Does this 2k freesync monitor work with g-sync compatibility? i have win10, gtx 1080ti and latest nvidia drivers but the g-sync options don't populate

Yes, If you go to the Nvidia Control Panel you can enable GSync with these Monitors at 1440p. You need to use DisplayPort cables. Doesnt seem to work with HDMI so just a heads up. Have 2 of them with GSync enabled on a 3060TI

is this able to reach 1440p 144hz through HDMI?

yes, i went ahead and read a comment to use a DP DisplayPort Cable, iVANKY DP Cable 6.6ft/2M, [4K@60Hz, 2K@144Hz But resulting in a washed put Screen even after trying to set up all colors, in the monitor, and Nvidia control panel it did nothing, almost went as far as being disappointed was going to send the monitor back. BUT I thought I will just use the cable I was using for a 24" Dell monitor previously using, soon as I plugged it in looked great, and Ran 144Hz it an HDMI 2.0 why the DP 1.2 didn't work for me have no idea but will send the DP cable back for a refund, so one comment reads, the HDMI 2.0 is capped at 60fps maybe his GPU card, I'm running an EVGA 2070 8GB it's a decent card, also read one person with 2060 there running also @ 144Hz with an HDMI cable, truth is I haven't digged into what a DP cable what would the differences be, but will look into. But as for now its a very Nice Monitor and as for me I'm really happy, still have to set all the Brightness color a little better but for the moment looks great, can turn off the Monitors speakers, and use ur headphones, I tried to jack in my headset with the speakers on but didn't work, but who knows maybe you can use both without turning one-off, I just got my monitor today 6/27/2021, I recommend always buy or try buying when it comes to electronic Brand New, if not and find a good deal just make sure where, and whom ur buying from if used, and you suspect ur package looked like it may be a return, well send it back, cuz ur paid for a "NEW" item so expect to get a new item, well thas all folk and I will or may update this in 6 months to rewrite hows the Gaming monitor holding up.

So I'm seeing some say this isn't g-sync compatible and some say it is. Is there a setting or update you need to do to make it g-sync?

Ian i didn't see the G-sync option in Nvidias Control Panel, I did see a video tutorial on the best setting for a gaming monitor, that person did have the G-sync option in the Nvidia control panel I'm thinking since it's only a compatible Gaming monitor for G-sync, and not fully, guess thas why the G-sync option did not appear, but its like you said we need do nothing to enable for G-sync but you know makes some people scratch the heads, cuz want to be able to enable it physically, but I don't mind I still very happy with the monitor big difference from my previous DELL 24" monitor even that was an ok monitor at 1080P healed me very well until a drop or with Superglue or eeUvresin landed on bottom of the screen was minor but Bugged me, is when i bought this Acer, for $300 bucks its fair, Ian thank you for the vote of confidence on we need not do nothing about having to Enable G-Sync in Nvidias Control Panle i was one too the Scrach my Head Lol

ASIN	B0C1T35BCF
Adaptive Sync	FreeSync
Additional Features	Built-In Speakers, Height Adjustment, Pivot Adjustment, Swivel Adjustment, Tilt Adjustment
Aspect Ratio	16:9
Best Sellers Rank	#2,247 in Electronics ( See Top 100 in Electronics ) #93 in Computer Monitors
Brand	Acer
Brightness	400
Built-In Media	1 x Display Port 1.4, 2 x HDMI 2.0 Ports & 1 x Audio Out Port (Display Port and HDMI Cable Included)
Color	Black
Color Gamut	99.0
Compatible Devices	Desktop
Connectivity Technology	DisplayPort, HDMI
Contrast Ratio	1,000:1
Customer Reviews	4.3 out of 5 stars 653 Reviews
Display Resolution Maximum	2560 x 1440
Display Technology	IPS
Display Type	IPS
Global Trade Identification Number	00195133192330
Hardware Connectivity	HDMI
Has Color Screen	Yes
Image Contrast Ratio	1,000:1
Item Dimensions D x W x H	9.2"D x 24.2"W x 18"H
Item Height	18 inches
Item Weight	5.23 Kilograms
Manufacturer	Acer
Model Name	XV272U W2bmiiprx
Model Number	UM.HX2AA.201
Mounting Type	Wall Mount
Native Resolution	2560x1440
Number of Component Outputs	2
Picture Quality Enhancement Technology	[POSSIBLE]
Power Consumption	2 Watts
Refresh Rate	240 Hz
Resolution	QHD Wide 1440p
Response Time	0.5 Milliseconds
Screen Finish	Matte
Screen Size	27 Inches
Screen Surface Description	Matte
Specific Uses For Product	Desktop, Gaming, Photo Video Editing
Total Number of HDMI Ports	2
Total USB 2.0 Ports	2
Total Usb Ports	2
UPC	195133192330
Viewing Angle	178 Degrees
Voltage	240 Volts
Warranty Description	3 year parts and labor

MONITOR Acer Nitro 27" WQHD 2560 x 1440 PC Gaming IPS AMD FreeSync Premium | Up to 240Hz Refresh | Up to 0.5ms | DisplayHDR 400 | sRGB 99% | 1 x Display Port 1.4 & 2 x HDMI 2.0 | XV272U W2bmiiprx

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