Galen Seitz wrote: > Wayne E. Van Loon Sr. wrote: > >> I have both DVI and VGA outputs on a video card. When I blissfully >> switched to a DVI cable on my Hanns-G flat panel, the sharpness of the >> screen was noticeably reduced. I was told that there was a 6 bit DVI >> cable and a later 8 bit DVI cable and that I probably had the 6 bit >> cable. Doing a quick search on DVI cables I discover that there are at >> least DVI-D Single link and dual link; DVI-A; and DVI-I Single Link and >> Dual Link cable types. >> > > The 6/8 bit stuff sounds bogus to me. There are specs for what is > called single and dual link cables. A dual link cable is needed for > high resolutions at high refresh rates(1,920 × 1,080 @ 85 Hz, for > example) or for high pixel depths(>24 bpp). In most instances dual > link is not needed, but I suspect that you would find that most cables > are DVI-D dual link anyway. > > My best guess as to your sharpness issue is either a poor quality > cable or the LCD not being driven at its native resolution. > Galen: I've been real busy and just have not got back to the system that I tried a DVI cable with to make any further tests / observations, but think I may have found out what the fellow was trying to tell me about 8 bit VS 6 bit DVI.
As I understood him, he was telling me it was a difference in the cables, but after looking further, it seems as though some LCD monitors only use 6 bits of DVI color information and "dither" surrounding pixels. See the article at the link below. http://compreviews.about.com/od/multimedia/a/LCDColor.htm I should try DVI with a better monitor. Wayne _______________________________________________ PLUG mailing list PLUG@lists.pdxlinux.org http://lists.pdxlinux.org/mailman/listinfo/plug