Are the "ferrites" (the round things) at the extremes of a monitor cable (both DVI and VGA) supposed to make them less lossy? I.e., better for my own use.
The issue is I bought a KVM DVI Switch that came with cables. I pointed out to the shop that the cables look sub-standard, cos although they are quite thick, they don't have them round things at the ends. They said it doesn't matter. I was getting noise with on my big external screen, and when I borrowed somebody else's DVI cable (with them round things, but thinner) the noise was reduced by about 50%.
Also I read somewhere that the ferrites just stop the cables from interfering with outside things so much.