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I'm trying to access a Windows computer on my 100Mbit LAN with TightVNC server on a Windows 7 box, and using vnc4viewer on the Linux machine; I have also tried the Java TightVNC viewer. However it's very slow: clicking is only recognized half of the time, moving windows is too slow to really do.

If however I access the same computer from outside the network, it's much faster.

  1. Could I be missing a reason for it to be so slow? Network usage is under 0.44%. CPU usage is under 2% across all cores.

  2. If there's no problem, how can I tell it "it's okay to use more bandwidth"?

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Exactly which server and clients are being compared? Also, why not RDP? – afrazier Sep 27 '11 at 23:39
@afrazier : I want to be able to use 3d applications; RDP actually replaces the video driver in Windows with a software device that outright denies any 3d. I am using TightVNC server on the Windows box, and the Java viewer on the Linux box. I also tried the viewer xvnc4viewer. – user99426 Sep 27 '11 at 23:44
You tried xvnc4viewer and got the same result - poor performance? – Paul Sep 28 '11 at 6:08
@Paul: Yes. I just tried UltraVNC on my WIndows box with the driver installed and it's still just as bad. – user99426 Sep 29 '11 at 15:31

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