Question about PC charging

[gothicnerd1033]

Okay, Heres an interesting question.

Since USB 3.0 is becoming popular rapidly, And most likely 50% of us nowadays have USB 3.0 ports now.. If you plug your USB 2.0 HTC Evo 3D/V into a 3.0 port, Will it charge at USB 2.0 rates(500ma)? Or does it charge at the full 3.0 rate(900mah)? Does fastcharge enabled/disabled effect this in any way?

What about any USB device that is 2.0 in a 3.0 port? Is it allowed to pull the 900mah.. Or does it stick with the 2.0 500mah? Say your using a USB 2.0 4 port self powered hub(Not the kind with a power supply you plug into an AC outlet), plugged into a USB 3.0 port on your motherboard.. Does this mean the USB 2.0 hub can supply 900mah to its 4 ports.. or only 500mah?

Just figured Id ask, Since google doesnt return much.

 

[Deleted User]

Well my pc when plugged in with usb 3.0 won't even charge ,but I would imagine if it recognized then yes you would be able to change the power amounts probably through power options or device manager. Idk about that too much ,but here is a nice website explaining the differences USB 2.0 vs USB 3.0, Difference between USB 3.0 & USB 2.0 Flash Drives | Premium USB Blog

 

[Palmetto Fellow]

Without fast charge enabled in the kernel, I doubt it would pull 900mA. Since the phone doesn't have USB3.0 ports, it can't "recognize" a USB 3.0 port, or even know that 900mA is an option.

Generally speaking, the end-device regulates power consumption, not the source. I can connect a 5amp device to a 10amp fuse...the 5amp device isn't going to draw 10 amps.

 

[gothicnerd1033]

I guess that makes sense. I just wasnt sure if it would work without fastcharge enabled, Or if it would work at all.

I was looking into USB 3.0 hubs and 3.0 external HDD cases on Amazon, And got a message on my phone.. which made me wonder about all of this. Lol.

 

[Watagump]

My motherboard has a feature called Super Charger, I installed it cause its suppose to make charging things really fast. I never timed it to see if it works, it did cause lockups coming out of sleep once in a while. Needless to say, the program was removed.