Windows 7: Only my external hard drive hits USB2.0 speeds

I would also check to see you connected the power supply correctly ( double check ) and all the connections - I guess you already have done that. There is a setting in power options for usb - it might need disabling -selective suspend.

I've got that Intel RST running and it's still slow. It's forever slow to even cancel.. I wonder if it has something to do with Windows mucking up the file transfer process.

I'll look at the BIOS again for the USB settings and mess around with it.

I do have the computer in AHCI now.

Those speeds of your flash drive are not normal. But it does not hurt to test the capabilities. Use HD Tune, but let it run to the end - else you do not get the Access Time. Have a look at my two Kingston data traveller and compare the huge difference in access time.

I have other USB2.0 devices that are equally as slow. It's not just that particular Kingston giving me problems.

So I went and looked at the USB BIOS.
USB Functions: Enabled
2.0 Controller: Enabled
Controller mode: HiSpeed (480mbps)
EHCI hand-off: Enabled
Legacy USB support: Auto

When rebooting out of the BIOS, I got the black screen telling me to insert a boot device. I had to revert back to Enhanced IDE to get Windows to start.

The HDTune results are interesting


Here's what I get immediately after that, transferring a 2.99GB movie file from my hard drive to my USB drive


Same file on the same USB port, going to my external hard drive:


Interestingly, the file transfer to the external hard drive started up over 100mbps and toward the end was just under 30mbps

This is probably a fragmentation effect on the disk. By the way, the numbers are in mBps, not mbps. The big difference between the stick and the disk is, however, mysterious - especially as the HD Tune numbers of your stick are quite good.

I don't know the difference between mBs and mbs, sorry. I'll claim ignorance.

So.. any thoughts on why Windows transfers files so slowly to it when it seems like everything else is just fine? I'm running defrag now. I'm wondering if I should have started with a clean installation of the OS instead of imaging my old hard drive onto my new one, especially since the old HDD was failing

Either way, thanks a lot for all of the help.

I am thinking. The problem is intriguing. When I come up with something (which is not sure), I'll let you know.

Mb = Megabits
MB = Megabytes (which is 9 times more) - 1 Byte = 8 data bits plus 1 checkbit

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