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Best 240-280hz Monitors

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NCX:
Last Update=August 17th 2020

2020 Reviews Added Here

2018-2019 Reviews Added Here

Best Monitor Review Sites: Monitor Review Resource Center

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Always purchase from retailers with hassle free return and exchange policies.  Read retailers return and exchange policies before buying.
My recommendations are based off of testing more than 60 monitors and reading in-depth reviews from over fifteen reviewers across the realm.

Best Monitor Review Sites: Monitor Review Resource Center

Many monitors not found in this thread likely perform well, but it makes more sense to buy well reviewed monitors, and I like having sources to refer to, even though I do not always agree with them.

If a monitor is not mentioned it is because it has not been reviewed properly, been reviewed at all or is mediocre.  All monitors suffer from regular quality control issues: back-light bleeding and pixel issues (dead and stuck pixels).

Recommendations are PWM or Flicker Free:
I do not recommend monitors which use low LED PWM Dimming frequencies since they ruin motion clarity and cause some people to suffer from health issues like head aches and eyestrain.  LED PWM Dimming Side Effects.

NCX:
Table Of Content

More 144-240hz Monitor Buying Guides
Banding
Best 240-280hz with AMD Free-Sync and/or Back-Light Strobing
Best 240-280hz with Nvidia G-Sync
Correct Display Height=Reduced AHVA/IPS/PLS Glow
Improve Perceived Contrast/Black Depth & Reduce Glare With Bias Lighting
Acer
Alienware (Dell)
AOC
Asus
BenQ
Crossover
Eizo
HP
iiyama
Lenovo
LG
MSI
Samsung
ViewSonic

NCX:
More 144-280hz Monitor Buying Guides

Best Reviewed Flicker Free 1080p 144hz+ Monitors
Best Reviewed Flicker Free 1440p 144hz+ Monitors
Best Reviewed Flicker 240-280hz Monitors

NCX:
Banding

Dawn Engine Banding by Dr NCX, on Flickr
Some AUO TN and Samsung VA panels suffer from very obvious and frankly horrific banding when viewing the above Dawn Engine image, this 60fps Westworld trailer and some dark content or scenes in games and non-interactive media (movies, TV shows, YouTube, ect).  Dark content banding examples:

Dawn Engine Banding

Dell S2417DG Banding 2 by Dr NCX, on Flickr


Westworld BandingSpoiler (hover to show)
Dell Banding 1 by Dr NCX, on Flickr

The BenQ Zowie RL2460, Dell S2719DGF and ViewSonic VX2458-mhd (all tested by me) are free from very obvious banding when viewing both the Dawn Engine image and Westworld trailer both before and after calibration, but I did see minor banding and compression artifacts not present on my AHVA, IPS and PLS panels when viewing some dark content on the TN panels listed above.  The banding is caused by both the source and the monitors.  If I zoom in very closely to the Dawn Engine image on my ViewSonic VP2780-4K (8 bit +FRC 4K IPS with 14 3D LUT) a tiny bit of banding is preset.  Here are the BenQ Zowie RL2460 and ViewSonic VX2458-mhd

BenQ Zowie RL2460 TN Panel Dawn Engine Lights On
Spoiler (hover to show)
BenQ Zowie RL2460 Dawn Engine Lights On by Dr NCX, on Flickr

Qnix QX2710 PLS Panel Dawn Engine Lights On
Spoiler (hover to show)
Qnix QX2710 Dawn Engine Lights On by Dr NCX, on Flickr

Samsung F2380MX C-PVA Panel Dawn Engine Lights On
Spoiler (hover to show)
Samsng F2380MX Dawn Engine Lights On by Dr NCX, on Flickr

ViewSonic VX2458-mhd TN Panel Dawn Engine Lights On
Spoiler (hover to show)
ViewSonic VX2458-mhd Dawn Engine Banding Lights On by Dr NCX, on Flickr
When the lights are off a bit of banding is visible, especially on the F2380MX which performs the worst despite using a true 8 bit panel, though the banding is only very obvious when viewing the monitor off angle.

None of the monitors mentioned suffer form obvious banding when displaying this screen shot from The Order 1886 which I display and take a photo of every monitor I test

Reddit Posts with banding:https://www.reddit.com/r/Monitors/comments/9jjcio/24_1080p_144hz_gaming_monitor_without_colorbanding/
https://www.reddit.com/r/Monitors/comments/95t20w/dell_s2417dg_s2716dg_owners_is_color_banding/

NCX:
Best 240h-280hz with AMD Free-Sync
and/or
Back-light strobing
27" 1080p monitors are ranked lower than 25" if similar or worse

#1 Acer Nitro XV273 X (20-240hz AMD Free-Sync & back-light strobing) IPS
#2 Alienware AW2720HF (20-240hz AMD Free-Sync) IPS
#2 LG 27GN750 (40-240hz AMD Free-Sync) IPS
#4 HP X27 (2560x1440 ?-240hz AMD Free-Sync) 8 bit TN
#4 Samsung C27RG50FQ (?-240hz AMD Free-Sync & back-light strobing) VA
#5 Alienware AW2518HF (40-240hz AMD Free-Sync) TN
#6 Gigabyte Aorus KD25F (40-240hz AMD Free-Sync & Aim Stabilizer/back-light strobing) TN
#6 Acer XF252QX BMIIPRZX (40-240hz AMD Free-Sync & back-light strobing) TN
#7 LG 27GK750F (48-240hz AMD Free-Sync & back-light strobing) TN


The Acer Nitro XV273 X uses a 240hz AHVA panel (marketed as IPS) with more even and vibrant colors, and less restrictive or wider viewing angles than both TN  and VA panels, is significantly faster than VA panels, and is slower than 240hz TN panels, but still fast enough for most.

AHVA Acer XV273 X versus Acer XF252Q TN panel 240hz oscilloscope measurements by TFT Central.

The Acer XV273 X is significantly more accurate, has superior gradient handling, vastly superior 60hz overdrive, and slightly lower input lag at 60hz (11.4ms vs 15ms), but slightly slower, though still excellent 240hz overdrive versus the Alienware AW2720HF.

The Alienware AW2720HF is preset to the RPG mode which is fairly accurate, but has too high (2.39 average) and skewed gamma resulting in colors and shades being a bit too dark, and loss of detail or black crush when viewing dark content.  The Alienware also can not fully cover the SDR (HDTV/REC 709 & sRGB) color spaces, so it can not display some colors as accurately and vibrantly as it should, even when calibrate, but it does come close to doing so (97%), and can still be considered good.  The AW2720HF has negligible input lag and offers very fast and nearly completely overshoot free pixel response times at 240hz when the Fast  overdrive setting is used, but has slow pixel response times and higher than average (negligible; 15ms delay at 60hz vs typical 9-10ms measured by Rtings) at 60hz which prevents it from being an outstanding console and PC gaming monitor.

The LG has low average gamma (2.05) resulting in some washed out colors and shades, and suffers from a slight pink tint, but covers 99% of the sRGB color space or does not suffer from color de-saturation (assuming correct gamma).  The 27GN750 has negligible input lag at both 60hz and 240hz, and has very fast pixel response times at both refresh rates which makes it great for both 60hz console and 240hz PC gaming when the Faster Response Time setting is used.

The HP Omen X 27 uses a 2560x1440, matte 8 bit TN panel which is very accurate and supports local dimming and partial HDR color support.

The Samsung C27RG50FQ used a curved (1500R) VA panel with more even and vibrant colors, and less restrictive or wider viewing angles than TN panels, but has slower pixel response times (more ghosting) and suffers from horizontal gamma shift while TN panels suffer from vertical gamma shift. 

The AW2518HF has accurate but too high gamma, accurate but too blue color, and like most 240hz TN panels can not fully cover the SDR (HDTV/REC 709 & sRGB) color spaces (caps at 93%; over and under-saturates some colors).  Overall it has great image quality for a TN panel, low input lag and good overdrive, though PC Lab does not provide much information about the overdrive so I can not properly compare it to competitors until more detailed reviews come out.

Multiple Acer XF252QX BMIIPRZX, Gigabyte KD25F (the KD25F tested by tested by Tom's Hardware tested came with low/2.00 preset gamma) and LG 27GK750F reviews prove that they suffer from significant preset gamma, contrast (LG) and color accuracy variance, and may come with low gamma resulting in washed out colors and shades, and none can fully cover the SDR (HDTV/REC 709 & sRGB) color spaces.

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