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New graphics card causes speakers to hum?



 
 
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Old July 20th 04, 06:31 PM
Howie
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Default New graphics card causes speakers to hum?

I just replaced the graphics card on my recording PC to a Chaintech FX
5200 AGP 256MB, with both a DVI & VGA out. I moved my flat-panel
Gateway FPD1500 monitor (DVI conector), from my business PC (with
Cambridge speakers - no hum), next to my recording PC's FPD1700 (VGA
connector). Now my M-Audio BX5 powered monitor speakers (they are next
to the FPDs) emit this loud hum whenever the FPD1500 is powered on,
and any sound files I play are very quiet.
With just the FPD1700 powered on, there is no hum. (Soundcard is an
Audiophile 2496.)
At the same time, I also bought an APC surge suppressor with 11
outlets and plugged everything into that, although plugging either the
speakers or the FPD1500 into a separate wall AC socket made no
difference to the hum.

Any ideas what could be causing this hum?

Thanks in advance,
Howie.
 




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