USB Bandwidth

[UncleDave]

USB Bandwidth errors have started showing up now when I try and use too many USB devices along with the USB Modem. Tried using my webcam to test this further and seems I can't even use the webcam whilst the modem is plugged in!

Web on, no cam.
Cam on, no web.

Any way round this other than just buying another PCI USB2.0 card?
(There is some system reserved bandwidth, what is that for, if that can be removed it would (should) be ok..)

Dave.

[UncleDave]

5 atm.. Modem, Mouse, Steering Wheel + Shifter, Webcam.

If I unplug them all and leave just the mouse and modem, there still won't be enough for the cam.
The cam wants to take about 70% bandwidth!

Dave.

[UncleDave]

Makes sense I suppose..

[UncleDave]

roadsweeper said:

UncleDave said: The cam wants to take about 70% bandwidth! 70% of USB2.0 bandwidth is a hell of a lot surely?! Are you sure you're not running a USB1.1 motherboard or hub?

Nope! USB2
I've just ordered a new PCI USB 2.0 card from eBay so that should solve it. I could do with a few more ports anyway...

Dave.

[UncleDave]

My guess is the cam is bad... it's getting on a bit, could be that the cam is USB 1.0?

Anyway, ordered now so should have no problems!

Dave.

[UncleDave]

Yep, I would have thought the USBs on the Mobo wouldn't be the problem though... Quite a decent board, unlike my old one

As I say I was in need of a new PCI USB card anyway, this just gives me a better excuse to buy one - Might get a newer USB2 webcam from eBay too.. along with digital camera, the fact that it needs sellotape on it to function is getting annoying

Thanks for the advice/info.
Dave.

[UncleDave]

Everything fine now, bought a USB2 PCI Card from eBay.. chucked it in and Webcam is fine along with other devices in that card.

Only problem is I need more screws so the card is 'hanging loose' for a while. Back to eBay again for me!

[UncleDave]

mattley said:

UncleDave said: Only problem is I need more screws so the card is 'hanging loose' for a while. Back to eBay again for me! What standards case screws? Sod eBay for that, PM me your address, I'll post you a few.

DOH!
Too late

[UncleDave]

scorp said:

Cameras use something called isochronous transfer which means has top priority to the bandwidth of the bus to gaurantee low latency, 70% of 480mbps sounds somewhat high for a camera though, have you tried lowering its capture resolution?

It'll do me fine for now, as long as it's working OK on the new card, I am fine until I buy a new camera