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View Full Version : Seen a portable AC adapter, will it work with a G750JH?



BroPyp
03-18-2015, 07:57 PM
So yeah, as we all know, power on battery is dreadfully limiting to the point where loads of games become unplayable. If there is a way to prevent the 780M from throttling to 135Mhz, I would like know how to do that, be it a vBIOS flash that has been confirmed to work on the UK model of the G750JH. I won't do anything related to bios flashing without fully researching it beforehand.

The reason I need this is because I travel to university every day and the train journey is about 40 minutes, so I had to find a portable power solution and it looks like I might have. As far as I know (so correct me if this is wrong) the whole laptop itself needs around 230watts under load, and the "powergorilla" claims to output as much as a mains outlet, depending on how "power-hungry the device is." It has a 20000mah battery and also claims to provide around 6 hrs of laptop power (so with a G750JH I would expect around 2 extra hours when gaming heavily.) The question I'm asking about that is whether or not all the power will come from the external battery, or if it will draw say 90watts from the laptop battery itself and say 100 watts from the powergorilla, resulting in a total 190watts of hybrid power (battery and "mains.") I would even be happy to run my 780m at around 600-650mhz if that slightly lower amount of power becomes a bit of a bottleneck.

Here is an amazon link to the product I'm talking about:
http://www.amazon.co.uk/Powertraveller-Powergorilla-Multi-Voltage-Portable-Charger/dp/B001FQP1MK/ref=sr_1_5?ie=UTF8&qid=1426707065&sr=8-5&keywords=portable+laptop+charger

Let me know guys!

hmscott
03-19-2015, 02:00 AM
So yeah, as we all know, power on battery is dreadfully limiting to the point where loads of games become unplayable. If there is a way to prevent the 780M from throttling to 135Mhz, I would like know how to do that, be it a vBIOS flash that has been confirmed to work on the UK model of the G750JH. I won't do anything related to bios flashing without fully researching it beforehand.
The reason I need this is because I travel to university every day and the train journey is about 40 minutes, so I had to find a portable power solution and it looks like I might have. As far as I know (so correct me if this is wrong) the whole laptop itself needs around 230watts under load, and the "powergorilla" claims to output as much as a mains outlet, depending on how "power-hungry the device is." It has a 20000mah battery and also claims to provide around 6 hrs of laptop power (so with a G750JH I would expect around 2 extra hours when gaming heavily.) The question I'm asking about that is whether or not all the power will come from the external battery, or if it will draw say 90watts from the laptop battery itself and say 100 watts from the powergorilla, resulting in a total 190watts of hybrid power (battery and "mains.") I would even be happy to run my 780m at around 600-650mhz if that slightly lower amount of power becomes a bit of a bottleneck.
Here is an amazon link to the product I'm talking about
http://www.amazon.co.uk/Powertraveller-Powergorilla-Multi-Voltage-Portable-Charger/dp/B001FQP1MK/ref=sr_1_5?ie=UTF8&qid=1426707065&sr=8-5&keywords=portable+laptop+charger
Let me know guys!

BroPyp, the G750JH/JZ/JY are 230w power hungry beasts, and it is tough enough just finding an alternative power adapter - there aren't any at 230w - and this solution is no different, it doesn't have enough power.

There have been some hybrid powered laptops recently, power from battery and AC are used for crucial moments - but the ROG G750/G751 series aren't one of those. So, no that won't work either. And, those are designed for full AC power, and likely wouldn't work with less than the full AC current either.

If you are on a train, there should be a car with power available. Talk with "train people" and ask where the convenience outlets are in the cars. Sometimes there is 1 or 2 cars in the train with upgraded power, find them.

So far I haven't found a solution either. You could write to these guys, the makes of this unit, and pose your need to them and ask them to please make a solution that will deliver 230w of power for the G750 and G751 series, there would be a market, maybe not huge, but steady.

For now, find games that respond well to the Nvidia Battery Boost tuning...

Ditch the brick and game up to twice as long with NVIDIA Battery Boost
http://www.geforce.com/hardware/technology/battery-boost/technology

GeForce GTX 900M: The World’s Most Advanced Gaming Notebooks
http://www.geforce.com/whats-new/articles/geforce-gtx-900m-laptops-available-now

BroPyp
03-19-2015, 07:03 AM
Battery boost doesn't work on the 700m series, sadly :/

hmscott
03-19-2015, 09:49 AM
Battery boost doesn't work on the 700m series, sadly :/

BroPyp, right, sorry.

Well, how about tuning with Nvidia Inspector?

Nvidia Inspector - FPS Limiter Tutorial
https://www.youtube.com/watch?v=pH9D__g1yqs

Nvidia Inspector - FPS Limiter Resetting FIX!
https://www.youtube.com/watch?v=lKgC3CdZYh0

Nvidia Inspector Download
http://www.guru3d.com/files-details/nvidia-inspector-download.html

Lots of online help for tuning with Nvidia Inspector, lots of youtube videos too.

Please let us know if you find good configuration solutions for your games :)