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As far as I know its not possible to keep the overclocked frequency all the time, I have the pro board and haven't been able to do it. Its not really necessary though, the ramp up is very intelligent and instant as soon as load appears.
You're fine with the frequency at 350khz, set your...
It should be fine, there are reports of people running the engineering samples at 1.45v and over for months with no problems.
Disabling C1 C3 and C6 doesn't actually make it idle at the overclocked frequency btw, it just doesn't report that its idling at 1.6ghz to the OS anymore. CPU-Z shows...
Last I heard it was supposed to be more like 20%, and even that is hard to believe. Remember its just a die shrink, not a new microarchitecture.
As for the op, I'm not sure you being an engineer or an old person qualifies you to guess at whether or not Intel is lying.
I saw a difference from stock turbo (3.7ghz) to 5.0 ghz when streaming with FMLE and playing some games, but 4.4~ is probably more than fine for that as well. It does speed up video encoding though
I was running my overclock with the PLL at 1.80625 because of a recommendation from someone, but when I turned it back to 1.8 (the default) its still stable and runs about 3c cooler under small FFT load
I'm running a P8P67 pro with a 2500k at 5ghz, with the voltage set as 1.36v. I have speedstep off but the cpu still idles at 1.6ghz, then ramps up to 5ghz under load, is this working as intended? From your write up it makes it seem like disabling enhanced speedstep and speedstep would make it...
I think generally extra bandwidth is better than tighter timings, but I'm pretty sure the performance benefit isn't something you'll notice or even care about, apart from synthetic benchmarks (maybe for video encoding)
My configuration is nearly identical to yours, except I have 1 c300 and 2 F3s, with no RAID arrays, and I have no issues. Did you try disabling the RAID on the 2 F3s?
I think an EFI update will fix your sleep issue, as I believe PLL overvoltage is recommended. Also when I had speedfan 4.42 it wasn't reading the temps correctly for my 2500k on a P8P67 pro, I had to get the 4.43 beta. Or just use CoreTemp, RealTemp etc, I know for sure CoreTemp reads it correctly