuide
catsdorule Senior Member Canada 1627 Posts	Posted - 18 Mar 2003 : 15:00:17 I just want to pure netboot a 68k. -danny You! What PLANET is this! -- McCoy, "The City on the Edge of Forever", stardate 3134.0 ------- 68k Macintosh Liberation Army 68k Macs Liberated: 3
cory5412 68KMLA Comrade-in-Arms USA 4679 Posts	Posted - 13 Apr 2003 : 02:11:47 get in line bucko! JT said something about being able to load a kernel from a very small volume, that has network booting 'instructions' per se.... I'd also love a lab of IIsis booting at the command of an AWGS95... Official 68k videographer Official MLA TourGuide

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