At 20:00 -0800 3/7/12, Wayne Stewart wrote: >According to iStat pro I'm running 2 degrees Celsius hotter at idle >with both processors running. Using CHUD tools to turn on nap dropps >my idle temp about 20 degrees C. >At 1.5ghz there wasn't any problems. 1.58 is new to me so I'll be >keeping an eye on the temp. If I get worried I'll see about adding an >extra fan. One thing I may do anyways is pull the plastic grill off >the back of the G4. It covers up a lot of the rear air holes. > >On Mar 7, 10:38 am, "Jesse St.John" <jesselorenstj...@gmail.com> >wrote: >> how are you effectively cooling these as my mdd runs relatively hot >> already? and i would lke to do this but i am a chicken and i dont >> want to ruin a good thing. i witnessed online a gentlemen who showed >> me the resistors on the cpu chip itself to adjust, but decided not to >> do it until i had one myslef to try out. >
Something about overclocking and temperature that is a bit difficult to find information on: Faster processors typically use a phase locked loop internally to multiply the applied clock frequency by a small integer - less than 100. I donno about G3 and G4 but anything running over a GHz internal is that way. It's just too hard to deliver a GHz clock to a pin on the circuit board. They also contain internal temperature sensors that can have microcode access that allows for changing the multiplying integer. When the chip gets too hot it can be automatically slowed down without telling you about it. The external clock, the one you're mucking with using changed components need not change at all. When you ask software a question like "what is my frequency?" you really need to find a standard clock somewhere that can be used for comparison. Options are things like GPS, WWV, a rubidium standard you purchase for more than you paid for the computer. Otherwise the computer will assume the comparison is to be made from what it thinks is its clock frequency. Time of day from the NNTP time transport protocol is not likely to be good enough. -- -->A flashlight: is a metal tube used to store dead dry cells. <-- -- 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
