Acer Predator z271

Talk about NVIDIA G-SYNC, a variable refresh rate (VRR) technology. G-SYNC eliminates stutters, tearing, and reduces input lag.

Acer Predator z271

Postby kandor1978 » 23 Dec 2016, 07:44

Hi everyone,

I have a Acer Predator Z35 my self and I got my son a Z271 for Christmas
I decided to test the screen to see that it works when he opens it up tomorrow
Anyway I like the monitor but there is one issue with it
I see flickery brighness when it is changing refreshrate all the time, this is at different rates depending on how much changes there is and it basically flickers very much when it reaches the under 30fps
Do you guys think this is something to be expected with Gsync monitors?
On my z35 the brightness changes sometimes but far far less than this monitor.
I would say it has about 10% of what this monitor has

So should I RMA the monitor or just change to a different model? Kind of in a hurry to do so as Christmas is tomorrow

Best,
Kandor
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Re: Acer Predator z271

Postby jorimt » 23 Dec 2016, 12:09

TFT Central did an in-depth review of that panel, and they confirmed it had a flicker-free backlight:
http://www.tftcentral.co.uk/reviews/acer_predator_z271.htm

So, I can only assume what you're running into is the issue described here:
https://www.pcper.com/reviews/Editorial/Look-Reported-G-Sync-Display-Flickering

I have an XB271HU IPS display, and though the issue rarely occurs, I've seen slight flickering on load screens in games like Half-Life 2 with G-Sync enabled.

Unless it is extreme on your display, I assume it is normal, and the severity is probably going to vary from monitor type to monitor type (TN, IPS, VA, etc), and system to system. I know VA panels have slower G2G response times and more overshoot in certain transition ranges, so that could be exacerbating the flickering/brightness fuctuations when directly compared to other panel types.

Needless to say, the more the system can keep a steady and consistent framerate/frametime, and avoid sharp drops to <30 during gameplay (you can't avoid this with load screens, obviously), the less you are going to see this issue.
Win 10 64-bit • Acer Predator XB271HU • ASRock Z87 Extreme4 • EVGA SuperNOVA 750W G2 • i7-4770k @4.2GHz • Hyper 212 Evo • EVGA GTX 1080 FTW GAMING ACX 3.0 • 16GB G.SKILL Sniper DDR3 @1866MHz • 256GB Samsung 850 Pro • 5TB Western Digital Black 7200 RPM
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Re: Acer Predator z271

Postby kandor1978 » 23 Dec 2016, 12:44

Hi there,

Thanks for replying to my post
Yes I think it is very real issue on this monitor but the thing is it fluctuates in the brightness in high fpses as well
My Z35 which is also a VA does maybe 10% of this monitor
Anyway I went and got a Acer Predator XB271HU and have now tested it
Damn beautiful monitor :)
I tried it at overclocked mode of 165hz but the image is blurrier than it is at 144hz (which is not blurry)

And its so nice colors

Anyway problem solved :)

Best,
Kandor
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Posts: 44
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Re: Acer Predator z271

Postby jorimt » 23 Dec 2016, 12:59

Ah, good choice ;)

And yes, the 165 Hz mode has slight slower G2G response times than 144 Hz on this display, which translates to more motion blur @165 Hz, especially during certain transitions. A reason why I only use 144 Hz.
Win 10 64-bit • Acer Predator XB271HU • ASRock Z87 Extreme4 • EVGA SuperNOVA 750W G2 • i7-4770k @4.2GHz • Hyper 212 Evo • EVGA GTX 1080 FTW GAMING ACX 3.0 • 16GB G.SKILL Sniper DDR3 @1866MHz • 256GB Samsung 850 Pro • 5TB Western Digital Black 7200 RPM
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Re: Acer Predator z271

Postby kandor1978 » 23 Dec 2016, 13:12

I did a monitor calibration with my eyeone pro and set it to 100 cdi which I prefer over standard 120 that seems to be for LCD displays when calibrating

Absolutely breathtaking colors, sharpness and contrast

Now I want to keep this monitor for my self rather than give it to my son :D
Actually seriously considering to give him my Z35 which is by no means a bad present haha

Will see what I do.

Best,
Kandor
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Posts: 44
Joined: 09 Aug 2016, 20:02

Re: Acer Predator z271

Postby kandor1978 » 23 Dec 2016, 13:29

By the way got the new monitor also to work in ULMB and Gsync mode at the sametime

All I need to do is in CRU to copy the resolution settings from 120hz, 100hz or 85hz modes and add 1 extra pixel to vertical and horizontal resolution

Then ULMB gets activated and Gsync is also still working
But I get the flickering with this monitor to in this mode, give it a try and see if it is acceptable for you or not

Best,
Kandor
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Posts: 44
Joined: 09 Aug 2016, 20:02

Re: Acer Predator z271

Postby jorimt » 23 Dec 2016, 15:47

kandor1978 wrote:Now I want to keep this monitor for my self rather than give it to my son :D
Actually seriously considering to give him my Z35 which is by no means a bad present haha

Tough choice :P

kandor1978 wrote:By the way got the new monitor also to work in ULMB and Gsync mode at the sametime

All I need to do is in CRU to copy the resolution settings from 120hz, 100hz or 85hz modes and add 1 extra pixel to vertical and horizontal resolution

Then ULMB gets activated and Gsync is also still working

Thanks for the info, I may give it a try sometime.
Win 10 64-bit • Acer Predator XB271HU • ASRock Z87 Extreme4 • EVGA SuperNOVA 750W G2 • i7-4770k @4.2GHz • Hyper 212 Evo • EVGA GTX 1080 FTW GAMING ACX 3.0 • 16GB G.SKILL Sniper DDR3 @1866MHz • 256GB Samsung 850 Pro • 5TB Western Digital Black 7200 RPM
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