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Wow, this is very cool. The unit isn't under warrantee unfortunately -- on the other hand, that makes for the option of hacking it more attractive. On the other, other hand it makes the downside of blowing it up much greater. Now, I did a bunch more fiddling around last night. I found a very nice temperature monitor program called, er, Temperature Monitor http://www.bresink.com/osx/TemperatureMonitor.html Interestingly enough, all my temperature sensors are between 34 and 38 degrees C -- except that CPU B Core 2 runs about 47 degrees, the memory controller at 52 and the graphics chip at a sweltering 57 -- while according to "top" or "Activity Monitor" the CPU is 90% inactive and my house is a little chilly today. I don't believe that these sensors are correct. I don't believe the temperatures are so very high, and therefore I don't think more fans are going to fix it (though the idea of physically muffling the sound will work I think and I also think that the sensors will definitely prevent me from runaway overheating). A little more research led me to the idea of "thermal recalibration". Apparently, a batch of these G5s went out without their power sensors being recalbrated (I suppose I should consider myself lucky if this is in fact the cause -- I could have had it badly calibrated the other way). Now supposedly you need to run a special program called "Thermal Recalibration" (clearly written by a friend of "Temperature Monitor") that only Mac techs have -- and a store would charge you $50-100 to run (it's not just the money -- but bringing my whole machine in, UGH -- can't I just pay $100 and get the program?) However, a friend of mine might have it, or I might be able to get the techs at work to get it. Stay tuned!!!! And thanks for the data. This might well have been John's problem or some variant thereof. >From what I've gleaned, running Thermal Calibrator would get done after the mother board was replaced... On 10/23/07, van Sinn <vansinn@post.cybercity.dk> wrote: > Tom Ritchford wrote: > > My Mac Quad G5 would have been the greatest machine ever except it's > > completely loud -- the fan goes on no matter what and trying > > everything online was hopeless. I've tried for a year to fix it and > > nothing working. > > > > I've been looking to find a case to put it in that will suppress the > > sound but everything I search for, I find PC-style cases that you > > build a computer in, not a larger case that I can put the machine in. > > > > Any ideas as to where to find such a thing? > > Sound-proofing boxes does exist; be creative with your Google searches.. > > You may be able to silence your G5. > It has lotsa slots on it's sides, letting noise out. In car accessery > stores you can buy self-adhesive foam pads which does a great job > sucking fan and harddrive noises. Here in DK two versions are available. > One is made of a somewhat dense multicolored material, which is good > against rumble noises, and a softer gray pad which is good at sucking > fan hiss and drive whining. the latter works better for computers. > Simply cut it to size for i.e. the sides, buttom and top of the box, rip > off the protective plactic foam and stick it to the surface. > > However, do ensure good airflow through the box. Yeah, I saw a Sun workstation killed in my youth that way. :-( > I don't remember how the front and rear of the G5 is layed out. IMO, a > good box should have 120mm fans both front and rear. While I'm sure the > G5 doesn't have this, hopefully it has decent venting holes/grill on the > front and suitable fans on the rear. If not, you may have a problem when > you cover the venting at the sides of the box with the foam stuff. > > Noisy harddrives (if they are so..) can be replaced. I got the drives myself, they're quite quiet. > Fans can be replaced. When shopping look for the CFM/dBa params. > > The real problem is small (50/60/80mm) diameter PSU/CPU/box fans et al.. > Pabst makes some of the best 9/12dBa 80mm fans, but they still have ball > bearing noises. Mounted on rubber, they work fine. I simply glue them on > using a thick layer of glue for diving wetsuits. Can be ripped-off > again, so no problem.. > > Because the G4/5 series use PowerPC CPU's, the usual PC world heatsink > replacement parts doesn't apply; here creativity is a must ;) > I can solve most drive and fan issues in my G4 dual 800, but have to > build some duct over the CPU module heatsink to fix the 50mm fan noise. > > > A few examples of lownoise 120mm fans: > > http://studiedata.dk/shop/noctua-nf-s12-800-blaeser-6024p.html > http://studiedata.dk/shop/noctua-nf-s12-1200-blaeser-5993p.html > > Yup, danish, so a few explanations; CFM/dBa.. should be understandable. > They feature SSO-bearings (Self Stabilizing Oil pressure bearings). > The dBa ratings are with/without the noise adaptor thingy. > > -- > rgds, > van Sinn > > -- /t http://ax.to ......... extreme NY arts and music calendar http://ax.to/tr ....... my secret little little... http://ax.to/radio ... my little radio station (on intermittently)