Port Power Consumption (2017 Blade 14)

Discussion in 'Systems' started by wesley27, May 2, 2017.

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  1. wesley27

    wesley27 Active Member

    Hey guys,

    I have the 2017 Blade 14 with the 7th gen kabylake. I use an external monitor nearly every day for hours. The HDMI port on the Blade saps quite a bit of power as it's hooked up to the GTX 1060, so my battery life while using my monitor is subpar compared to when I'm not.

    The better option would be to use the USB-C port and an HDMI adaptor, as that's connected to the CPU and will therefore use less power.

    So I am going to buy an adapter. I currently also have a small USB hub with ethernet plugged into my Blade while using my monitor - it has an ethernet, a mouse, and a headset plugged into it, then all plugged into my Blade. So I figured I'd just buy an adapter that does it all via the USB-C port.

    I was wondering how you guys thought the power consumption would compare. Specifically, I was looking at this adapter. Do you guys think having everything plugged into this and then my Blade's USB-C port would still use less power than using the HDMI port? Or would it be a waste of money, and I should just keep using my USB 3.0 adapter and the HDMI port?

  2. wesley27

    wesley27 Active Member

    Anyone have any thoughts on this?
  3. Katana_x_II7

    Katana_x_II7 Well-Known Member

    My thought is.....if you are using an external monitor why not just plug the blade in? The external monitor needs a source of power, so there is a power outlet somewhere near by. That seems like the more reliable solution in the long run, especially in a couple years once your battery life starts to decay.
  4. Joikansai

    Joikansai Well-Known Member VANGUARD

  5. wesley27

    wesley27 Active Member

    @Katana Yes in a couple years, sure, when my battery starts to decay. I don't want to intentionally harm my battery and increase the rate at which it's lifespan is dying. I don't want to plug in if its above 15%.

    @Joikansai I already have a monitor, I don't need one, although that thing looks pretty cool.

    I was really wondering if anyone thought everything (monitor, mouse, headset, ethernet) being plugged into my Blade's USB-C port (uses integrated graphics) would use less power than my current setup, where my monitor is plugged into my Blade's HDMI port (uses GTX 1060) and everything else is plugged into a normal USB port via an ethernet/usb hub.
  6. Joikansai

    Joikansai Well-Known Member VANGUARD

    Really? I don't know about plug in and battery life in future things, but since 2006 i always plug in my Vaio, since 2012 MacBook Pro, since 2014 Razer Edge at home, all devices still has not bad battery life on go about more than 2 hours normal use...maybe Vaio about an hour? Won't they stop charging at 100% and if we are more using the power adapter it will save more battery life, am I wrong?
  7. Katana_x_II7

    Katana_x_II7 Well-Known Member

    This is correct. Plugging in a device does not harm the battery in any way. I have a macbook air that ive been using for 4 years, and its been plugged in 90% of the time, and i only have about 76 cycles on it, and the battery still lasts pretty much as long as it did when i got it. Continuously draining your battery and charging it back up again is what will take some of its life away, because batteries only have a certain amount of "cycles" in them. Usually you start to see a decent decay around 300 cycles which is when it starts to only hold about 85%ish of its battery life.

    tl;dr keeping your laptop plugged in doesnt kill the battery faster
    Joikansai likes this.
  8. wesley27

    wesley27 Active Member

    @Katana Doesn't it start charging again once it hits 90%? Thanks, though.
  9. Katana_x_II7

    Katana_x_II7 Well-Known Member

    What do you mean exactly? If its plugged in with full battery it shouldnt be charging, which therefore shouldnt be affecting your battery in any way. Im not quite understanding what you mean.
  10. Metolius

    Metolius New Member

    Running down the battery and charging it every day will reduce the battery life over time.

    The two bad states for new laptop batteries are too low, as in 1% for a long time, or too high, as in over 100%. The former can result in the battery never charging again, and the latter in a fire. In general you don't need to worry about either of these scenarios, because the charging hardware and windows will keep you from either too high or too low charge states.

    To directly answer your question - buying a new USB hub so that you can continue to waste battery life (in a more efficient way) is a double waste of money. You are on the right track though, since the integrated graphics will use way less power than the GPU. The output to the display is probably similar in either case. It's a good solution if you can't or won't plug in the laptop. Just plugging in will save your battery and the new hub costs.

    Note - I use my 2015 blade plugged in all the time (charge level between 94-100%), and it still shows 95% battery health.

    Hope this helps.
    wesley27 and Joikansai like this.
  11. wesley27

    wesley27 Active Member

    @Metolius I wasn't buying it just for the power consumption, I was buying it so I could better organize the cables on my desk and minimize what needs to be visible. I was wondering if the power consumption would improve as well, but it appears that I have been doing things backwards as of late, so thanks for all the information guys.
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