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Test the overdrive in freesync

Talk about AMD's FreeSync and VESA AdaptiveSync, which are variable refresh rate technologies. They also eliminate stutters, and eliminate tearing. List of FreeSync Monitors.

Test the overdrive in freesync

Postby elgreco » 13 Jan 2019, 18:16

Hi guys,

On the 15th Nvidia cards are going to support freesync. Now I was curious if there is any test out there where I can test if my monitor has dynamic overdrive. Because I think with freesync it's locked in normal or extreme with VG270UP but maybe it is because the monitor does the work itself?
elgreco
 
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Re: Test the overdrive in freesync

Postby Chief Blur Buster » 14 Jan 2019, 02:42

Dynamic overdrive capabilities are sometimes hidden in undocumented settings, e.g. DDC commands and the like. Other times, the monitor already has dynamic overdrive during FreeSync, and meets "good-enough" quality to pass NVIDIA certification.

Alternatively, dynamic overdrive can theoretically be done as a GPU shader, since much of it is simply overshoot colors to help speed up pixel transitions by intentionally landing the pixel undershoot closer to its final color, by specifying an intentional overshoot color. It works as long as the colors are not fully black / fully white. I'm not sure if NVIDIA graphics drivers do that, but in theory, dynamic overdrive can be done ala software (like old-fashioned ATI Radeon Overdrive feature in old ATI drivers from many years ago -- but reborn for VRR).
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Re: Test the overdrive in freesync

Postby elgreco » 14 Jan 2019, 08:25

Chief Blur Buster wrote:Dynamic overdrive capabilities are sometimes hidden in undocumented settings, e.g. DDC commands and the like. Other times, the monitor already has dynamic overdrive during FreeSync, and meets "good-enough" quality to pass NVIDIA certification.

Alternatively, dynamic overdrive can theoretically be done as a GPU shader, since much of it is simply overshoot colors to help speed up pixel transitions by intentionally landing the pixel undershoot closer to its final color, by specifying an intentional overshoot color. It works as long as the colors are not fully black / fully white. I'm not sure if NVIDIA graphics drivers do that, but in theory, dynamic overdrive can be done ala software (like old-fashioned ATI Radeon Overdrive feature in old ATI drivers from many years ago -- but reborn for VRR).


Ah ok didnt knew that they could do that with software. But is there any real test out there to check if your monitor does have a dynamic overdrive.

I saw on your other website with all the test you only have vrr simulation, but not a vrr test.
elgreco
 
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Joined: 15 Dec 2018, 21:57

Re: Test the overdrive in freesync

Postby elgreco » 15 Jan 2019, 11:16

elgreco wrote:
Chief Blur Buster wrote:Dynamic overdrive capabilities are sometimes hidden in undocumented settings, e.g. DDC commands and the like. Other times, the monitor already has dynamic overdrive during FreeSync, and meets "good-enough" quality to pass NVIDIA certification.

Alternatively, dynamic overdrive can theoretically be done as a GPU shader, since much of it is simply overshoot colors to help speed up pixel transitions by intentionally landing the pixel undershoot closer to its final color, by specifying an intentional overshoot color. It works as long as the colors are not fully black / fully white. I'm not sure if NVIDIA graphics drivers do that, but in theory, dynamic overdrive can be done ala software (like old-fashioned ATI Radeon Overdrive feature in old ATI drivers from many years ago -- but reborn for VRR).


Ah ok didnt knew that they could do that with software. But is there any real test out there to check if your monitor does have a dynamic overdrive.

I saw on your other website with all the test you only have vrr simulation, but not a vrr test.


I figured this VG270UP doesn't have dynamic overdrive, to bad makes the VRR quite useless because 100-144hz has bad response times on OD normal.
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