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Slow USB 3.0. Why ?

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April 29, 2012 8:12:47 PM

I have built a new intel based PC. I5-2500K, Intel DBZ68bc MOBO. I copy file over 1gb all the time. The best transfer rate I can get is about 6mb/s. I thought this 3.0 USB was suppose to transfer in the gb's per second.

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a b G Storage
April 29, 2012 8:18:46 PM

Alan8609 said:
I have built a new intel based PC. I5-2500K, Intel DBZ68bc MOBO. I copy file over 1gb all the time. The best transfer rate I can get is about 6mb/s. I thought this 3.0 USB was suppose to transfer in the gb's per second.


what drives are you transferring from. like for instance i have an external hard drive enclosure that is usb3 and i have two 3.5 inch hard drives that I copy to and from and the max rate i normally get is about 100 mb/s because that is the max read/write speed of the hard drives.

yes usb 3 can transfer faster the 6 mb/s but your limited by the drive speeds.
April 29, 2012 8:25:27 PM

Still pretty slow though. My USB 3.0 portable hard drive transfers from my PC at about 45-50mb/s.

The theoretical speed of USB 3.0 doesn't matter when it exceeds the speed of a 7200rpm Hard drive. Still, I get 10-15mb/s from my USB 2.0 hard drive, so something is wrong.
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a c 311 G Storage
April 29, 2012 8:30:52 PM

Alan8609 said:
I have built a new intel based PC. I5-2500K, Intel DBZ68bc MOBO. I copy file over 1gb all the time. The best transfer rate I can get is about 6mb/s. I thought this 3.0 USB was suppose to transfer in the gb's per second.

Did you install the motherboard chipset driver and usb 3 driver? You should get more like 60-80MBps average rates for a usb 3 transfer.
April 29, 2012 8:45:06 PM

hardeho said:
Still pretty slow though. My USB 3.0 portable hard drive transfers from my PC at about 45-50mb/s.

The theoretical speed of USB 3.0 doesn't matter when it exceeds the speed of a 7200rpm Hard drive. Still, I get 10-15mb/s from my USB 2.0 hard drive, so something is wrong.


I am transferring from a barraca 1tb 7200rpm, (I am also using OCZ buffering) to a USB 3.0 jump drive.
April 29, 2012 8:47:27 PM

RealBeast said:
Did you install the motherboard chipset driver and usb 3 driver? You should get more like 60-80MBps average rates for a usb 3 transfer.



I have the 3.0 host controller in my program list. What am I looking for with the chipset ?
a b å Intel
a c 311 G Storage
April 29, 2012 8:48:07 PM

That is way too slow, are you using the usb 3 ports on the back panel of the motherboard? My USB 2 drives do faster transfers than your USB 3.
April 29, 2012 9:06:55 PM

No, I am using the front USB (blue) ports. I plugged their blue cable into the 3.0 USB header located on the MOBO.
a b G Storage
April 29, 2012 9:20:54 PM

Alan8609 said:
I am transferring from a barraca 1tb 7200rpm, (I am also using OCZ buffering) to a USB 3.0 jump drive.


this is not surprising. is it a cheap flash drive? what is the drives rated speed?

RealBeast said:
That is way too slow, are you using the usb 3 ports on the back panel of the motherboard? My USB 2 drives do faster transfers than your USB 3.



could be a cheap flash drive.
April 29, 2012 10:17:04 PM

Yes, it is a cheap flash drive. Even my good 2.0 usb drives transfer at about the same rate.
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