Compare ASUS ROG Strix OLED XG27ACDNG vs LG 27GX790B-B

Up to 90W charging is a meaningful convenience for laptops and portable devices and a welcome addition to a fast gaming monitor.

The USB-C port supplies only 5W, far too little to charge most laptops adequately.

A standard power cable connects directly to the monitor, avoiding a separate external power brick and making cable replacement straightforward.

An external adapter adds another object to manage on or beneath the desk.

The semi-glossy finish keeps images crisp and colorful without the grain of heavy matte coatings, though it trades off some glare resistance.

The matte coating cuts reflections but looks less crisp and punchy than glossy rivals to some viewers; preferences are sharply divided.

Measured white and dark-field uniformity is impressively consistent, with little visible discoloration across the tested panels.

Findings differ: one tester saw mostly even color and brightness, while another sample had conspicuous gray-screen texture.

The 1440p resolution is more achievable at high frame rates than 4K, but taking full advantage of 360Hz still demands fast games and a suitably capable PC.

Even expensive gaming systems often fall well short of 540–720 fps in modern games, restricting the benefit of the highest modes.

QHD strikes a useful balance between visual detail and the frame rates needed for high-refresh gaming, but it cannot match native 4K sharpness.

Native 1440p looks good at 27 inches, but enabling 720Hz reduces the image to a very soft 720p; detail-focused buyers may want 4K.

The coating keeps some reflections under control but cannot entirely overcome direct light, and stronger illumination can raise black levels.

The matte surface is effective against ordinary reflections, although direct window glare can still overpower it.

The screen assembly looks and feels sturdy, but opinions split over the more ordinary plastic stand and its fit with the premium ROG aesthetic.

Slim bezels and restrained styling give the display an upscale front appearance, even though much of its housing is plastic.

Two HDMI 2.1 ports, DisplayPort, USB-C and multiple USB connections form a flexible setup for PCs, consoles and peripherals.

Two HDMI inputs, DisplayPort, USB-C, and USB-A provide welcome flexibility, although some would like another HDMI or easier physical access.

The 27-inch flat screen balances gaming immersion with a manageable amount of desk space, and its size is praised as practical for QHD pixel density.

The base occupies a moderate amount of desk space, and its screen can sit farther forward than expected.

Photoshop images appear detailed and richly colored, while calibration and sRGB options help make the display suitable for serious image work.

The colorful QHD panel can handle everyday photo edits, though color-critical work calls for carefully chosen presets.

Games and photos look crisp at QHD, and VividPixel can assist text; native 4K screens remain sharper for desktop fine detail.

Native 1440p delivers crisp graphics, but the optional 720p mode produces conspicuous softness.

Third-generation QD-OLED reduces colored outlines around letters, but fine text remains less clean than on a conventional LCD and sensitivity varies.

Experiences vary from crisp, perfectly usable fonts to visible fringing on dark text over light backgrounds, especially during prolonged office work.

Three USB-A ports and the upstream connections add useful peripheral access, especially alongside the KVM for a two-computer desk.

The built-in USB ports add convenience for peripherals alongside the display inputs.

Flicker can be visible during fluctuating frame rates in dark games or menus; the mitigation settings may narrow VRR's operating range and cause other compromises.

Flicker is a concern in variable-refresh use, though an OLED flicker mitigation control can help in some scenarios.

PS5 and Xbox can take advantage of HDMI 2.1, 120Hz and compatible VRR/HDR modes, though accepted 4K signals are displayed at native 1440p.

A PS5 Pro worked well in hands-on play, with smooth motion and appealing OLED visuals.

ASUS supplies extensive pixel cleaning, shifting and static-logo controls plus burn-in warranty coverage, but none removes the inherent risk of permanent marks.

Screen savers and OLED cleaning features offer useful precautions, but short tests cannot guarantee long-term protection from static-image wear.

High refresh, flexible video inputs and adaptive-sync support suit powerful PCs particularly well, with access to the monitor's full 360Hz speed.

High-bandwidth ports, variable refresh, and spectacular motion make it well suited to fast gaming PCs that can push high frame rates.

Truly deep blacks are a highlight in dark rooms, but ambient light can turn them grayish or purple on this QD-OLED panel.

OLED produces exceptionally deep blacks, making night scenes and highlights more convincing.

Racing mode receives praise for natural balance, while certain stylized presets look exaggerated or poorly calibrated without adjustment.

Genre presets and personalized adjustments make tuning easy; several modes look similar, and color fidelity varies between them.

Height, tilt, swivel and full portrait pivot are generous and generally smooth, although one assessment finds the maximum height merely average.

Height, tilt, swivel, and portrait rotation make it easy to set a comfortable position.

The stand feels solid during adjustments, with smooth travel and little reported looseness or wobble.

The weighted, flat metal base remains stable while the screen moves and can hold small desk items.

The broad QD-OLED gamut produces exceptionally vivid reds and rich colors, with sRGB clamping available when restraint matters more than saturation.

The wide color gamut gives games vivid, rich color; color purity is a frequent highlight of the newer Tandem OLED panel.

The illuminated rear logo gives the chassis a distinctive gamer look and offers customizable effects, but it is too subtle to meaningfully light up a wall.

Rear RGB is customizable and subdued enough not to dominate the desk.

OLED contrast and color make story-driven games striking, but 360Hz is often unnecessary and bright-scene HDR can be less compelling than higher-resolution alternatives.

Deep blacks, vivid colors, and bright HDR make cinematic games attractive, though glossy or higher-resolution alternatives may be more immersive for solo play.

The overall experience is strongly praised for fast, gorgeous gaming and abundant features, with lighting, HDR brightness and value providing the principal caveats.

A standout specialist for high-frame-rate PC gaming rather than a universally ideal monitor; image compromises and value depend heavily on how you play.

360Hz operation, near-instant response and low lag are excellent for shooters and esports when the PC can deliver high frame rates.

Serious esports players get exceptionally clear motion and responsive control, especially in lightweight shooters that can run at hundreds of frames per second.

Routing behind the stand is basic, and one hands-on setup found cables hanging visibly when the monitor was raised.

Some testers miss an opening through the stand, although one found the included rear clip effective for bundling cables.

The native 360Hz panel delivers wonderfully fluid motion, especially over 240fps; that advantage shrinks in slower games or on consoles.

Native 540Hz QHD feels extraordinarily fluid and crisp. The 720Hz option is less universally useful because it drops to 720p and demands extremely high frame rates.

Moving objects remain clean and well defined, with minimal smearing or overshoot even during rapid action.

Very fast OLED response keeps trailing and smearing minimal in rapid action.

Controls feel immediate, with measured low processing delay that makes the monitor highly responsive in fast games.

Fast responses and negligible perceived delay help games feel connected and snappy, including when frame rates are below the monitor’s peak.

Fast transitions and 360Hz make moving detail look unusually sharp and stable, with little visible smearing.

Fast-moving objects show remarkably little blur or trailing, helping target visibility and making rapid camera movement feel precise.

QD-OLED's self-emissive contrast, vivid color and responsiveness are central to the appeal, though brighter rooms can expose its characteristic raised blacks.

The newer Tandem OLED architecture delivers unusually bright, vibrant imagery while retaining fast OLED response.

The KVM, docking-friendly USB-C and strong color make light creative and desktop work feasible, despite the static-content tradeoff.

Good QHD clarity and easy setup suit general work for some users, but OLED text artifacts are noticeable for others.

Near-instant OLED transitions keep action crisp with exceptionally low blur and very little meaningful pixel-response delay.

Near-instant OLED pixel transitions keep fast motion clear and avoid the smearing associated with slower panels.

A three-year burn-in-inclusive warranty offers reassurance, but actual coverage and conditions depend on the buyer's region.

A two-year OLED warranty looks weak beside some competitors offering three years or more.

Feature-rich 360Hz OLED performance is appealing at a discount, while full-price comparisons with cheaper 240Hz panels and newer OLEDs require care.

At a steep discount, its 540Hz OLED performance compares favorably with pricier rivals; at full price, many gamers can spend far less without giving up much.

Full-bandwidth HDMI 2.1 connections are a genuine advantage for modern consoles and PCs, adding flexibility over some competing OLED monitors.

High-bandwidth HDMI ports support current gaming devices and offer flexibility alongside DisplayPort.

Stand parts snap or screw together quickly, and the included mounting adapter eases the move to a monitor arm.

Tool-light assembly and straightforward stand attachment make initial setup simple.

Uniform Brightness can tame distracting changes as windows or bright scenes change, though it reduces peak output. Several tests find the default behavior less intrusive than on rival QD-OLEDs.

Peak luminance can reduce after sustained output, making short highlights more impressive than prolonged bright scenes.

It stands out among several QD-OLED competitors in SDR and can deliver striking small HDR peaks, but broad bright HDR scenes remain comparatively dim.

The Tandem OLED reaches impressive HDR brightness for its class, although sustained brightness can fall and direct sunlight remains demanding.

Some tests find near-reference accuracy without calibration, while others recommend tuning specific modes for the best sRGB or HDR results.

The sRGB mode improves on older LG models, but standard gaming modes can appear oversaturated; calibration may be worthwhile.

Adaptive sync generally keeps games tear-free and responsive, although fluctuating frame rates can introduce OLED flicker and mitigation tradeoffs.

Smooth, tear-free play is reported in real-world testing, though there are some cautions about flicker with variable refresh.

Deep blacks and vivid QD-OLED color create dramatic HDR images, particularly in dark scenes; bright full-screen scenes and some tone-mapping choices are less convincing.

Bright highlights and perfect blacks create striking HDR games; some evaluations note inaccurate overbrightening and the matte finish softening the visual pop.

Its combination of deep blacks, bright accents and vivid color makes both SDR and HDR images exceptionally appealing.

Rich OLED colors, superb contrast, and sharp native QHD images make games look excellent. Some testers dislike the matte finish and uneven gray-screen texture.

The joystick-based menus offer lots of control and are generally easy to navigate; desktop software adds a more convenient alternative.

A compact joystick and straightforward menus make settings easy to find and change.

Pixel-level light control delivers exceptionally strong dark-scene contrast and convincing image depth without LCD-style backlight halos.

Excellent OLED contrast keeps dark areas black while bright highlights pop, especially in atmospheric games.

The screen housing and mechanical parts generally feel solid; some find the stand's plastic finish less premium than similarly priced rivals.

The flat metal stand adds substance, but the main chassis is ordinary plastic and not especially premium for the price.

The 27-inch format is comfortable for normal desk gaming, though some users want a larger, higher-resolution option.

The compact, thin-bezel 27-inch form fits common desktop setups without demanding an oversized desk.

A futuristic ROG rear shell and customizable lighting look distinctive, while the comparatively plain plastic stand divides opinion.

The minimalist silver-and-black design fits both gaming rooms and workspaces, with subdued rear lighting rather than excessive decoration.

True Black mode can track its target well, but higher-peak modes trade accuracy and brightness behavior, with occasional clipping or dimming complaints.

HDR can render scenes brighter than intended, so the panel’s luminous highlights do not always translate into the most accurate presentation.

Extensive gamut, gamma, color-temperature and saturation adjustments make the image highly configurable; the best presets differ according to the task.

The extensive color menus and personalized picture mode allow meaningful adjustment when stock presets look too saturated.

Controls and setup are broadly intuitive, with convenient adjustment once the menu layout is familiar.

Black-frame insertion sharpens motion at 120Hz or 180Hz, but the substantial brightness loss and inability to combine it with VRR or HDR limit its appeal.

Pixel-level OLED illumination keeps bright objects crisp against dark surroundings, without the glowing halos common to some backlit LCDs.

Switching between 540Hz QHD and 720Hz HD creates choice, but several testers found the softer 720p image too costly for the modest speed benefit.

Its OLED black-frame insertion can improve clarity at 120Hz and 180Hz; the loss of brightness, HDR and variable refresh makes it a niche alternative to normal 360Hz operation.

There is a substantial collection of crosshairs, frame counters, shadow enhancements and custom controls, with more tuning options than several competitors.

The 10-bit panel delivers fine tonal steps and smooth gradients that complement both gaming and creative work.

Small HDR lights pop against true black, while larger highlights can dim or roll off, depending on the mode and content.

Multiple HDR modes make it possible to prioritize peak highlights or a steadier image, but none is ideal for every brightness level.

Audio presets through the headset jack sound pleasing, with choices for different listening needs.

Static logos, taskbars and other fixed elements still present a risk of image retention or eventual burn-in, despite the monitor’s protective routines.

Sending it 4K for desktop use produces softer text than native QHD, so the higher accepted input resolution is not a substitute for a native 4K panel.

The package is generous, with multiple video and USB cables, cleaning supplies and a mounting adapter that make first setup easier.

A phone slot in the stand is surprisingly useful and can accommodate even some large handsets with cases.

1440p at 27 inches looks sharp in games and photographs, but text is not as finely defined as on higher-density 4K OLED displays.

The lighter plastic chassis makes moving or mounting the monitor easier.

It wakes or powers on promptly in hands-on use.

The integrated power supply uses a standard, easy-to-replace mains cable rather than a proprietary external adapter.

Changing certain HDR or flicker controls can unexpectedly exit HDR and require re-enabling it in the game, a frustrating setup quirk.

Fine shadow nuances remain visible alongside bright accents, taking advantage of OLED's pixel-by-pixel light control.

A top-mounted threaded socket is convenient for placing a compatible microphone, camera or light above the display.

The rear-facing connectors are handy for some setups but require turning the display around in others.

A supplied VESA adapter and standard 100×100mm support make monitor arms and wall mounting straightforward.

Colors and contrast hold up impressively from off-center positions, giving a forgiving viewing sweet spot.

FreeSync, G-SYNC Compatible and HDMI VRR give good support across modern hardware, though some settings require care to avoid disabling the feature.

Adjustable Shadow Boost can expose dark gameplay details without excessively washing out highlights.

Switching between refresh profiles worked smoothly in one test, but automatic switching between devices was less dependable.

DisplayPort 2.1 is a useful match for powerful PCs trying to get the most from the panel’s demanding refresh rates.

An optional smaller-screen competitive view is available, but its practical value is limited for players who prefer the full QHD image.

The integrated KVM is a practical benefit for using one keyboard and mouse with a desktop and laptop, even if initial configuration is needed.

Individual OLED pixels eliminate the zone-transition and halo artifacts associated with conventional local-dimming backlights.

Viewing more than one source is useful, though some accounts distinguish between available picture-in-picture and missing side-by-side options.

Headphone processing and sound presets are well liked in one hands-on assessment.

Flicker-free and low-blue-light options offer flexibility, while OLED anti-flicker settings can help some situations at the expense of VRR behavior.

Thin top and side borders make the monitor look tidy and help it sit neatly next to a second display.

Some measurements show impressively accurate gamma in the right preset, while others find noticeable errors in several alternative modes.

Unusually extensive HDR menus let owners adjust brightness, contrast and color rather than accepting a locked preset; tweaking can alter accuracy.

DisplayWidget offers a convenient desktop interface for settings and shortcuts, making frequent picture adjustments easier than joystick-only navigation.