May 1, 2019
My lenovo Ideapad 310-15ISK was working fine at first but after a while it started having problems charging when running programs which used NVIDIA graphics card instead of the Intel one, originally it came with a 65W AC adapter, but I've heard it could run better with a 90W one, can I substitute one with another is all the other stats are the same?(e.g output/input voltage)


Yes if both adapters are for your general Lenovo model then it's fine. I swap between 60 and 90 and even 120 watt models with T and W Lenovos without issues. Of course on the W models the weaker power adapters don't work well, but other way around it's fine.
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Jul 23, 2019
Check the output voltage, that's the most important factor. You can find those on the back of your adapter, if they are same, you can use it.
I wouldn't recommend it if your option. There is no advantage in using a higher wattage charger than the rated one, but it could sometimes lead to unfortunate consequences.