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Questions tagged [usb-3]

USB 3.0 (SuperSpeed) is a USB specification that can transmit data at up to 5 Gbit/s.

90 votes
6 answers
327k 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 ...
Molomby's user avatar
  • 1,885
79 votes
3 answers
18k views

Does a USB 3.0 connection require a USB 3.0 cord?

Does a USB 3.0 connection require a USB 3.0 cord to reach USB 3.0 speeds (SuperSpeed)? Will any USB cord support any USB 3.0 device?
Xavierjazz's user avatar
  • 8,188
67 votes
4 answers
502k views

Speed comparison between USB 2.0, USB 3.0, eSATA, Firewire and Thunderbolt

Which external connection has the highest data throughput with respect to the headers used? I would appreciate a slowest to fastest list including USB 2.0, USB 3.0, FireWire 400, FireWire 800, eSATA ...
Moshe's user avatar
  • 5,828
52 votes
5 answers
22k views

Using USB 3.0 to speed up transfer between USB 2.0 devices?

I've noticed that transfers between USB 2.0 drives are usually very slow. From what I understand, this is because all USB 2.0 devices connected to the same USB 2.0-host share the same 480Mb/s of ...
Martin's user avatar
  • 775
50 votes
9 answers
420k views

How to find out which USB port is USB 3.0?

In my laptop (a Lenovo y470 ) there are three USB ports. One of those is USB 3.0 others are USB 2.0 . I do not know which one is what. When I copy data from my External HDD it transfers at 38MB/s from ...
Rakesh Juyal's user avatar
  • 2,051
49 votes
4 answers
94k views

What USB 3.0 functionality does Intel's iusb3mon monitor?

Along with Intel USB 3.0 Host Controller drivers, a utility called "iusb3mon.exe" (Intel USB 3.0 Monitor) was installed at startup. Its apparent goal is to "monitor" some USB 3.0 functions. My ...
Ilya's user avatar
  • 1,814
47 votes
8 answers
36k views

Installing Windows 7 x64 on a computer with only USB 3 ports

I am installing Windows 7 x64 on a HP EliteDesk 800 G3 SFF that only has USB 3 and USB Type-C ports. Initially, upon booting the USB install media, the USB keyboard and mouse wouldn't work - this ...
qroberts's user avatar
  • 5,249
44 votes
5 answers
31k views

What would happen when USB devices draw more power than the hub can provide?

I am going to buy a 7-port USB 3.0 hub, and connect 7 portable HDDs to it, in order to build a RAID 6 array. The hub comes with an upstream micro-USB 3.0 type B port, along with an auxiliary power ...
Livy's user avatar
  • 1,176
41 votes
2 answers
48k views

Does a USB 2.0 device connected to a USB 3.0 hub slow down the hub to 2.0 speeds?

At work, I want to plug all my USB devices into a single USB hub so I only need to plug one USB cable, external display, and the power cable into my laptop. I have some USB 3.0 devices and some ...
rob's user avatar
  • 14.3k
37 votes
8 answers
70k views

How do I connect two computers using USB 3.0?

I know this question exists, but it's about USB in General. Mine is about USB 3.0 and newer specifically. USB 3.0 specification introduces the feature known as direct host-to-host connection with ...
Gizmo's user avatar
  • 1,969
33 votes
4 answers
48k views

How can I be sure that I've plugged a device into a USB 3 port?

I have a number of USB ports on my computer, some USB 2 and some USB 3. I want to plug a device into a USB 3 port. Unfortunately, they're all black so I can't use the usual "USB 3.0 ports are blue" ...
Thomas Johnson's user avatar
29 votes
15 answers
160k views

Why does Windows 7 ask for additional drivers when installing from a USB 3.0 drive?

I just bought a new config ( ASUS p8z68-v lx, i5-2500k + ram and new graphic card ). Coming back and installing it in my old computer, I just saw that my DVD player was on IDE (yup…). So, I needed to ...
Shikiryu's user avatar
  • 305
27 votes
4 answers
55k views

Are USB 3.0 ports yellow?

My laptop has a yellow USB port. Is it USB 3.0?
ripper234's user avatar
  • 11.6k
25 votes
3 answers
14k views

Is it safe to use a micro-USB 2 cable in a USB 3 portable hard drive?

The micro-B USB 3 port seems to be somewhat backwards compatible with the old micro-USB 2 standard. I was able to charge a phone that had the micro-B USB 3 port with a micro-USB 2 cable. However, I ...
juil's user avatar
  • 489
25 votes
2 answers
36k views

5400rpm HDD speeds in a USB 3.0 connectivity enclosure

I plan to replace my laptop's 5400rpm HDD with an SSD in the near future. I then want to make the old HDD an external HDD. I want to get it to work with USB 3.0. Will I get better speeds from my ...
user avatar
25 votes
4 answers
264k views

What does the BIOS setting 'XHCI Pre-Boot Mode' do?

I have a BIOS setting called XHCI Pre-Boot Mode. If I have this enabled, USB devices which aren't plugged in at boot, are never recognised. If I set it to Disabled then USB devices work normally. The ...
Jamie Kitson's user avatar
24 votes
4 answers
57k views

Will a mobile phone charge faster if plugged into a USB 3.0 port

Will a phone(or any device for that matter) charge faster if it is plugged into a USB 3.0 port compared to a USB 2.0 port? I know to assist charging you can turn features off(with flight mode) or ...
WillNZ's user avatar
  • 677
23 votes
2 answers
43k views

Are there issues with stacking USB hubs?

Would attaching a 4 port USB-3 hub to a port on a USB-C to USB-3 hub cause problems?
Metaphor's user avatar
  • 422
23 votes
7 answers
194k views

How many MB/sec can I expect copying to USB 3.0 enclosure with SATA drive?

I have a new laptop with USB 3.0 ports, and a new SATA 5200 rpm hard drive I just put into a new USB 3.0 enclosure. I am copying my backups from the local hard drive to the new USB 3.0 hard drive/...
CChriss's user avatar
  • 1,333
21 votes
2 answers
4k views

Is a USB 3.0 device possible with a four contact USB 2.0 connector?

I have a cheap USB flash drive here which is marketed as USB 3.0, has the typical USB 3.0 blue plastic, but only comes with the classic USB 2.0 four contacts on the inside and has speeds in the USB 2....
Grumbel's user avatar
  • 3,662
18 votes
3 answers
99k views

How seriously does cable length affect USB 3.0 transfer speeds?

Recently I've been thinking of upgrading my computer with some USB 3.0 ports. However, the problem is my computer is some ways away from my desk so that would mean I would need a long cable, ...
Faken's user avatar
  • 1,451
18 votes
1 answer
4k views

Why is there a speed increase when using a USB 2.0 device with a USB 3.0 port?

I know this question, or similar questions, have been asked before, but still I am curious… My laptop has two USB 3.0 ports and—on occasion—I will plug in a Western Digital external hard drive which ...
Ben Franchuk's user avatar
  • 1,759
17 votes
2 answers
133k views

Is USB 3.0 backwards compatible? [duplicate]

Possible Duplicate: Can a USB 3.0 pen drive be used on a USB 2.0 port? I am really excited about USB 3, especially since it has made its way into the new MacBook Airs and Pros. Since it is much ...
daviesgeek's user avatar
  • 1,669
16 votes
3 answers
59k views

How to determine whether I have USB3 ports in my laptop?

Is there any way, besides reading the product manual, to determine which type/class of USB ports are present in my computer casing? Can this obtained by visual confirmation, reading the device ...
NGLN's user avatar
  • 980
15 votes
2 answers
221k views

Should I enabled or disable xHCI hand-off in BIOS setup, when running Windows 7?

I have a Jetway NF9E-Q77 motherboard which supports USB 3.0. An Intel driver is available to enabled USB 3.0 support in Windows 7. Assuming the driver is installed, should xHCI hand-off be enabled or ...
misha256's user avatar
  • 11.4k
14 votes
2 answers
5k views

Is a USB 3 Type A-to-A cable dangerous with USB 2 ports?

I recently purchased a USB 3.0 hub, and was surprised when I opened the box to find that it used an A-to-A cable for it’s main connection; see picture below. A “Type A” connector is the rectangular ...
jpfx1342's user avatar
  • 549
14 votes
5 answers
5k views

Windows 10: Display a warning if I plug a USB 3.0 device into a USB 2.0 port

Back in the days of Windows XP, when I plugged a USB 2.0 device into an non-USB 2.0 port I used to get a warning like: This device can perform faster This USB device can perform faster if you connect ...
jdm's user avatar
  • 2,085
13 votes
6 answers
392k views

External monitors not detected through docking station after Windows 10 update

I have a Dell Inspiron 7520 and a Dell D3000 docking station connected through the USB 3.0 port. Before updating to Windows 10 (I was using Windows 7), everything worked fine. Two monitors were ...
Mark Girard's user avatar
12 votes
2 answers
30k views

Is there a way to upgrade laptop's USB2.0 to USB 3.0?

Is there a way to upgrade laptop's USB 2.0 ports to USB 3.0? If so, will the changes be a driver update alone or will it require changes in the internal hardware?
Avatar's user avatar
  • 243
12 votes
1 answer
32k views

will any usb extension cord work with usb3? [duplicate]

I know that with 1gbit ethernet 100mbit ethernet cables won't work. You have to use cables designed for 1gbit. What about with USB3? If I have a ten year old USB extension cable (ie. one that was ...
neubert's user avatar
  • 7,212

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