Losing time when using DVI and not VGA?

Hello.

Does anyone know why using DVI makes my computer's clock/time slow down?
I notice the the slow downs even after a minute of using DVI. If I use
VGA (with a DVI adapter), then I have no problems. I also can make it
stop losing its time if I disable all video accelerations in Windows XP
Pro. SP3's display hardware acceleration. Also, it seems like watching
videos in DVI with video accelerations make clock/time slow down even
faster.

You can read my old Windows XP Pro. SP3 primary computer
specifications/details at
http://zimage.com/~ant/antfarm/about/computers.txt ...

Thank you in advance.
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