8 emails later from Entech, running out of timings to try, but big kudos to Ashley@Entech for taking so much time to help a customer. There are a couple of other companies directly involved here that could take note.
Musings so far:
- I can get it to display the same corrupted image at 60hz (344.494 pclk), so high and low refresh isnt helping, but presume 319.750 pixel clock is the sweet spot it wants
- I even tested the "nVidia Matrox"settings down to
50Hz on the Dell 2208 and 51Hz on the Zalman, it would appear these monitors are very tolerant of frequency's (they displayed the same corrupted image at those extremes.)
- Very sensitive to horizontal timings, it wont display anything it if above *or* below 5376 total horizontal ("active pixels" in nVidia language). This is made up of Resolution + Front/Back Porch + Sync Width.
- Some minor play in Vert timings, will go little over and above 1068 total however Vert Sync Width less than 4 doesnt work at all
Here is what the corruption looks like, missing pixels and stretched horizontally and off the edge of the right screen, this is an ATI 4870 at 5040x1050:
Questions:
- How does the TH2G actually work out where to cut the images its presented horizontally?
- Why does only one DVI port on ATI cards work when both are meant to be Dual Link DVIs?
- Is there something simply broken in ATIs DVI/TMDS implementation?
- It there something else "in" the nVidia drivers thats not in the ATI drivers/Powerstrip
- Was there ever any real info on why the ATI range are not doing ultra high-res output... technically all this should be working, especially with the aid of a tool like Powerstrip picking up up the major slack in ATIs drivers?
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