A few words on power management (Ezbook 3 Pro, v4)

[John]

I’ve been playing with the power management in the bios of the Ezbook 3 pro v4. Obviously, we all know that if you disable the the power limit you get better frames in video games (and slightly better performance in normal tasks), but what if you were trying to get the best battery life?

After playing around with the settings, I’ve come the conclusion that the leaving the power limit off is still the best. Maybe you’ll get a little more power by setting the limit to 9, but really the default settings allow it to burst well above that limit for short periods of time and you’d lose that advantage.

Turning off the speedbust is also a horrible idea because the quick boost to 2.2ghz gives you great performance and better system response for a short period of time. This actually gives you better battery life by getting your task done quicker. Turning the option off limits you to 1.1ghz ad taking twice as long to do anything.

If you’re actively trying to maximize your battery life, your best bet is to set battery saving mode and not playing video games. Just browsing the internet and watching youtube on default or no power limit doesn’t change anything.

This laptop is quite amazing. I’m usually getting 6 hours of battery life but can get to 7 hours.  Best 250 I’ve ever spent!

[Sx C]

yeah i tried messing around with the setting and there are usually little to no changes, we will need throttlestop to support the apollo lakes before we will notice a appreciable increase in battery life.

[John]

Sx C wrote:

yeah i tried messing around with the setting and there are usually little to no changes, we will need throttlestop to support the apollo lakes before we will notice a appreciable increase in battery life.

In the BIOS you can set speedstep to disabled, and that will be lock the clock speed on all 4 cores to 800mhz.

[Kalle]

I thought the power restriction was removed on the v4 models? Or it was just “unlocked” in the bios so the user can choose to unlock it there by themselves and not rely on some janky register hack? 🙂

[Nick]

Fresh windows, all new drivers, except two with code 10, intel graphics set to max performance, 6w, getting 5:30 h from 100. When it just came to me without fresh install had 6:30 h. Dunno why the lower times.

[Anon]

Nick wrote:

Fresh windows, all new drivers, except two with code 10, intel graphics set to max performance, 6w, getting 5:30 h from 100. When it just came to me without fresh install had 6:30 h. Dunno why the lower times.

I’m getting about 9-12 hours at 40% brightness. But it’s mostly me studying pdf files. Turning off wifi certainly helps a bit.

Also you need to consider that Adobe flash consumes a lot of battery life. It is about an hour difference depending on your usage.

[John]

Kalle wrote:

I thought the power restriction was removed on the v4 models? Or it was just “unlocked” in the bios so the user can choose to unlock it there by themselves and not rely on some janky register hack?

It’s an unlocked bios, so you can disable the power settings if you like.

 

I also had 6:30 originally but I’m now getting 5:30. I think it has to do with updating the graphics drivers but I’m not sure.  Resetting the bios to defaults doesn’t seem to help.

[Author]

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