USB 3.0 Expasion Card issue

Zeebedy · 20 Oct 2023 at 16:33

Hey guys,

the other day I purchased a 4 port (non-powered) one from the internet..I had plugged in my keybaord and the keyboard pass through USB. It was working great, until I booted up with a new mouse which I added for a total of 3 USB ports..

I cue would not stay open, and crash out the app when manually trying to setup..

So I removed the KB and pass though to my motherboard spare usb ports, and left the mouse on the card..

Is it possible (now that its all working well) there is too much throughput on the card?

Werewolf · 20 Oct 2023 at 21:37

Do you mean a keyboard/mouse switch when you say keyboard passthrough?

I can't see there being too much throughput from just a keyboard and mouse, especially if they're usb2 connecting via a usb3 card
What's the "pass through" doing? is it active or just something passive?

Tetras · 20 Oct 2023 at 21:49

Are you talking about an external hub that is powered through a USB port, or an internal hub that is using a PCI-E slot?

Zeebedy · 20 Oct 2023 at 22:05

Werewolf said:
Do you mean a keyboard/mouse switch when you say keyboard passthrough?

I can't see there being too much throughput from just a keyboard and mouse, especially if they're usb2 connecting via a usb3 card
What's the "pass through" doing? is it active or just something passive?

No I hooked the pass through up even with no intention of using it. It’s just there in active.

Tetras said:
Are you talking about an external hub that is powered through a USB port, or an internal hub that is using a PCI-E slot?

Internal hub mate. Running on a “one slot” lane on the motherboard

Tetras · 20 Oct 2023 at 22:12

Zeebedy said:
Internal hub mate. Running on a “one slot” lane on the motherboard

Does it have any cables other than just the slot? Sometimes these cards get additional power.

Zeebedy · 20 Oct 2023 at 22:31

Tetras said:
Does it have any cables other than just the slot? Sometimes these cards get additional power.

No, it’s one without extra power input. I chose it specifically for that. I think it might be the issue??

Tetras · 20 Oct 2023 at 22:38

Zeebedy said:
No, it’s one without extra power input. I chose it specifically for that. I think it might be the issue??

What kind of mouse and keyboard do you use? Are they boring, or with lots of flashy lights 'n stuff?

Zeebedy · 20 Oct 2023 at 23:00

Tetras said:
What kind of mouse and keyboard do you use? Are they boring, or with lots of flashy lights 'n stuff?

I use a Corsair K100 keyboard and currently have a Logitech G502 mouse hooked up to my pc mate.

Tetras · 20 Oct 2023 at 23:08

Zeebedy said:
I use a Corsair K100 keyboard and currently have a Logitech G502 mouse hooked up to my pc mate.

Hmm.

"A single USB 2.0 port can be found at the rear of the K100 RGB. Meanwhile, not just one, but two USB connectors can be found at the tail end of the keyboard's connector cable. As it turns out, the keyboard's power requirements technically exceed the capacity of a USB 2.0 port, so if the keyboard isn't hooked up to a more powerful USB 3.0 (or later) port, Corsair needs to pull power from a second port.

That said, the second connector also serves another purpose: driving the USB host port on the keyboard itself. Corsair has opted to implement a full pass-through solution (rather than using an internal USB hub), so the second USB connector needs to be inserted (regardless of power needs) in order to supply a connection to the host port. The final product is a bit trickier than it otherwise needs to be, but such is the case when ensuring the keyboard will be fully backwards-compatible with USB 2.0 hosts."

The Corsair Gaming K100 RGB Keyboard Review: Optical-Mechanical Masterpiece

www.anandtech.com

I wouldn't expect a keyboard and a mouse to exceed the hub's capacity, but:

"All PCI express cards may consume up to 3 A at +3.3 V (9.9 W). The amount of +12 V and total power they may consume depends on the form factor and the role of the card:[26]: 35–36 [27][28] x1 cards are limited to 0.5 A at +12 V (6 W) and 10 W combined."

PCI Express - Wikipedia

en.wikipedia.org

Zeebedy · 20 Oct 2023 at 23:25

Thanks for the info mate. Appreciated.