Terrible File Sharing (CIFS/SMB) Performance (Windows 7 SP1)

Discussion in 'Windows 7 Networking' started by powerofpi, Dec 16, 2011.

  1. powerofpi

    powerofpi New Member

    Dec 16, 2011
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    Terrible File Sharing Performance on Windows 7 Pro x64 SP1

    I am experiencing horrible network share performance with Windows 7 Pro x64 SP1. I have two PCs connected directly with a gigabit ethernet cable and static IP addresses. PC#1 hosts a CIFS/SMB shared folder.
    • Yesterday, I was backing up from a CIFS share on PC #1 (running Ubuntu 11.10) to PC #2 (running Windows 7 Pro x64 SP1) at a sustained transfer rate of 80MBps.
    • After installing Windows 7 on PC #1 and recreating a CIFS share, I am trying to transfer back the files from PC#2. However, now that both PCs are running Windows 7, I get a transfer rate of 5MBps.
    • I have installed all Windows updates and the latest drivers for the network cards on both PCs, yet I still observe a 16x slowdown after I replaced Ubuntu with Windows 7 on PC#1.

    Any idea why, or how to fix it? Thank you in advance.
    #1 powerofpi, Dec 16, 2011
    Last edited: Dec 16, 2011

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