It was working ok in Gsync compatible mode. I'm on laptop rtx2060. I only play Fortnite tho so there's no huge fps drop in game compared to other heavy games. Stable 120-144hz limited using RTSS to 144 with in game 160fps cap. Maybe others can chip in as well their experience

Mini DP to DP. I'm on Illegear Onyx with mDP. Doesn't work on HDMI to DP plus that will lock it to 120hz.

Hmm. It works fine on mine. Testing using duplicate, extend and second screen only. My laptop has a fixed of 144hz. Maybe try to make sure it is set to DP1.4 in monitor settings.

My power management mode is set to Adaptive. Seems ok as well on Prefer Maximum Performance when I tested it out before. The only I can't do is 10bit on 144hz. 10bit only works on 120hz after setting in Nvidia control panel. That is a known monitor limitation. I'm ok with 8bit 144 as I don't do color stuffs. Didnt notice any improvements in my games as well on 10bit

Mini DP to DP. I'm on Illegear Onyx with mDP. Doesn't work on HDMI to DP plus that will lock it to 120hz.

Hmm. It works fine on mine. Testing using duplicate, extend and second screen only. My laptop has a fixed of 144hz. Maybe try to make sure it is set to DP1.4 in monitor settings.

My power management mode is set to Adaptive. Seems ok as well on Prefer Maximum Performance when I tested it out before. The only I can't do is 10bit on 144hz. 10bit only works on 120hz after setting in Nvidia control panel. That is a known monitor limitation. I'm ok with 8bit 144 as I don't do color stuffs. Didnt notice any improvements in my games as well on 10bit

If HDMI it will only allow max 8bit color at 120hz. Even Gsync option will not show up. Once u plug in mini DP to DP then G-Sync option will be available in Nvidia control centre where you can toggle it to on. Enabling 10bit color is inside Nvidia control centre as well where you can choose the color mode.

Control Centre > Change Resolution > Use Nvidia color settings > Output Color Depth (change 8bit to 10bit but this only works if you set max freq to 120hz and I think only on DisplayPort)

If you are using mini DP to DP, then G-Sync (compatible) option should be enabled in Nvidia Control Centre. U can choose either to do full screen or windowed version of freesync. If you enable Gsync in Nvidia control centre, you need to enable freesync toggle in monitor settings for it to work. If it is still disabled, then maybe something is wrong with your cable.

If freesync is ON, then it will be autodefault and locked to normal overdrive. If you off freesync, then only you can change it to extreme.

Btw do make sure u order one that supports 1440p@144. There are also miniDP to DP that's only 1080p@144hz and 1440@60hz. Can double check inside comments or query them on max support for 1440p to confirm. I think max length would be 1.5m as 1440p@144hz is quite demanding but 1M should suffice for most people (for both laptop and desktop 2nd screen usecase)