Power Consumption: EPU, C-States, Speed Step and Speed Shift

MyLittleFella

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Oct 23, 2014
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Hi, I own a z270 Asus Tuf, and I know all of the mentioned features on the tittle work to save energy and lower the temperatures. Honestly, I don't care about temperatures or power consumption since my my Intel G4400 is running on 30ºC (86F) and 43ºC (109F) under 100% load. (Going to upgrade to 7700k on near future).

But my true question is about Speed Shift, If we check this picture by Intel:
TBAHVD3.jpg


It says, when you're running Skylake or Kaby Lake w/ Speed Shift disabled, you're still getting some lag/latency to switch frequencies and CPU Voltages... But, now that's the thing: since I leave all of those mentioned power features disabled to squeeze the most possible performance so, is it still happening to me/my rig? 'cause, if you see, here's a screenshot from CPU-Z:
1IEwSbj.jpg


The V-Core is always on 1.056 mV, and the multiplier is always on x33 - 3300MHz - 3.3Ghz.

So, to sum up, does the lag/latency happen or not? (On my situation).
 
Solution
No, there will be no latency because it's always running max speed. However, even without speed shift, the time to ramp up clockspeed is so small that the net result will be fractions of a percent in performance. I leave it enabled.

Be aware also that it only makes any difference in "bursty" loads, where you move from idle to active to idle again frequently. For example in a game, where the CPU will be kept up-clocked all the time anyway, leaving C-states enabled will make absolutely no difference.

EDIT: Where I live, leaving power saving features off and running my PC 24/7 would cost about $3 per month, or ~35 per year.
No, there will be no latency because it's always running max speed. However, even without speed shift, the time to ramp up clockspeed is so small that the net result will be fractions of a percent in performance. I leave it enabled.

Be aware also that it only makes any difference in "bursty" loads, where you move from idle to active to idle again frequently. For example in a game, where the CPU will be kept up-clocked all the time anyway, leaving C-states enabled will make absolutely no difference.

EDIT: Where I live, leaving power saving features off and running my PC 24/7 would cost about $3 per month, or ~35 per year.
 
Solution

MyLittleFella

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Oct 23, 2014
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Good to know mate, thanks you very much for your answer! :D