Re: G5 fans racing
-- -- Illirik Smirnov This is a very, very common issue. Most of the time, its some PMU thing, but occasionally, it's faulty temperature readings. The low 40s C are acceptable processor temperatures; the 47C memory is strange but within reason. A DP of mine developed this issue, except the fan would just blast at random times until I shut it off. Turns out it was reporting 70C+ temperatures randomly; I wound up disassembling the thing and cleaning the fans and the like; that didn't work. I used it for a while with the fans forced to idle, but then I scrapped it for parts. On Sat, Aug 11, 2012 at 3:46 PM, arichic...@gmail.com arichic...@gmail.comwrote: Dual 1.8 G5. When I put it to sleep, sometimes, not every time, I come home and the fans are racing and it sounds like a 747 taking off. I already reduced speed in the system prefs. Before I reduced, the fans would come on once or twice an hour, but never loud racing. Since I reduced, the fans /never/ come on except in sleep mode. I would think in sleep mode /less/ power and heat would be generated. Anyone have a theory on this? I installed a temp monitor utility, and it tells me the processors are running about 105 degrees F; the memory controller heatsink at about 118 F. -- You received this message because you are a member of G-Group, a group for those using G3, G4, and G5 desktop Macs - with a particular focus on Power Macs. The list FAQ is at http://lowendmac.com/lists/g-list.shtml and our netiquette guide is at http://www.lowendmac.com/lists/netiquette.shtml To post to this group, send email to g3-5-list@googlegroups.com For more options, visit this group at http://groups.google.com/group/g3-5-list
G5 fans racing
Dual 1.8 G5. When I put it to sleep, sometimes, not every time, I come home and the fans are racing and it sounds like a 747 taking off. I already reduced speed in the system prefs. Before I reduced, the fans would come on once or twice an hour, but never loud racing. Since I reduced, the fans /never/ come on except in sleep mode. I would think in sleep mode /less/ power and heat would be generated. Anyone have a theory on this? I installed a temp monitor utility, and it tells me the processors are running about 105 degrees F; the memory controller heatsink at about 118 F. -- You received this message because you are a member of G-Group, a group for those using G3, G4, and G5 desktop Macs - with a particular focus on Power Macs. The list FAQ is at http://lowendmac.com/lists/g-list.shtml and our netiquette guide is at http://www.lowendmac.com/lists/netiquette.shtml To post to this group, send email to g3-5-list@googlegroups.com For more options, visit this group at http://groups.google.com/group/g3-5-list
Re: G5 fans racing
At 2:46 PM -0500 8/11/2012, arichic...@gmail.com wrote: Dual 1.8 G5. When I put it to sleep, sometimes, not every time, I come home and the fans are racing and it sounds like a 747 taking off. I already reduced speed in the system prefs. Before I reduced, the fans would come on once or twice an hour, but never loud racing. Since I reduced, the fans /never/ come on except in sleep mode. The power manager (PMU) is not happy. By default, it cranks the fans if anything is amiss -- better to crank the fan than to let the system cook. First thing to try is to reset the PMU. If that doesn't work, replace the battery. To reset the PMU: Shutdown. Disconnect the power cord. Press the PMU Reset button (aka the CUDA) ONCE. DO NOT press it a second time as that could crash the PMU. Wait 10 seconds then connect the power cord and boot. If the problem still occurs, then shutdown, replace the battery, and reset the PMU again. Um... while you're in there with the power cord disconnected, might be a good idea to carefully vaccuum. And make sure the fans spin freely... Note that both resetting the PMU and replacing the batter will also cause the PRAM/nvram to be reset. So after booting you should set the time, re-select the startup disk, etc. HTH, - Dan. -- - Psychoceramic Emeritus; South Jersey, USA, Earth. -- You received this message because you are a member of G-Group, a group for those using G3, G4, and G5 desktop Macs - with a particular focus on Power Macs. The list FAQ is at http://lowendmac.com/lists/g-list.shtml and our netiquette guide is at http://www.lowendmac.com/lists/netiquette.shtml To post to this group, send email to g3-5-list@googlegroups.com For more options, visit this group at http://groups.google.com/group/g3-5-list
