Card Reader slower after Win 7 Install

Custom / P5k-e
December 30, 2010 at 12:24:52
Specs: Windows 7, 2.838 GHz / 4095 MB
I have a similar problem that you described on my Intel quad 9550 system with 4 gig of memory. I was running XP Pro and did a clean install of 64 bit Windows 7 and the read rate from my SD cards, read on my Rosewill Card reader, dropped Significantly. When I have large files (like HD movie files) I don't even try to use my Windows 7 machine for downloads. I just go to my 2nd computer running XP Pro with the exact same card reader installed to download the files. The drivers for my card reader connected to the internal USB port header on my ASUS motherboard are the generic ones and if I remove them the same ones get installed on startup. I am frustrated with trying to find a solution and have no idea where to look. I know the hardware is exactly the same on my two PCs and the only difference is the Windows 7 install. Thank you for any help anyone can suggest. harrisdc_24477


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#1
December 30, 2010 at 12:33:21
Did you install the motherboard chip set drivers after installing Windows 7?

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#2
December 30, 2010 at 12:37:44
I installed all motherboard drivers after installing Win7. I treated the installation just like a new first install and therefore needed to install all drivers.
Thank you for your help
Harrisdc_24477

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#3
December 30, 2010 at 14:55:45
When running XP did you have both the internal and external drives formatted using the same file system as the current one. Large files work better with a larger cluster size. NTFS defaults to 4kb.

If both were the same them that couldn't be the problem.


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#4
December 30, 2010 at 17:32:46
I format my internal drives using NFTS. The SD cards are formatted in the camera and so I simply used the SD default formatting both before and after the Windows 7 install. One thing that I did not mention is the XP Pro computer is 32 bit system and the Windows 7 system is 64 bit. I suspect that the different OS is the root cause of my problems, but I really don't know. Thanks again for your help.
Harrisdc_24477

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#5
December 30, 2010 at 19:58:57
I got nothin.

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#6
December 31, 2010 at 05:23:20
othehill,
I really appreciate your help. This really does not make sense to me, but hopefully someone else may read our discussion and something will occur to them. At the same time I installed Win 7 a new 90 gig SSD was installed. It is amazing how fast the new system boots now and how fast my programs load. The only thing I don't now have is the original speed reading my SD cards. I will probably open up both the old XP computer and the new Win 7 computer and swap card readers to see if somehow the slow reader is the problem, other than that I cannot visualize what might be the problem unless the reader is just not compatible with the new 64 bit system. Thanks again for your help. Harrisdc_24477

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#7
December 31, 2010 at 07:03:36
Something did occur to me. Internal card readers generally share bandwidth with TWO additional USB ports. All three are connected to one USB 2.0 controller.

If the external USB ports in this circuit are in use it will slow down the throughput. The difference may be how your external USB devices are connected.

Something else to investigate is the resources in use by the USB controller. They may be shared by other hardware.

Go to Device Manager and right click on an Enhanced USB controller. Choose properties. Viewing the information in all the tabs will show you the percentage of shared bandwidth for that controller. That bandwidth is further shared by the connect USB ports on that circuit. Also, the IRQ in use by the controller may also be sharing the IRQ with other hardware.

You can check that by highlighting the computer listing at the top of device manager and choosing View> resources by connection.


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