NVIDIA Demonstrates Issues with Non-Validated FreeSync Monitors at CES 2019

Fleat said:
I will be patiently waiting for the enterprising folks out there to test and catalog monitors out there. I am sure we will end up with some sort of wiki as a helpful buyer's guide.



Signal attenuation is a pita and even well made cables reach the limits far before most companies claimed distances. I ended up buying 65ft fiber optic HDMI cables to solve my issues [at a steep price]. They do 4K HDR at 4:4:4 without any problems.
Click to expand...
I got one pretty cheap at monoprice, only half the length though. Blue-somethin' brand.
 
been looking into this further there is a ratio being batted around as a requirement for VRR on Nvidia cards, being 2.4:1 if im working that out correctly then if your monitor has a lower hz range of 48 you would take that and times by 2.4 to work out what VRR would set your max hz to regardless if your monitor supported it or not..

so 48x2.4 = range 48hz - 115hz with VRR enabled

so if my lower end was say 65hz but my monitor only went to 144hz then the range Nvidia would force the monitor to display would be out of spec 65hz - 156hz and therefore cause issues such as blurring and flickering.

thats my current understanding of VRR, if im wrong, more than happy to be corrected. I'd love to see some details on the monitors that failed.

anyone with a 75hz freesync display is probably out of luck, if your fps goes above 75 then your looking at issues.. which i imagine accounts for most of the failures in nvidia's testing.

EDIT

some detailed info here:
 
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Dodge245 said:
been looking into this further there is a ratio being batted around as a requirement for VRR on Nvidia cards, being 2.4:1 if im working that out correctly then if your monitor has a lower hz range of 48 you would take that and times by 2.4 to work out what VRR would set your max hz to regardless if your monitor supported it or not..

so 48x2.4 = range 48hz - 115hz with VRR enabled

so if my lower end was say 65hz but my monitor only went to 144hz then the range Nvidia would force the monitor to display would be out of spec 65hz - 156hz and therefore cause issues such as blurring and flickering.

thats my current understanding of VRR, if im wrong, more than happy to be corrected. I'd love to see some details on the monitors that failed.

anyone with a 75hz freesync display is probably out of luck, if your fps goes above 75 then your looking at issues.. which i imagine accounts for most of the failures in nvidia's testing.

EDIT

some detailed info here:
Click to expand...


This sounds like it could be easily solved by capping framerates inside what your monitor can handle.
 
Dodge245 said:
been looking into this further there is a ratio being batted around as a requirement for VRR on Nvidia cards, being 2.4:1 if im working that out correctly then if your monitor has a lower hz range of 48 you would take that and times by 2.4 to work out what VRR would set your max hz to regardless if your monitor supported it or not..

so 48x2.4 = range 48hz - 115hz with VRR enabled

so if my lower end was say 65hz but my monitor only went to 144hz then the range Nvidia would force the monitor to display would be out of spec 65hz - 156hz and therefore cause issues such as blurring and flickering.

thats my current understanding of VRR, if im wrong, more than happy to be corrected. I'd love to see some details on the monitors that failed.

anyone with a 75hz freesync display is probably out of luck, if your fps goes above 75 then your looking at issues.. which i imagine accounts for most of the failures in nvidia's testing.

EDIT

some detailed info here:
Click to expand...

If its not at least 2.4, its just not certified. It will still work. In your fake case, if you dip below 65fps, LFC will kick in, so that your monitor never sees anything below 65hz. However with such a low ratio, juttter will kick in sooner. It will not run the monitor at 2.4x 65, it will still run the monitor at 65-144hz, below 65 LFC kick in, above 144 you will get tearing. If it makes you feel better, amd freesync LFC wont kick in unless you are at least 2.5x.
 
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