I have several Dell servers (R410, R710 and R910 models) with some running Windows Server 2003 and other running Windows 2008 Server, all 64 bit.
What I have noticed is that even under heavy application load, the CPU clock speed of each of the cores (I use TMonitor to view) is stuck at just below 1.7GHz, even though the CPUs are rated at 2.13 GHz, and 2.4 GHz + turbo (each machine has 2 CPUs, with some machines having E5620 and other machines having E5506).
I get much better performance from the same exact apps on my older X5160 machines as those CPUs idle at 2.0GHz but immediately ramp up to their rated 3.0GHz speeds when my apps run.
Example: On an X5160 at 3.00 GHz machine processing a bulk email list to 50,000 recipients finishes processing in one third the time compared to 2.4 GHz E5620 machine which never leaves the 1.7GHz processor idle core speed.
Now, my question: Is there any way to disable the processor idle/sleep modes on these newer Intel E5506 / E5620 chips so that I can have them running at their rated speed?