Does the LG CX or C1 Have Additional Latency in 1920x1440 and 2560x1440?

[sofakng]

Has anybody been able to lag test the LG CX and/or C1 in 1920x1440 or 2560x1440 resolution?

I have a Time Sleuth for lag testing but it doesn't support anything higher than 1920x1200.

Also, is there any benefit to using 2560x1440 if our TV supports 1920x1440? If I understand correctly 2560x1440 is only useful as a workaround if 1920x1440 doesn't work on your TV? (it's using pixel repetition which sources from a lower resolution, doesn't use square pixels, doesn't work with all cores, and doesn't work correctly with some filters?)

[FoxbatStargazer]

My life in Gaming has a video on the C1 and C2, check out this timestamp for 1440p results. Basically the C1 in 1920x1440 is 8 ms more than 1080p on standard or BFI modes, but seems to be an identical 2ms in boost mode. (watch a bit more and you can see how much worse the C2 is!)

Their methodology was to basically plug a time sleuth into a retrotink 5x and use that to upscale. The tink adds about 3ms lag which they have compensated for.

2560x1440 is more like 1280x1440... its slightly less pixels than 1080p, and its less pixels where it counts, the horizontal axis, which needs interpolation even when using v-integer scaling to get your scanlines even. Basically if you really want 16:9 I would use 1080p, it scales nicer on a 4K display anyway, and 5x cut/crop can be pretty sweet.