I recall when my MDD "windtunnel" was new, there was a German company, Verax I believe, who had a kit to fix heating and cooling problems that are common in most MDD G4 computers. One of the kits was a new CPU/Case fan that spun at a different RPM that drew less power and another kit was a new Copper Heatsink with twin mini CPU fans instead of a bulky large fin Aluminum Heatsink that is common in most G4 Towers. I know Verax makes other cooling systems for many other computers. Personally I try not to overtax my Power supply as my machine is pushing 5 years old and I do not have the money to keep up with the latest and greatest. I just cannot understand why people think that you must have half a dozen HD's in your Mac at once. With Large HD's abound its easy to have 1 or 2 HD's in any G4 Tower with capacities in the 250GB to 1TB range. Especially with Serial ATA PCI cards being rather economical, the Power draw from a Serial Power connector is less than of the traditional Parallel ATA ands the Cabling is thinner and smaller thus allowing for better Air flow. Peace, Luke R. On Sep 23, 2008, at 8:39 PM, johnnyg wrote: > Since this thread is still going, just one more comment on > pushing > the power supply limits. The more wattage/amperage you draw from a > power > supply, even keeping under the "rating", I think the bigger the > "spikes" > of electricity that all of the components get, and the more heat > generated overall on a constant daily basis. Many if not most > failures > are caused by heat....So by pushing the limits of a power supply, > you may > very well be taking life expectency from the MB and all the other > peripherals...I am old school so there may be better filters and > heatsinks nowadays but in this world of built in obsolecence, I rather > doubt they would be used. And I would rather error on the positive > side > and keep down the surges and heat, always trying to stay way under the > rated amps/wattages. > > John >