Did some testing earlier to see what core temps/heatsink temps trigger the turboboost to clock down from 3.46 to 3.33ghz using Intel Burn Test (Linpack). Now, this is the interesting bit: Case A Start from cold to windows, core temps reach 95C, starts throttling (3.46 to 3.33Ghz), SMC spins up fans, but the fans never get fast enough to allow the CPU to stay fixed at 3.46Ghz. Case B I fix the fan speeds in OS X to 1000RPM intake & exhaust fans and 2000RPM for the CPU fan. Restart into Windows (fan speeds are kept through a restart) and run IBT again. This time, it starts throttling (3.46 to 3.33ghz) at 65C core temp! Now, given I have never found a way to check actual CPU frequency in OS X, you can only really test in windows. It is a small change from 3.46Ghz to 3.33Ghz but the SMC must be thinking that if the fans are spun up then clock speed should be reduced? Or it is hitting the 125W power limits, but why would it at a lower temperature? *shrug* Could just be software errors but still seems weird to me. Anybody else want to test? I don't think this happened with my original W3520 but still.