Overclocking is about getting the core speed as high as possible while keeping the heat produced in check.
Hyperthreading increases the heat and lowers the core clock you can get stable.
So having an overclocked machine that has had hyperthreading turned off and turning it on without lowering the clocks would lead to unsuitable temps and instability.
You could re-enable it back in the BIOS yes.
But you want your temps to go over 100C and possibly damage the CPU?
The point of overclocking is to get the CORE speed higher, on an i7 950 you still got 4 super charged cores( if OC'd), compared to 8 very good cores. Mostly you will not notice a difference.
thanks for all your responses guys. I'd love an overclocked i7 950 with hyperthreading still on. As I've said on the other thread, I'll request PCS leave it switched on, even if it means a slighly lower clock speed
When overclocking we use our sewttings for stability. Once you receive the PC you're welcome to tinker with the settings, but bear in mind that this can result in your system crashing/having BSOD's.
You get more results overclocking with HT off across the board. Than you would clocking it stable with HT on.
Im sure if you wanted they could give you a stable clock with HT on..
But isn't the idea to get the best clock ?
To clarify in some applications that would take full advantage of the threads it may prove stronger. But fro 99% of games your much better of with fewer faster cores.