According to readers from Xlr8yourmac, the Radeon 3870 (retail card sold by ATI) behaves strangely since the recent Mac OS X 10.5.7 update: it is more noisy than with the Mac OS X 10.5.6.After several tests, some readers identified that one could bring back the noise level to the original one by adding the old set of extension entitled: "ATIRAdeonX2000". If this solution seems to work, we are a bit surprised. Indeed, those extensions have no effect on the fan rotation speed, as it is managed automatically by the graphic card depending on the temperature of the chips. We suspect that the new extension set delivered with Mac OS X 10.5.7 might have a bug at the power management level which could explain such a behavior. Only in-depth tests will allow us to conclude.
