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Thanks again, this is by far the most helpful explanation of BFI <-> input lag i've ever seen

Thanks for the detailed explanation chief! If i understand correctly, strobing will basically "pull" all the better/higher rows to the same delay of the worst/bottom row (which is refreshed last). This is because the backlight strobes only once the screen has been fully refreshed (i.e., once all ...

Since i didn't get an answer to this in the VG259QM owners thread, i'll try here: does BFI, and specifically ASUS ELMB, add input lag?

Reason for asking: the reviews of the VG259QM seem to disagree on whether or not ELMB adds input lag. According to the tomshardware review it doesn't [1], but ...

The reviews of the VG259QM seem to disagree on whether or not ELMB adds input lag. According to the tomshardware review it doesn't [1], but according to the RTINGS review the input lag goes up from 1.9ms without ELMB/BFI to 4.3ms with ELMB.

Another strange point is that in the RTINGS review for ...

I want to achieve the best motion clarity (at 300+ fps) while at the same time having the lowest possible input lag.

So i have two options:
280Hz with OD80, ELMB off, VRR off --> lowest possible input lag, good motion clarity
280Hz with ELMB on (OD80 locked), VRR off --> best possible motion ...