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Topic: Strange Higher CPU usage using USB 3.0 interface vs. USB 2.0 (Read 1108 times) previous topic - next topic
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Strange Higher CPU usage using USB 3.0 interface vs. USB 2.0

Hello,
I am sorry to disturb you for a problem absolutely (I believe) not depending by Foobar v2, but I am having a strange issue I cannot understand.

Let me try to explain the issue I detected using the new FB v2 (but, again, I don't think it is a replement related to FB):
1) I have my audio library on 4 external USB 3.0 HDDs
2) these 4 HDDs are connected to a 7-ports USB 3.0 (high speed) hub
3) my PC is a 32bit Dell D830 having USB 2.0 native ports and USB 3.0 ports provided by a CSL ExpressCard 2-ports USB3.0 5Gps interface

The problem/strange issue:
If I connect my 7-ports USB 3.0 HUB to the expected USB 3.0 port of the ExpressCard, FB v2 uses about 70% of CPU resources to play a regular 44k 16bit FLAC stereo audio fiele .
If I connect the USB 3.0 HUB to one of the USB 2.0 native port of the laptop, then FB v2 can play exactly the same audio file using only 35% (half than before) of CPU resources.

Anyone out there can help understanding what's happening?

Kind regards, Andrea
 

Re: Strange Higher CPU usage using USB 3.0 interface vs. USB 2.0

Reply #2 –
Quote from: grimes on
Update driver USB-Root-Hub (USB 3.0) in device manager.

Hi @grimes , thanks but, unluckily, no update available. The installed driver looks to be current. It is the Windows 10 own driver.