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I am wondering if there is anything I can do to lower or prevent VGA cable interference? I have a PC with a HD 7850 OC 2gb linked to a 1080p VGA only monitor. The display always has fluctuating horizontal bands in graphics heavy programs (like games), much more noticeable in dark areas but present everywhere. Here are the things I have tried and that haven't helped;

  1. Different cable with ferrite cores. No change
  2. Everything plugged into different sockets. No change
  3. Different VGA only monitor. No change
  4. Vertical sync on. Off. Forced. Every availible resolution. No change
  5. Wrapped the vga cable in tin foil and duck tape (don't laugh, read it as a suggestion on another forum :P). No change
  6. Swore and threatened cables/PC equipment. No change

    Is there anything at all I am missing? I really cant afford to buy a new HDMI monitor at the moment as I just got the HD7850 and that took me months to save for :/ Anything at all worth a shot?

Thanks for any and all replies in advance.

share|improve this question
If you have tried different monitors and cables, the only thing left is your new graphics card... – Mokubai Mar 17 '13 at 22:07
"Wrapped the vga cable in tin foil and duck tape" -- If you didn't ground the foil, then this wouldn't really do anything as you found out. It probably wasn't "tin foil", but aluminum foil. It's not "duck tape", but duct tape. OTOH the quality of most VGA cables is suspect. First of all the VGA connector, aka HD15, is a crappy video connector. So high quality monitors and projectors use five BNC connectors instead of the HD15. For a high bandwidth signal that 1080p requires, consider a quality coax such as this. – sawdust Mar 17 '13 at 22:16
Actually you haven't proved that the cause is "cable interference". Seems like you have a "video problem" with unknown cause. You are guessing that the cable is the cause. What is the make & model of this monitor? Was the "different" monitor the same or a different make & model? – sawdust Mar 17 '13 at 22:25
Thanks Mokubai and Sawdust. – Ara Mar 18 '13 at 3:11
Thanks Mokubai and Sawdust. The other monitor was a completely different make and model with a different native res also. The first is a AOC 2436s 1080p, other HP 1440x900 vga only one. I'm assuming its the cable from reading descriptions of the effect that I get on screen. If it could be something else (easier to fix) then that would be great. Also thanks for the link Saw, if it is the cable saves me a googling. (on a side note, I know duct tape is called duct tape, Duck tape is a brand named duct tape and the name stuck^^). Thanks again guys. – Ara Mar 18 '13 at 3:17

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