Monday, 4 March 2019

Refresh Rates CheatSheet for 4K TVs

Hi

Time to dump a load of info here:



Increased Refresh                                             Increased Resolution
----------------------                                                --------------------------

4K/60hz =                                                        4K/60hz =

1080 @ 240hz                                                  3200x2400 @ 72hz*
-2K-                                                                  3840x2400 @ 60hz
1536 @ 162hz                                                  4096x2560 @ 55hz
1440 @ 144hz                                                  5120x2160 @ 50hz
-3K-                                                                  5120x2560 @ 44hz
1800 @ 96hz                                                    6120x1900 @ 50hz
2048 @ 72hz*                                                  6120x2160 @ 40hz
                                                                          6120x2560 @ 35hz


All used NVCP. All used CVT Reduced Blank. on my Philips 4K 58" HDR TV (HDR was of course off). No Down or upsampling was used for the above resolutions, however in the pictures I think? I still had two test down sampled resolutions, but 95% of the ones in the pics are all active pixels.







To show all pixels were active:


------------------
Use this info at your own risk.



*3641x2048 = 16:9 for 2048p

*3K pix, but 2400 wider so 72hz.
-------------------

Big shoutout to those who helped me no end with their work and websites:

ARC  Aspect Ratio Calculator
https://andrew.hedges.name/experiments/aspect_ratio/

Good place to start learning:
https://en.wikipedia.org/wiki/List_of_common_resolutions

General Approximations of Terms:

      2 million pix.   = 1K commonly; 1920x1080
3 to 4 million pix   = 2K commonly; 2048x1536 and 2560x1440
5 to 7 million pix   = 3K commonly; 3200x1800
8 to 10 million pix = 4K commonly; 4096x2160
11  to 20 mil. pix   = 5K commonly; 5120x2160, 5120x2880
20 to 30 mil. pix    = 6K commonly; 6400x4096
30 mil. to 36 mil pix = 7K commonly; 7680x4320
 37 mil. pix is 8K   don't get sucked into the 7K as 8K nonsense, 8192x4608 is *true* 8K. It comes from 8 for the first digit.                                                               

4K TV =
(2 million pix.)   = 1K  //// 244hz
(3 to 4 million pix(   = 2K //// 162hz
(5 to 7 million pix)   = 3K //// 144hz
(8 to 10 million pix) = 4K  //// 60hz
(11  to 20 mil. pix)   = 5K  //// 50hz
(20 to 30 mil. pix)    = 6K  //// 40hz
(30 mil. to 36 mil pix) = 7K //// 30hz?
 37 mil. pix is           =   8K //// 20hz?

above is a rough guide to ?K x 2K
But the higher the V-Res, the harder it hits the refresh rate.. asin~
6K x 2K has a baseline of 40hz but
6K x 3K, 6144x3456 overall is 27hz max. clean.
This is because.. well.. idk.. but I strongly suspect it has something to do with the reason V-Sync uses vertical refresh and not horizontal.

My panel in 1K did 243 because 244hz gave me a bit of wobble.. but since 240 is 100% stable and the refresh so high, I don't want to argue over a couple of hz.

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