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USB 3.0 SS slow transfer speeds.

Last response: in Storage
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April 9, 2012 1:23:00 AM

I have a dell xps L702x with USB 3.0 ports, and the highest transfer rate I get is 5MB per second.... which is so slow its mind blowing. It also has 2 USB 2.0 ports which get the same speeds.

I have updated to the newest BIOS (A17), and USB 3.0 drivers (USB3_Renesas_W7_A03_Setup-61X2W_ZPE)... No change at all. Still getting 5 MB per second transfers which is nearly impossible to work with.


I tried write-caching on and off using this guide. (http://www.sevenforums.com/tutorials/10392-write-cachin...) both had zero effect on the trasnfer rates still a solid 5MB per-second with either setting. Also Tried changing my driver to the R317222.exe From dell which some people said they had luck with no change with that either... I am baffled

My specs are :
Intel I7 2.2-3.0 GHZ processor
2x 120 GB SSD Force 3 Drives
2x 4 GB DDR 3 @ 1333 MHZ
GT 555m 3 GB video card

I am running the SSD's under AHCI with TRIM enabled. And the devices ive used in the 3.0 ports are usb 2.0 flash drives which should get speeds much faster than 5mb/s something is going on here i just dont know what.

PLEASE HELP!!! and Thanks for reading!
a c 523 G Storage
April 9, 2012 1:45:00 AM

What are you plugging into the USB 3.0 port that is giving you 5MB/s speeds?
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April 9, 2012 1:54:24 AM

I've tried a USB 2.0 pen drive and a USB 2.0 external hard drive both get 5MB/s
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a c 523 G Storage
April 9, 2012 1:57:32 AM

Your pen drive or external hard drive has to be USB 3.0 in order to get USB 3.0 speeds.
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April 9, 2012 3:12:40 AM

Dereck47 said:
Your pen drive or external hard drive has to be USB 3.0 in order to get USB 3.0 speeds.


This is true, but a USB 3.0 port should still operate at USB 2.0 speeds when connected to a USB 2.0 device.


I'm having a similar problem, except mine won't transfer faster than 0.76 MB/s on any usb ports, including usb 3.0 and usb 2.0.
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a c 523 G Storage
April 9, 2012 3:20:45 AM

rsnider said:
This is true, but a USB 3.0 port should still operate at USB 2.0 speeds when connected to a USB 2.0 device.


Good point, that slipped my mind. You're right the transfer speeds should still be faster than 5MB/s.
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April 9, 2012 3:29:53 AM

Yeah the fastest speed i get is 5mb/s it drops over time to about 3.65 after about 30-40 seconds of transfering. but i should get at least near 20-50 mb/s but don't . its very annoying. thanks for responding tho guys.
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