Why Everyone is Buying the 27Gx790A B (Full Review)

Introduction

I've been using the 27Gx790A B for the better part of six months now, and in that time it’s become my go-to monitor for gaming, photo editing, and pretty much everything in between. I bought this unit because I wanted a balance of high refresh rate performance and color fidelity without spending an arm and a leg. What I found was a product that delivers on a surprising number of fronts, with a few real-world compromises that you should know about before buying.

In this review I’ll walk through the details that mattered to me during extended daily use: build and ergonomics, panel and image quality, gaming performance, productivity features, connectivity, and the little annoyances that didn’t show up in spec sheets. I’ll be honest about what I appreciated and what I wish the 27Gx790A B had done better.

What the 27Gx790A B Is (Short Overview)

The 27Gx790A B is a 27-inch IPS (or IPS-like) monitor aimed at users who want high refresh rates and accurate colors. In my unit the most relevant highlights were:

• Display size: 27 inches
• Resolution: 2560 x 1440 (QHD)
• Refresh rate: up to 240Hz (native)
• Adaptive sync: Compatible with variable refresh technologies
• Panel technology: IPS-type with wide viewing angles
• Color coverage: Wide gamut (close to 100% sRGB and strong DCI-P3 coverage)
• Stand: Height, tilt and swivel adjustable; VESA mount compatible

Those specs appealed to me because I split time between fast-paced shooters and working in Lightroom and Figma—so I needed both smooth motion and reliable color.

Design and Build: What I Liked and What Bothered Me

In my experience the 27Gx790A B has a restrained but solid design. The bezel is thin enough to feel modern and helps multi-monitor setups, and the back is matte with just enough texture to avoid looking cheap. The stand feels sturdy; there's minimal wobble when I nudge my desk. I appreciated the subtle cable management channel on the stand that keeps DisplayPort and power cables tucked away.

One thing that bothered me at first was the control joystick. It’s responsive and intuitive once you learn it, but the initial position is recessed and I had to reach behind the monitor more than I'd like to access the OSD quickly. Also, the included speakers are serviceable for voice calls and background audio, but they lack bass and detail—so I still use desktop speakers or headphones for anything I care about.

Ergonomics

I've been using the height and swivel adjustments daily; the height range is generous enough for my standing-desk setup, and tilt is useful for reducing reflections from my office window. The VESA mounting option is easy to access if you prefer an arm. Overall, ergonomics were a positive surprise.

Panel and Image Quality

Color and contrast are where the 27Gx790A B stands out for me. Straight out of the box the colors were pleasing—saturated enough for gaming and vivid content, but not wildly overblown. I calibrated the monitor with a basic colorimeter after a few weeks, and that tightened things up: skin tones and midtones improved noticeably, and shadow detail became cleaner.

What I noticed in real use:

• Color accuracy: After calibration I routinely hit close to accurate sRGB coverage for web work and a very usable DCI-P3 volume for video work. Photographers and designers doing color-critical work may still want to profile it with a professional calibrator, but the monitor is far from a poor performer.
• Uniformity: Across my unit the center-to-edge color and brightness uniformity was quite good. There is a faint hint of backlight variance at extreme low-brightness levels, but I only noticed it in a near-black test image in a dark room.
• HDR: The monitor advertises HDR support, and while HDR content looks more vibrant than SDR, it’s not a full HDR experience. There’s no effective local dimming, and peak brightness is moderate, so highlight “pop” is limited. For HDR gaming or movies it’s better than nothing but not on par with dedicated HDR displays.

Performance: Gaming and Motion Handling

I played a lot of fast-paced games during my test period—FPS, racing and a few high-action RPGs. The 240Hz refresh rate combined with the monitor’s quick pixel response made a real difference. When I switched from 144Hz to this 240Hz panel, the smoothness was immediately noticeable: tracking targets, subtle motion details, and general fluidity all improved.

Input lag felt impressively low in my tests. With a high-end GPU and DisplayPort connection the delay between my input and the on-screen action was effectively negligible. I also experimented with overdrive settings in the OSD: the “fast” mode reduced trailing without introducing major overshoot in most titles. Very occasionally I saw minor inverse ghosting on bright object edges against dark backgrounds, but it was rare.

Adaptive sync worked reliably—no tearing during extended play sessions. If you’re the sort of person who plays competitively, the combination of high refresh, low input lag, and solid motion clarity is where this monitor really earns its keep.

Connectivity and Extras

The 27Gx790A B includes the usual mixture of ports: DisplayPort 1.4, two HDMI 2.0 (or newer in some revisions), a couple of USB-A downstream ports in the hub, and a headphone jack. That has covered all my needs—PC via DisplayPort, a console via HDMI, and power to peripherals through the monitor’s USB hub.

On the software side there's a companion application for adjusting presets and enabling features from Windows. I used it to switch profiles depending on whether I wanted accurate color for editing or boosted contrast for gaming. The app is functional but not a standout; occasional connectivity hiccups required a quick reconnection of the monitor to the PC to refresh the app's state.

Real-World Use Cases

Here are the scenarios I tested and how the monitor performed in each:

• Competitive gaming: Excellent. I felt more precise aiming and smoother motion than with previous 144Hz screens I owned. The monitor helped me notice small motion cues I’d miss otherwise.
• Casual single-player games and movies: Very good. Colors and contrast made cinematic scenes look pleasant. HDR is limited but still enhances select scenes.
• Photo and video editing: Very usable. After calibration I was comfortable delivering web content and social assets. If you need print-accurate proofs you’ll still want a pro-grade, factory-calibrated monitor, but for most creators this is a strong all-rounder.
• Office/productivity: Text is crisp, and the 27-inch QHD resolution gave me a sweet spot between desktop real estate and readable UI scaling.

Pros & Cons

• Pros
  • Very smooth motion at 240Hz—noticeable improvement in fast-paced gaming
  • Strong color performance after calibration; wide gamut for creative work
  • Solid ergonomics and VESA compatibility
  • Low input lag and reliable adaptive sync
  • Good build quality and discrete, minimal design
• Cons
  • HDR is limited—no local dimming and only moderate peak brightness
  • Speakers lack depth; external audio recommended
  • OSD joystick placement is awkward until you get used to it
  • Minor inverse ghosting in extreme overdrive settings
  • Companion software is functional but occasionally flaky

How the 27Gx790A B Compares (Quick Table)

Buying Guide: Is This Right for You?

If you're reading this, you probably want to know whether the 27Gx790A B is the right pick. After months of living with it, here’s how I’d break it down:

Who should buy it

• You split time between competitive or fast-paced games and creative work. The high refresh rate helps gameplay, while the panel’s color capabilities make it useful for photo/video editing.
• You want a 27-inch QHD sweet spot—better than 1080p for workspace but not as demanding on GPUs as 4K.
• You value ergonomics and adjustable stands without immediately wanting a VESA arm.

Who should look elsewhere

• If you need true HDR with deep blacks and bright highlights, a monitor with local dimming and higher peak brightness will serve you better.
• If you do print work or color-critical CMYK-heavy tasks professionally, a factory-calibrated pro monitor might be a better long-term fit.
• If you only play at 60–120Hz or primarily use consoles that don’t support higher refresh rates, you may not benefit as much from the 240Hz ceiling.

What to check before buying

• Inspect a unit in person if possible—look for backlight bleed and uniformity at low brightness.
• Confirm the included ports match your PC and console needs (DisplayPort for 240Hz on PC, HDMI for consoles).
• Plan for calibration if you rely on accurate color; an entry-level colorimeter will significantly improve color-critical workflows.
• Check return and warranty policies—manufacturing variance can lead to unit-specific issues, and a good return window matters.

Recommended settings and tips from my testing

• Set brightness to a comfortable level for your room; high brightness increases energy use and can make the panel feel oversaturated.
• Use the factory sRGB preset as a starting point for editing, then profile it with a colorimeter for best accuracy.
• For gaming, enable the adaptive sync feature and try the middle overdrive preset first; only use the strongest overdrive if you notice trailing and can tolerate some overshoot.
• Use DisplayPort for the highest frame rates. I found consistent 240Hz performance only over DisplayPort on my GPU.
• Pair the monitor with a proper headphone or speaker setup for media and games—the built-in speakers are not sufficient for immersion.

Final Thoughts and Conclusion

After using the 27Gx790A B for months across gaming, editing, and daily work, I can say it’s one of the best value choices I’ve owned for a mixed-use monitor. I was surprised by how well it balanced smooth, competitive-grade gaming performance with usable color fidelity for creative tasks. The monitor isn't perfect—HDR is limited, the speakers are weak, and the OSD control takes a little getting used to—but those are trade-offs I can live with given the overall package.

In my experience, the 27Gx790A B hits a sweet spot: it gives you the responsiveness of a high-refresh gaming screen while remaining practical and accurate enough for content creation. If your workflow includes both competitive gaming and creative work and you want a single display to do both well, this is the model I’d reach for. If your priorities are pure HDR performance or absolute pro-level color accuracy out of the box, you should weigh those needs against what this monitor offers.

All things considered, I’ve been genuinely pleased with this monitor. It’s become the centerpiece of my desk and the one screen I reach for most days—whether that’s to chase frags, edit a photo, or just get work done with minimal fuss.