Hence, the color quality of the images looks far from what it should.īelow is a table that shows the basic readings taken from the AOC i2473Pwy, which when connected using HDMI, is set to use a Limited Range RGB, a Full Range RGB, and YCbCr444 (another signal type that is commonly used).ĭuring the test that was conducted using the above setup, a Spyder4Elite (for Gamma and White point measurement) and a Konica-Minolta CS-200 were used. The Gamma curve is shifted than normal, making many shades appear lighter than they should. If you look closely, the color Black appears as dark Grey. The monitor now displays a ‘washed out’ look – lacking the appropriate color depth and variety. The result of this mismatch is obvious when observed closely. But this categorization of the connection makes the GPU send out a color signal of Limited Range RGB (16-235). The monitor is designed to process a Full Range RGB (0-255) color signal. The problem happens because of the effect that this has on the color signal. The resolution being out on the wrong list is not the issue here. But when we connect a gaming display, say the Dell U2414H, using a Display Port – which is a PC connection not in use by the TV screens, it is categorized in the same way. Now this recognition behavior is typical for full HD displays. If you got to NVIDIA Control Panel>Display>Change resolution, you can see that it will be listed as ‘1080p, 1920 x 1080 (native),’ under ‘Ultra HD, HD, SD.’ When we connect a monitor with a resolution of 1920X1080 (common with HDTVs) to the GPU by using a DVI-HDMI or an HDMI cable, the GPU registers it as an HDTV, and not as a monitor. The problem lies in how NVIDIA GPUs handle the HDMI signal. Hence, contrary to popular belief, the image quality between these three is not equivalent. However, an HDMI is designed as a universal signal port. The DVI and the DP are manufactured from the ground up as monitor ports. HDMI or the High-Definition Multimedia Interface is an audio/video interface that is designed differently than the DVI (Digital Visual Interface) and the Display Port. A quick guide to the common problems and the fixes when using an HDMI connection with a NVIDIA or AMD GPU
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