Custom Resolution Utility (CRU)
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12-23-2015, 12:31 AM
(Last edited: 12-23-2015, 06:49 AM by zamar19)
Post: #1876
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RE: Custom Resolution Utility (CRU)
Quote:ToastyX Wrote: Thanks for your help and tools! Once I applied your AMD Patcher and rebooted the PC, AMD driver auto identified all missing 4K resolutions for this Seiki 42" 4K SE42UMT monitor. I compared them to CRU options, and they all matched LCD Native timings. No other timing standards work. I was only able to run it at 3840x2160@30Hz 8bpc due to HDMI1.4 bandwidth limit, but the monitor has HDMI 2.0 input, so I'd need a DP1.2-to-HDMI2.0 adapter for this or new HDMI 2.0 card. It runs perfect now at 4K@30Hz with no lag, though I didn't try it with heavy games, and overclocking with this setup isn't possible. Its interesting, AMD FirePro V4900 800 MHz Engine Clock only spec'd at max 2560x1600@60Hz 280Mhz per port (with 2 DP1.2 and 1 Dual DVI), but it runs 4K@30Hz 8bpc 297 MHz easily on 1 port and 1080P@60Hz 8bpc 148.5 MHz on another with no extra fan speed. How do I check its actual resolution limits? Or the max Pixel Clock is the only limit that matters for any card, and everything else in resolution spec is flexible? Do they specify in spec max total pixel clock for all ports of a given GPU running monitors simultaneously, or how the max spec works? One problem I've is it shows 4:2:2 chroma at 4K on test images like this one, despite the monitor is 4:4:4 capable. At lower resolutions it's scaling desktop, so the test results are inconclusive. Do you think its caused by current setup bandwidth limit? Another issue is it only shows 8bit color at any resolution, but its likely because AMD didn't implement yet 10-bit pixel output support in latest Win 10 FirePro drivers as per Release Notes, unless you can suggest some beta driver? The 10-bit option is available in FirePro CC, but it results in black screen upon reboot. Not sure if Win7 & 8 drivers will add 10-bit in Win 10, as they did in Win 7 & 8? Btw, this forum Quote button doesn't work for me in latest FF43. |
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