Asus p9x79 pro+3930K --shutting off "Turbo"?

Question

It appears that this Asus MB automatically boosts the clock rate to 3.8mghz (up from the stock 3.2), a Turbo mode.
While there are Asus utilities to achieve more agressive over-clocking, there's no obvious means by which to reduce the clock-rate to the stock 3.2mghz.
Anybody know how to do it?

Answer 1

Actually, you will not gain anywhere near that much in the way of cooler and quieter operation when you underclock a CPU. In fact, you will lose far more in total performance than you will gain in coolness and quietness. Some time ago I performed a test with my main system at both 3.9GHz ("Turbo'd"), 3.4GHz and 1.6GHz ("fail-safe"). As far as the CPU temperatures, there is barely any difference at all whatsoever in the maximum or minimum CPU temperatures (no more than about 2 to 3 degrees Celsius) between the three clock speed settings. What's more, the CPU cooling fan runs equally as "loud" at 1.6GHz as it does at 3.9GHz. (This is all because modern CPUs have a certain required minimum voltage just to even function at all; lowering that voltage below that minimum resulted in the system failing to even POST at even the minimum fail-safe clock speed.)
Thus, if you think that your CPU is going to overheat (or at least run significantly hotter than normal) at the default Turbo settings, then you should look into replacing your current CPU cooler with a better performing one.