Custom Resolution Utility (CRU)
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09-08-2015, 06:36 PM
Post: #1650
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RE: Custom Resolution Utility (CRU)
(09-07-2015 07:23 AM)falkentyne Wrote: Does anyone know what Displayport version *reference* R9 290x cards use? Reviews keep mentioning DP 1.2, but the AMD driver won't allow any pixel clock higher than 480 MHz! The refresh rate or resolution is not even available if its 481 mhz. This seems to imply DP 1.1a....DP 1.2 should exceed 600 mhz...The pixel clock limit depends on the number of lanes and the DisplayPort clock speed. You need a DisplayPort 1.2 monitor to get DisplayPort 1.2 speeds. DisplayPort 1.1 max: 4 lanes @ 270 MHz = 360 MHz (8 bpc), 480 MHz (6 bpc) DisplayPort 1.2 max: 4 lanes @ 540 MHz = 720 MHz (8 bpc), 960 MHz (6 bpc) (09-06-2015 02:27 PM)falkentyne Wrote: Reduced porch and sync to 48/1 and 32/1That's a scaler limitation. I've seen that on several monitors. Sometimes the same timing parameters will work with DVI but not with DisplayPort. |
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