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Overclocking i5-4690k: Base OC vs Turbo Boost OC for Emulation

post #1 of 2
Thread Starter 
I'm trying to use Dolphin Emulation, which mainly only uses 2 threads. I've been using a G3258 OCed to 4.0GHz, but it occasionally lags (especially if I have a browser or other programs running in the background). I decided to get an i5-4690k and OC it.
Right now, I'm using a mATX HTPC case and a cheaper aftermarket cooler master low profile cooler that is better than the stock cooler (can take TDP ~130 watts). Thus, my OC potential is limited by heat.

My dilemma is whether I should use base overclock or turbo boost overclock. I currently have it at 1.150v core volt (mobo offset sometimes gets it as high as 1.164v) on turbo boost overclock, 4.2Ghz for 1-2 cores, 4.0Ghz for 3 cores, and 3.8GHz for 4 cores. My core temperatures are a bit warm but ok in Prime95- core 1-2 maxes out around the low-mid 80s'C, and core 3-4 maxes out at mid 70s'C. However, when I'm running Prime95 4 thread small FFT (tested with the threads spaced among 4 cores, and with task manager settings limiting the program to ONLY 2 cores), the turbo boost seems to be inconsistent - 4.2GHz sometimes, 3.8GHz sometimes, and sometimes running as low as the 3.5GHz base setting sometimes. So my problem is it seems to be inconsistently applying Turbo, or it downclocks for some reason after a certain time.

When I tried to do all 4 cores based-overclocked to 4.0GHz with additional turbo overclock, it overheats to mid 90s'C in Prime95 4 thread small FFT for cores 1-2, and high 80s cores 3-4. Regular base OC to 4.0GHz without Turbo OC gets me high 80s'C. So I'm assuming if I ease it down a bit more, I'll get stable temps.

My question is, if I'm trying to run 2 threads, should I overclock my base to ~3.8GHz OR should I keep my base at 3.5GHz + OC turbo boost to 4.2/4.2/4.0/3.8? The base OC option has lower boot stock speeds but more consistently higher speeds. The turbo boost OC has higher clockspeeds which is better for Dolphin, but Turbo is inconsistent and varies from none (3.5GHz) to max turbo of 4.2GHz. Is there any way to get Turbo to be consistent?
post #2 of 2
Thread Starter 
Should I disable turbo boost for overclocking? I assume it increases cpu voltage with an offset right?

Turbo boost allows cores to run at different speeds. Does regular overclocking allow this? (eg. have 3 cores running at max and 1 core running at idle if it has 0% load?)
Edited by Bluescreendeath - 10/3/16 at 3:35pm
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