![]() ![]() Unless you buy one of those cheap motherboards made by a manufacturer that has like 4 ports all feeding off the same controller like a cheap skate which TBH I have never seen a controller with a mixed port setup though that doesn't mean that they don't exist. Some of the things stated on here are so wishy washy and guess like, don't you think that a USB 3.0 controller is for USB 3.0 and they simply have a separate controller for USB 2.0, I know my machine has a separate controller chips for both variants I can see it under the hardware listing. So there is no reason from the architecture to expect that a USB 2 device plugged into a USB 3 hub (or port) will work any faster than if it's plugged into a "native" USB 2 port.Īs others have suggested, it may be the case that a new USB controller that supports USB 3 as wwell as 2/1.1/1 might be faster at doing USB 2 than an older It is also not the case that having USB 3 capabilities implemented in the same controller - even if in the same chip - as the USB 2 controller will make the USB 2 controller work any faster. ![]() ![]() The USB 2 bus has all the bandwidth available that it usually does, without taking anything from the USB 3 side. The controller provides both a USB 3 bus and a USB 2 bus. It is not the case that the hub or whatever takes some of the USB 3 bandwidth and gives it to a USB 2 device if one happens to show up. Which does the same things that any other USB 2 controller would, and has the same 480 Mbit/s speed limit. When you plug a USB 2 device into a USB 3 port, the USB 2 device uses the same pins that it always does, and those pins connect to wires that take the connection all the way back to the USB 2 controller int he host. The host controller actually has logic for both USB 2 and USB 3 in it, and enumerates on the host system as two controllers: One USB 2/1.1/1, and one USB 3. The USB 3 port has all of the pins for a USB 2 port in it. Reality is that when you plug a USB 2 device into a "USB 3 port", you aren't really plugging into a USB 3 port! Not electrically, anyway. There is a fundamental misunderstanding beneath this question, and many similar questions. Is there any studies to determine if USB 3.0 unpowered is faster than 2.0 powered? Using the 3.0 ports instead of 2.0 seems to even out any sort of lag due to bottlenecks dealing with 2.0 technology and gives the devices the best chance of working properly. I am not promoting this as a fix all for every device. I since attached a POWERED 3.0 hub which I connected the Diamond BVU165 (USB 2.0) through the USB 3.0 hub and never had a problem since. During this crash, the monitors would disconnect (turn black and go to sleep) and reconnect to the PC. Whenever I would watch movies or youtube videos on the PC, after 2-3 mins, the hub would crash and I could hear my scanner (also connected to the hub) reboot and go through the warm up procedure (USB powered only). I verified this later on because I have 2 additional monitors connected to my PC via a Diamond (BVU165) through a USB 2.0 powered hub. Sure enough, I plugged the unilink into the 3.0 port instead of the 2.0 port and never had a problem since. On a hunch I believed that the USB 2.0 port itself was the bottleneck. I tried everything including contacting support, downloading the SetPoint app, switching ports (USB 2.0), etc. I had the unilink receiver plugged in to the 2.0 port and the keyboard would constantly lag to the point that I was going to return the solar keyboard to the store. So short answer yes, a small increase, but not nearly as fast as native USB 3.0 links. When I plugin a USB 3.0 thumb drive on the same ExpressCard USB 3.0 hub though, I get up to 122 MB/s. I think the controller is probably more efficient on USB 3.0. So I am getting both a higher minimum speed and ceiling when the same USB 2.0 device is on the USB 3.0 hub. If the enclosure is a USB 2.0 device, it will be operate with more of its bandwidth when plugged into a USB 3.0 hub, but not nearly as much as if it was a USB 3.0 to USB 3.0 device to hub link (with a USB 3.0 cable).Īt least on my laptop, USB 2.0 external 500 GB on USB 2.0 gives me about 19–23 MB/s and up to 25–32 MB/s when connected to a USB 3.0 express card. for instance a modern 7200 hard drive in a external enclosure could more than saturate the USB 2.0 port. You will only see gain if the device in question can dish out a higher bandwidth over another interface like ExpressCard or PCIe. Actually, yes, it will be faster by a small margin.
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