Custom Resolution Utility (CRU)
|
12-28-2015, 04:56 AM
Post: #1916
|
|||
|
|||
RE: Custom Resolution Utility (CRU)
(12-26-2015 11:39 PM)zamar19 Wrote:I mean screenshots are basically RGB 4:4:4 because the pixel data is always RGB. The conversion to YCbCr happens on output.Quote:Screenshots represent the pixel data, not the (card) output.What do you mean? (12-26-2015 11:39 PM)zamar19 Wrote: Also, how a GPU driver can determine monitor color depth choice supported at given resolution, if color bit depth is stated "undefined" in EDID?If the color depth is undefined, it's normally assumed to be 8 bpc. This only applies to EDID 1.4. EDID 1.3 does not have color depth information in the base block. (12-26-2015 11:39 PM)zamar19 Wrote: Indeed, with the option ticked "Import complete EDID", CRU imports bin and exports inf without conversion. But when the exported EDID v1.4 is written to Registry by successfully installing via Device Manager with Sig Control off, upon reboot the newly installed override when exported from Registry shows EDID v1.3 and no YCbCr 4:4:4 in base section in Notepad++. I deleted all other hidden monitors, so no other display profiles are shown in Registry.That's strange. Windows would not convert the EDID override, and neither would the driver. This sounds more like the EDID override is reverting to the previous configuration. Maybe there's something wrong with it. Can you post the .inf file so I can take a look at it? (12-26-2015 11:39 PM)zamar19 Wrote: I tried the test image at 1080P resolution with Just Scan option turned On in the TV Setup GUI. With that option, a 1080P reso desktop is shown centered at native 4K TV reso, but occupies only 1/4th of the entire TV screen as it should (of 4k or 4k UHD native screen?) without scaling to fit. The test image at 100% zoom shows both values equally clear 4:2:2 and 4:4:4 as on this photo, which was scaled down for upload in an image viewer, but shows exactly what I see on screen regardless of RGB or YCbCr 4:4:4 output selected. How to interpret it? Can it mean that at 1080P native reso, the LCD controller converts any incoming signals to 4:2:0, and the test image is confused? In 4K reso it only shows 4:2:2, and on another 1080P monitor only 4:4:4, but not both values at once.That's weird. The TV is messing with the image somehow. Try playing with the sharpness setting if it has one. (12-26-2015 11:39 PM)zamar19 Wrote: How likely Seiki to enable 4:4:4 in firmware owing to customers outcry? Is it competition driven of 4K TVs versus 4K monitors? I think so, since any HDMI2.0 rev B or A port must support 4K@60Hz 8bpc 4:4:4 signal as per HDMI2.0 standard.I have no idea, but maybe they'll do something if enough people complain. (12-26-2015 11:39 PM)zamar19 Wrote: On a relevant note... Can you suggest any tool or method that would ID the DP version (1.1 or 1.2) and profile (HBR or HBR2) used in my V4900 card, or measure max DP throughput? Can I flash GPU BIOS to upgrade the DP profile? AMD site says its v1.2, but Dell spec says its DP (no version given, but V1.1 means twice lower bandwidth limit). The card 800 MHz engine clock seems to allow driving at least one 4K@60Hz 8bpc 4:4:4 display.I don't know of a way to check the DisplayPort version or the bandwidth limits. |
|||
« Next Oldest | Next Newest »
|
User(s) browsing this thread: 109 Guest(s)