Yeah, sorry for my ignorance. I actually just figured this out earlier tonight after realizing that the way I've been calibrating for PC has basically been wrong this entire time, and came back to edit my post to say "Never mind, I'm an idiot."
edit: Okay... wait... I've been using the 4:4:4 EDID override on my Nvidia card for a while now, and at the default settings on brightness, contrast, etc., the High black level setting shows the right levels. Changing to Low crushes all shadowed areas into black and blows out brighter areas. Also, I just checked all three modes (Standard, Wide, PC) with the same main settings (backlight, brightness, contrast, color, color temp) and everything else at default besides sharpness, which is different on the PC mode. Unadjusted, uncalibrated, and unprofiled, the 25% stepped saturations all look very similar but with slight differences in the amount of colour and luminance.
They all show "Screen (RGB-PC)" under the settings. So, how are you supposed to know whether your TV is getting a YCbCr444 signal or an RGB signal? What difference does it make to calibration, and how does calibrating a 4:4:4 PC signal differ from an RGB PC signal?
As I understand it, I'm not actually supposed to touch the grayscale or CMS controls and am just supposed to use the colorimeter and software like ArgyllCMS to calibrate the video card gamma curves and create a profile. I am confused now as to which signal is right, which mode is right, which gamut is right, etc.
"Its ok. We all start out as idiots"
Edited by MDA400 - 2/12/14 at 12:01pm