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Questions about USB 2.0 vs. the original

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Questions about USB 2.0 vs. the original

Old 02-09-03, 03:40 PM
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Questions about USB 2.0 vs. the original

I've got a couple of questions:

1) What exactly differentiates USB 2.0 from USB 1? Is it in the actual plug, the cable, or somewhere on the card/motherboard? The reason I ask is that my brother just bought a case and a motherboard. The motherboard has 4 USB 2.0 built in, and has the capability for 6, max. The case has 2 USB ports in the front, but I don't know if they're 2.0 or not. Would they be able to be 2.0 just by connecting the the 2.0 capable motherboard?

2) Would USB 1 devices benefit at all from being plugged into a 2.0 port?
Old 02-09-03, 03:45 PM
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1) USB 2.0 is 480 Mbps, USB 1.1 is 12 Mbps. I believe the cables are the same. Connecting any USB connector to USB 2.0 pins on a motherboard will result in USB 2.0 at the connector.

2) I don't think it would help at all.
Old 02-09-03, 04:07 PM
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A USB1.1 will only run at the 1.1 speed. USB 1.1 can't run any faster than the 12 mbps, reguardless of the port. On the other hand, the USB 2.0 can only run 480 Mbps on a 2.0 port. If you put the 2.0 in a 1.1 port, it will only achieve 1.1 speeds.

(For example, the 32x ext. burners can only burn at 4x in a 1.1 port and need the 2.0 to acheive 32x speeds)

The usb cables are the exact same 1.1 or 2.0, the only difference is the packaging.
Old 02-09-03, 06:03 PM
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I've seen some of theh 2.0 cables include a choke near the ends to help with noise. Other than that they are the same.
Old 02-10-03, 12:09 PM
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Thanks for the responses, everyone, but one question still remains unanswered:

My brother's motherboard has 4 USB 2.0 ports built in, and came with (I'm not sure what exactly it's called) an expansion thing that fits in the PCI area of the case and plugs into the motherboard, giving the option for two additional USB 2.0 ports in the back. In the front of the case, there's kind of the same thing, with 2 USB (version unknown) ports built into the case that can be plugged into the motherboard. So what determines the USB version of the ports in the front of the case: will it depend on the plugs, or will they all be 2.0, so long as he plugs them into the motherboard capable of 2.0? Obviously it would be nice to have some USB plugs in the front, and even nicer if they'd also be 2.0.

Right now, it doesn't really matter since he only has a few USB 1.1 devices and no USB 2.0 devices, but I'm just curious.
Old 02-10-03, 12:13 PM
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If the pins on the motherboard that the USB ports in the front of the case are plugged in to are USB 2.0, the ports in the front of the case will be USB 2.0. The plugs don't matter. If the pins are USB 1.1, the ports in the front of the case will be USB 1.1.

Whatever the expansion card is doesn't matter unless the ports in the front of the case are connected (plugged in to) it.
Old 02-10-03, 02:15 PM
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Thanks, X. Your first paragraph answered my question (I think).
Old 02-10-03, 02:18 PM
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You better re-read it. I just looked at it and saw how much I messed it up!
Old 02-10-03, 02:21 PM
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That's what I thought you meant. Hence the "(I think)".

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