USB 2.0 (Hi-Speed) is a USB specification that can transmit data at up to 480 Mbit/s.

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1answer
49 views

How am I exceeding USB 2.0 speeds on a USB 2.0 port?

I am writing files to a USB 2.0 drive from a RAM disk, that has a 256MB random filled file on it (created from /dev/urandom to stop the file being compressed too much). When I look at the speeds of ...
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0answers
21 views

Mac OS X USB port recognized as 1.1 instead of 2.0

I have a Mac OS X v 10.5.8 and I use the USB device Terratec Cinergy Hybrid T XS to watch TV on it. This has worked fine until recently, but now it seems that the USB ports of my Mac are recognized ...
0
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1answer
44 views

Will a 10 slot USB3 hub provide full bandwidth for 10 USB2 flash drives, and if not, where is the bottleneck?

I am wondering if a USB3 hub connected to a USB3 motherboard could sustain 10 USB2 flash drives being used simultaneously to transfer data at full bandwidth. Theoretically USB 2 speed is 60 MB/sec ...
0
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0answers
12 views

Dont know how to connect AC-97, HDAUDIO, and USB connectors to motherboard [duplicate]

I'll provide pictures so you guys can see, but basically I recently bought a new case for my pre built lenovo k330b. I cant find how I'm supposed to position the connectors. Please help me out with ...
2
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2answers
501 views

Force a single USB 3.0 port to work as USB 2.0

I have several Dell XPS 13 machines that exhibit intermittent failures of the left USB 3.0 port, as described in this thread. I have lost data to silent corruption/disconnections on several external ...
0
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0answers
16 views

USB protocol: why SSPLIT transactions not allowed in microframe Y6?

In USB 2.0, the scheduling clock time base divides each millisecond frame into eight "microframes" that are 125 microseconds long. They are labeled Y0 to Y7. When a host is talking to a full speed ...
0
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3answers
2k views

Windows 8: How to change from USB 3.0 to USB 2.0

Is there a way to disable USB 3.0 and enable legacy USB 2.0 support on Windows 8? I have an old microphone (Blue Snowflake) that only works when plugged into a USB 2.0 port. Is there any way to ...
0
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0answers
400 views

External USB drive not in File Explorer but shows in Disk Management

Freecom 500GB USB drive does not appear in File Explorer on Windows 8 when powering up (drive already plugged in). Disk however DOES appear in "Safely Remove Hardware". Immediately upon clicking ...
0
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0answers
101 views

What's the advantages of usb 3.0 compliant thumbdrive that doesn't have USB 3.0 speed performance?

I just learned that there are USB 3.0 compliant thumbdrives in the market that only support up to the maximum speed of USB 2.0 (nothing to do with using USB 3.0 device on USB 2.0 port here) and they ...
1
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2answers
57 views

What stats should I look out for when buying a fast USB drive? [closed]

What facts and figures should I look for speediest copying of single large ISO or multimedia files (700Mb to 4.5Gb)? Also, if a flash drive is the fastest USB-3 compatible device, can I assume it ...
0
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0answers
45 views

Windows 7 on vm with host Ubuntu shows “removable disk e:/” grayed out

When I go to the devices and printers inside control panel, and right click the USB 2.0 icon, and go to browse files. The "removable disk e:/" is grayed out. At the bottom, the VM does show the ...
1
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0answers
251 views

Can I Power the front-panel USB 2.0 ports with the power supply's 5V rail?

I have a high power (700ma+) USB device I wish to use on a single front-panel USB port. The USB specification in Wikipedia states: The USB 1.x and 2.0 specifications provide a 5 V supply on a single ...
2
votes
0answers
225 views

USB2 device incompatibility with USB3 computer

I have a new laptop with 2 USB2 ports and 2 USB3 ports. I have to use an USB2 RGB-D camera, namely the Softkinetic DS325. On my old laptop (only USB2 ports) everything is running as it should. On the ...
0
votes
1answer
576 views

Is it possible to use USB 3.0 Pendrive into my Laptop's USB 2.0 Port? [duplicate]

Currently I am having USB 2.0 port Laptop. I am in the plan to buy USB 3.0 Pendrive/External Hard Disk. Whether USB 3.0 pendrive/ext HDD will support USB 2.0 Laptop's port? Or it will have problem to ...
0
votes
2answers
64 views

Data speed on usb 1.0 vs 2.0

I have a CDMA USB dongle that I use for connecting to the internet. Now I plan to upgrade to a 3G dongle which has a USB 2.0 connection. Right now I have only USB 1.0 port on my computer. Will the ...
1
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2answers
306 views

windows 8 performance which is installed on USB SSD (boots from USB 2)

is any one here tried installing windows 8 to external USB SSD drive and booting drive from usb 2.0 port. i also want to install visual studio 2012 kind of ides and programming related softwares in ...
2
votes
2answers
704 views

Is there any advantage to using a USB 3 hub with USB 2 storage devices?

I have a host of USB 2.0 external HDDs that I'd like to plug into a single hub. Usually I don't actually access more than one at once, but you never know. Basically, I'm not sure how USB hubs work ...
7
votes
4answers
3k views

Would USB 3 make a difference for a USB 2 5400 RPM drive?

I've got a USB 2 5400 RPM external HD. I'm thinking of getting a new computer with USB 3 ports. If I'm currently getting read/write speeds from the external HD on USB 2 of roughly 30 mb/s (both read ...
1
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0answers
242 views

USB Wireless headset - Works in VMWare, not in host machine

Environment: Host - Win7 Pro SP1 64-bit VMWare Workstation 9.0.2 Guest - Win7 Pro SP1 64-bit I have two devices on USB 2.0 ports: a wireless headset from Logitech (H800) and a scanner ...
1
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2answers
328 views

USB 2.0 device in USB 3.0 Port

If I plug in an USB 2.0 device (e.g. mouse, keyboard) into a USB 3.0 port, will the controller still use polling to acquire input data (e.g. keypresses/movements) from the device?
0
votes
1answer
294 views

PNY 64GB Thumbdrive doesn't work in HP Envy h8-1414

I bought a 32 GB thumb drive (similar to the one below) and copied my wiki on to it using my Windows 8 laptop. I then plugged it into my HP Envy h8-1414 which has Windows 7 shoe horned onto it. ...
1
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0answers
236 views

USB 2.0 ports stop working, USB 3.0 port OK

I have a Windows 8 laptop (Acer V3-551-8489) that features 1 USB 3.0 port and 2 USB 2.0 ports. For some reason, the USB 2.0 ports stop working from time to time. Is there a way to restart those ...
2
votes
0answers
156 views

Installing USB Mouse on NF61S Micro AM2 SE?

I am using Windows XP sp3 and Windows 7 on NF61S Micro AM2 SE motherboard with AMD Athlon 64 X2 Dual Core 4400+, 2.31Ghz, 1.93RAM link for motherboard site; ...
4
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4answers
3k views

Is USB 3 backward compatiable?

If USB 3 is backwards compatible, why do they place USB 2 ports with USB 3 ports on motherboards? Also, do USB3 External drives not work with USB2 ports?
2
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1answer
220 views

Plug Computer Case USB 2 socket into mobo USB 3

I've got an Antec Fusion Remote Black Media PC case at home. The case needs two internal 9 pin USB headers to be fully functional - one for the USB ports on the front, and one for the LCD display. ...
1
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1answer
988 views

USB 3 stick in USB 2 port

If I plug a USB 3 stick (with 20/60MBps write/read speed) into a USB 2 port is it possible to get this speed (because USB 2 should be able to get 480Mbps = 60MBps)? I would assume that this speed ...
0
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2answers
257 views

Copying data between two external drives that support e-sata and USB 2.0. With one e-sata port, how achieve best speed file transfer?

Both read & write drives support e-sata and USB 2.0, but my PC only has one e-sata port. Does the choice between using e-sata for read or write drive make a difference in speed? This is on Windows ...
2
votes
2answers
17k views

USB 2.0-3.0, how do you tell the difference?

I know obviously speeds would be a key factor, but is there any spot on way to tell if a device is USB 2.0 or 3.0 such as a flash drive.
2
votes
1answer
554 views

How to enable USB 2.0 in Virtualbox 4.0.10, option for enabling EHCI is missing

I'm using Virtualbox 4.0.10 under Debian stable with Oracle VM VirtualBox Extension Pack 4.0.18r82821 to host an MS-Windows XP virtual machine for embedded software development. Unfortunately the VM ...
1
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2answers
3k views

Can I safely connect a USB 2.0/1.1 internal pin block to a USB3.0 motherboard header?

I've been working on my new PC build with the GA-Z77X-UD5H-WB WIFI motherboard. This board comes with a wifi/bluetooth card that goes into a PCIe x1 slot... but the card also wants to be connected to ...
3
votes
3answers
30k views

Extremely slow USB transfer speed

I am using Windows 7 32-bit, and have a Transcend 8 GB USB 2.0 flash drive. I have formatted the drive to NTFS using the Windows format tool. The problem is that when moving or copying files to and ...
1
vote
3answers
4k views

What downsides are there to running an OS off of a flash drive instead of a hard drive (USB 3.0 and 2.0) [duplicate]

Possible Duplicate: How does a hard drive compare to Flash memory working as a hard drive in terms of speed? I recently purchased a 16GB USB 3.0 flash drive, and I'm considering using it as ...
1
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4answers
17k views

USB 3.0 ports backwards compatibility problems with 2.0 devices?

I see some info on the net that suggest that I should be able to get my USB 2.0 devices to work in 3.0 ports. I only have two 2.0 ports on my new computer, and six 3.0 ports. I have installed ...
23
votes
5answers
49k views

Verifying USB connection speed (USB 3 or USB 2?)

I've purchased several new USB 3 capable drives to use with my new (USB 3 capable) laptop. They connect ok but I suspect they're silently falling back to USB 2. The sustained transfer rates I'm seeing ...
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votes
2answers
5k views

What is the difference between USB 2.0 and USB 3.0? [closed]

I want to buy a Pen Drive and a HDD. For both case I get two categories. USB2.0 and USB 3.0. I wish to ask my T.V. is compatible with USB 2.0 pen drive. I wish to buy USB 3.0 pen drive. But that is ...
0
votes
1answer
527 views

low usb speed file transfer using KVM host CentOs

i'm using qemu-kvm(1.1.1) to run a Windows 2008 R2 Virtual Machine. The host machine is running CentOs 6.3. I'm exporting a USB 2.0 Hdd device to the VM using USB-redirection with spice channel. So ...
1
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4answers
5k views

Extend USB 3.0 cable

I have a couple of new USB 3.0 devices which connect to my USB 3.0 ports via the new "Blue" USB 3.0 cables that end in what looks like a USB 2.0 Type A connector. Indeed, the USB 3.0 devices will ...
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2answers
339 views

multiple USB 2.0 devices faster on USB 3.0? [duplicate]

Possible Duplicate: Using USB 3.0 to speed up transfer between USB 2.0 devices? I know USB 2.0 maxes out at 480Mbps, and USB 3.0 maxes out at 4800Mbps. Can multiple USB 2.0 devices tap ...
5
votes
1answer
11k views

Does a USB hub affect performance?

I have two devices I want maximum throughput and latency with. (Midi drums and midi keyboard for example) Would connecting both to the same USB port via a hub effectively limit the maximum data ...
1
vote
3answers
1k views

MIDI Over USB-Hub: Latency?

I am connecting an NI Maschine (hardware) over USB to my Macbook Pro. Right now I'm using a USB 2.0 powered hub (by DLink or Belkin, depending). It seems fine, but these things can be hard to detect. ...
2
votes
1answer
12k views

How to find which USB port is 2.0 or 1.1

This USB device could perform faster. The above message comes many time I connect my USB device to any port. I've more than one USB port, but don't know which ones are 2.0 and which ones are 1.1. Is ...
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1answer
335 views

Why do I only get half of the throughput when copying from my USB 2.0 drive?

When using the command: `tar cvf - ./Lacie/ > ~/Lacie.tar` According to Activity Monitor this gives me: Data written/sec: 32.1 MB/s Data written/sec: 31.5 MB/s (peak 47.9 MB/s) CPU usage: 5.7% ...
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1answer
257 views

Is a 2-Port USB 2.0 Hub faster than a 7-Port USB 2.0 Hub

I have a computer with about 6 external hard drives connected, however it's died and i'm replacing it with another computer with only 4 USB 2.0 ports. I have a 7 Port USB 2.0 Hub that is connected to ...
1
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1answer
2k views

USB 2.0 not working

Whenever I plugin a USB memory device in one of my USB ports Windows 7 (32-bit) tells me this device can run faster. I tried several devices and all ports. I found that the device manager doesn't ...
5
votes
1answer
428 views

Can a case with front USB ports be connected and used as a USB 3.0 port

I found this when I typed in my question. It sort of answers my question but I want to double check. Will cases with front USB port support USB 3.0? I have a Rosewill Challenger case purchased in ...
0
votes
2answers
2k views

Bad VM performance on external hard disk

I am running 4 virtual machines on my external hard disk (USB 2.0, 5400 rpm, Western Digital). Yesterday I wondered with they are running to slow but i am not sure from which fact makes it slow: USB ...
3
votes
2answers
812 views

USB Ethernet adapter with VLAN support available? [closed]

I'm looking for a USB Ethernet adapter with VLAN support. It has to work on Windows 7 Enterprise, and allow me to select which VLAN to connect to. Apparently I'm not able to find one on Amazon or ...
5
votes
3answers
5k views

Does the device that supports USB 3.0 work via computer that supports USB 2.0

I am planning to buy external hard drive that supports USB 3.0. Will it work with my old notebook that has USB 2.0?
10
votes
1answer
522 views

Device is no longer USB 2.0?

I have a 32 GB pen drive that I have turned into my PC repair kit. I have formatted it to be a boot-able drive with multiple .iso's for different options. Recently however whenever I plug in the ...
7
votes
2answers
3k views

How to know which USB port is 2.0?

My computer (running Windows XP) has 4 USB ports at the back. From the Device Manager window, I know that one of them is 2.0, and the rest are all 1.0. I have a webcam that I think will benefit from ...