This is image compartion:

240 Hz, Over Drive is Extreme:



165 Hz, Over Drive is Extreme:

JackE said:

Is extreme option available with overdrive when you click on the right arrow?

Yes, there are Off, Normal and Extreme options available. But when 240 Hz is enabled, Normal and Extreme options do not take effect (you can see ghosting at first UFO picture).

JackE said:

Do you have freesync model?

Yes, my monitor supports is, but I am not using Freesync since my GTX 970 video adapter does not support it. Also I cannot see information about Over Drive restrictions related to refresh rate from your statement above. I confirm Over Drive is working with Normal and Extreme setting at 165 Hz.

JackE said:

>>>I confirm Over Drive is working with Normal and Extreme setting at 165 Hz.>>>

What resolution are you trying to use?

I tried 1080p and 720p resolution, there is no any difference.

JackE said:

I expected this result. But just wanted to further confirm that you indeed had the sync model.

As you said earlier, OD may well be working at 165Hz. BUT to reach 240Hz, OD must be in extreme mode as apparently available in non-sync models, not fixed in normal mode as the specifications below suggests for sync models . .

Fixed in normal mode means it's locked. So it's not adjustable to extreme even if you try to set it to extreme.  Furthermore, there seems be fine print associated with the sync model regarding 240Hz capability..

(1) DisplayPort™ 1.2/HDMI 1.4 input/output and similarly certified cables required in order to reach 240Hz rates.
(2) Rates may vary depending on model and/or region, computer specifications/hardware and/or set up.

(3) Specifications may vary depending on model and/or region. All models subject to availability.

After further review, I suspect that 240Hz rate in your sync model is only accessible by trying to over-ride the normal mode lock, aka over-clocking. Since your sync model doesn't seem to meet your 240Hz expectations implied in the product descriptions, I suggest that you immediately return the monitor to the vendor as not meeting your needs for a refund or exchange. Do this before the vendor's return merchandise authorization (RMA) period ends. Usually only a few weeks. Sorry.

This is a very weird policy. I don't want to return the product, I want the product to meet the specifications. I have read the product specifications and the User Guide carefully before buy, and found no information about Over Drive function refresh rate limits. Yes, I found when Adaptive Sync is used, Over Drive is fixed at Normal mode, I can accept this. But as I said before, neither Normal nor Extreme Over Drive option work at 240 Hz, both options can be selected, but there is no any effect. I repeat again to be clear, Over Drive Normal mode is not working at 240 Hz. Also I am not using Adaptive Sync technology, but even if I use it, Over Drive Normal mode should be working whatever refresh rate is selected according your specification table above and the product documentation. Please be noted I am using DisplayPort™ 1.2 connection and 1.2 certified cable, so 1080p/240 Hz mode is available and can be selected.
Also I performed some research with CRU tool and found that upper refresh rate limit for Over Drive is 200 Hz. So when refresh rate is set to 201 Hz or higher, the Over Drive is not working at all, looks like the monitor ignores Over Drive selection and forcebly turns it off.
I consider this problem as some kind of hardware or software bug, or maybe as misrepresentation of the product specifications. I hope Acer engineers will take a look at this problem, and release some firmware patch to fix this issue.

Hope for your understanding, thank you.

JackE said:

Sorry. You are posting this to an ACER users forum. We are neither ACER employees, customer service reps, marketing policymakers,  or software/hardware developers or engineers. We are mainly Acer users just like you trying to help other users and have no influence over your hopes.

I'm gonna make some wild guesses that the Predator non-sync models & Nitro sync models are virtually the same hardware platform that share much of the same user controls and advertising hype. However, only the Predator firmware is NOT fixed at or locked into normal in game mode. Essentially, the premium for the Predator is for the firmware, not the hardware. Accordingly, I wouldn't hold my breath waiting for any official patch that'll make your Nitro perform like a Predator even though its hardware might be capable of doing so.

While you may not want to return the product, it's the only practical suggestion I can make in your situation. Sorry again.

Okay, dear, think I got your point, thank you for support.

May I ask one more question regarding XZ320QX? Does is support HDR? From official page, I see HDR10 format is supported, also now I have new RTX 3060 video adapter which is also supporting HDR and DP 1.4. But in Windows 11 setting and HDR-supported games (tested in Resident Evil 7 and Cyberpunk 2077) HDR option is not available, though I am using Display Port cable. Also in monitor OSD I see only DP 1.1 and DP 1.2 options for Display Port version, there is no 1.4 option available. But as I know HDR support was introduced in DP version 1.4.

Should I use special Display Port cable? My cable is certified as 1.2 version, length is about 1.5 meter. From Wikipedia DP description, there is no physical difference between DP cables, the difference is only related to certified throughput, so I am confused.


Here is monitor specs:



And video adapter specs: