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Thread: tweak windows 64

  1. #1
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    Question tweak windows 64

    has anyone had ny luck tweaking windows 64? I recently loaded it, and I'm intrested in doing sme myself.

  2. #2
    Administrator Philip's Avatar
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    Before tweaking, can you post your Analyzer results ? I imagine you can still use the SG TCP Optimizer to tweak it, but I'd like to see the default values as reported by the Analyzer.

    Thanks in advance.

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  4. #4
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    Here is the results

    SpeedGuide.net TCP/IP Analyzer


    TCP properties for IP = 24.170.16.49 ()
    Browser/OS = Mozilla/4.0 (compatible; MSIE 6.0; Windows NT 5.2; WOW64; SV1)
    Notes: Read the Analyzer FAQ if the above is not your IP address.

    TCP options string = 020405b401010402
    MTU = 1500
    MTU is fully optimized for broadband.
    MSS = 1460
    Maximum useful data in each packet = 1460, which equals MSS.

    Default Receive Window (RWIN) = 65535
    RWIN Scaling (RFC1323) = 0 bits
    Unscaled Receive Window = 65535

    Note: Under Windows 9x, if you have RWIN set to any other value, and the Analyzer reports 65535 you might need to install the MS Vtcp386 fix.
    For optimum performance, consider changing RWIN to a multiple of MSS.
    Other values for RWIN that might work well with your current MTU/MSS:
    513920 (MSS x 44 * scale factor of 8)
    256960 (MSS x 44 * scale factor of 4)
    128480 (MSS x 44 * scale factor of 2)
    64240 (MSS x 44)
    bandwidth * delay product (Note this is not a speed test):

    Your RcvWindow limits you to: 2621.4 kbps (327.675 KBytes/s) @ 200ms
    Your RcvWindow limits you to: 1048.56 kbps (131.07 KBytes/s) @ 500ms
    MTU Discovery (RFC1191) = ON
    Time to live left = 114 hops

    TTL value is ok.
    Timestamps (RFC1323) = OFF
    Selective Acknowledgements (RFC2018) = ON
    IP type of service field (RFC1349) = 00000000 (0)

  5. #5
    Administrator Philip's Avatar
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    Thanks. I'd go through the Registry settings manually, possibly change the TCP Window to be multiple of MSS (1460) and possibly increase it if you're on a fast broadband connection.

    However, since we haven't tested with the 64-bit version, just to be cautious, you might want to manually edit the Windows registry with Regedit... I'd go through the Windows 2k/XP settings here and change at least the TCPWindowSize and Tcp1323Opts, then take the Analyzer test again and make sure those values are being changed accordingly.

  6. #6
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    I will try that this weekend as I work a 12 hour midnight shift for the next couple of days. also does it make a difference that there are 2 different windows explorers (one is 64bit the other is 32bit). I have installed the google toolbar, and when i did it put it in the 32bit explorer.

  7. #7
    Administrator Philip's Avatar
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    Not really

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