name='Kempez' said:
Personally I leave virtualisation on as it's nice and useful
Unless you actually run any virtualization software, I would say it's not needed at all. But it's not doing any damage having it on. I don't think there will be any effect on your OC either way. If you do run virtualization software during the overclock, I would think it did more good than bad since it allows for better communication between the host machine(physical machine) and the guest machine/machines.
"Built-in Intel® Virtualization Technology (Intel® VT) reduces the need for compute-intensive software translations between the guest and host operating systems (OSs)." (Taken from Intels own site)
C1E (Enhanced Halt State) drops down the clockspeed and turns down the voltage when the system enter a halt state. Basically for power saving. It's argued alot of places if it makes any difference in stability when overclocking, but I would turn it off to be sure since it controls the voltsetting and clockspeed directly.
Same goes for EIST (Enhanced Intel Speedstep Technology). I notice you have written Enforced, but I think it's Enhanced that is the correct term. It basically makes the cpu frequency go down if your cpu is not working 100% with something. This is also for power consumption matters mostly. As Pyr0 said, it will probably mess with benchmarks. I would also go for turning it off for the same reason as C1E.
Execute Disable Bit is a security feature that according to Intel "can reduce exposure to viruses and malicious-code attacks and prevent harmful software from executing and propagating on the server or network". I have no idea how this is affecting an overclock though.
Limit CPUID Maxval is not needed unless you run Win2k > as I understand it.
sorry.
