Custom Resolution Utility (CRU)

[ToastyX]

(10-01-2022 08:24 PM)Peppe90 Wrote:  About this, do you suggest to edit the EDID file, then load it on Nvidia CP, or should I load it first then EDIT with CRU while Windows is seeing it as a already connected monitor?

It would be better to load the modified EDID using the NVIDIA control panel because that's more direct. Too bad they only offer that for Quadro cards.

(10-01-2022 08:24 PM)Peppe90 Wrote:  It is the EDID of a display a fixed file? I'm asking because on CRU I have i.e. 3 times the edid of the LCD Tv (the Benq monitor I'm on now have even 4). Exporting them, they have 3 different MD5. Shouldn't they be the same? Perhaps if I connect the PC with different cables (or extracting using another PC) it could get a different EDID file?

CRU should only have one active entry for each connected monitor. Inactive entries are leftovers in the registry from previous connections or different drivers. Keep in mind the registry only stores the first block, so CRU can't read extension blocks for inactive entries. If you see a "Default extension block" in the extension block list, the exported file won't have the extension block data. Each type of connection can have a different EDID. VGA will say it's analog. DVI will say it's digital. HDMI uses EDID 1.3 and has a CTA-861 extension block with an HDMI data block. DisplayPort normally uses EDID 1.4. The EDID for each port on the monitor normally does not change by itself, although some monitors might have certain settings that can change the EDID. Keep in mind any changes you make in CRU will appear in the exported file. If you didn't make any changes and the monitor is connected and recognized as active, then exporting a file will save the original unmodified EDID.

(10-01-2022 08:24 PM)Peppe90 Wrote:  I also noticed that exporting a EDID through Nvidia CP and CRU (both as TXT, since Nvidia CP only exports as TXT), the MD5 doesn't match.
Opening them on Notepad++ though, I see the values are the same but on CRU letters are uppercase and ordered in more lines instead of a long one. Perhaps this is enough for triggering a different MD5?

MD5 requires an exact match. The best way would be to compare the raw binary data, but the NVIDIA control panel only exports text files. The text formatting shouldn't affect the data as long as the hex values are the same.

(10-01-2022 08:24 PM)Peppe90 Wrote:  Last question: what's the reason i have to put that strange res. instead of just 720x480i / 720x576i?

720x480i/576i is normally double-clocked, but there's no way to specify a double-clocked resolution in the EDID. 1440x480i/576i produces a similar signal that the TV can handle. The EDID stores the number of lines per field, so 240 for 480i and 288 for 576i.