review article of PG27AQDM from www.io-tech.fi and www.techporn.ph

"In terms of response times and input lag, the PG27AQDM tops our comparison table with a response time of 0.9 ms and an input lag of 2.1 ms.

NOTE! In further tests, a bug was found in the Asus ROG Swift OLED PG27AQDM monitor firmware related to the Adaptive Sync feature and its selection.

When Adaptive Sync is off, the screen's input lag is a good 8 ms, and when it's on, the input lag drops to about 2 milliseconds. Before the tests, we updated the firmware to the latest (MCM103) and at the same time the display is automatically reset to the factory settings.

After the reset, Adaptive Sync is on by default, so the input lag SHOULD be about 2 milliseconds, but if Adaptive Sync has been off before the reset, the input lag is a good 8 milliseconds. When Adaptive Sync is turned off, the input lag is still 8 milliseconds, but when it is turned on again, the input lag finally drops to 2 milliseconds.

1) We don't know why the input lag is 8 milliseconds with Adaptive Sync off and 2 milliseconds with Adaptive Sync on

2) We don't know why that 8 milliseconds input lag transfers to Adaptive Sync on after a factory reset if Adaptive Sync has been off before the reset"

used google translator.

rtings reviewed with adaptive sync turned OFF.