Compare LG 27GX790A-B vs Samsung Odyssey OLED G81SF S27FG810S

The 24-inch emulation mode can look blurry or incorrectly mapped, making native full-screen 1440p the more reliable choice.

Lower-than-4K material generally scales cleanly and can be sharpened to taste. Pre-480p sources are a notable exception.

Updates can improve some display behavior, but reported screen-splitting and connection glitches were not fully resolved for every user.

Firmware can be updated easily from a USB drive through the monitor menu, without needing a PC connection. The process was quick and uncomplicated.

Dark gradient steps and gray banding can be visible, especially near black; refresh routines or firmware adjustments may reduce the problem without guaranteeing its removal.

Color shifts appear natural and fluid rather than harshly banded. Subtle gradations complement the screen’s wide color range.

Deep black is a strength, but some dark-gray detail can disappear or look too elevated depending on the selected mode and firmware.

Fine gradations in dark scenes remain visible without lifting black levels excessively. This adds depth to atmospheric gameplay.

Rear-facing connections are relatively easy to reach, while the nearby headphone jack and straightforward layout simplify peripheral changes.

Some rear ports are awkward to reach around the stand neck. Cable changes can be less convenient than the specification suggests.

Game visuals look clean at QHD, but some desktop fonts and interface elements appear softer or more pixelated than on a 4K screen.

Games and photos look strikingly crisp at native 4K. The matte coating and some text-scaling preferences can make white desktop elements look softer to sensitive eyes.

The stand includes a useful pass-through and accessible connections, though one low-positioned route can leave visible cables.

The rear strap keeps basic wiring together, but it is not a full cable-hiding solution. Wall-flush desks can still expose a cluster of cables.

Native 1440p strikes a useful balance for extremely high frame rates and looks pleasing in games. It lacks the extra sharpness of competing 27-inch 4K OLEDs.

Packing 4K into 27 inches produces fine gaming detail, crisp graphics and a sharp desktop. It takes a powerful GPU to combine that resolution with very high frame rates.

Small fonts can have colored edges or a hazy outline because of the WOLED subpixel pattern and matte coating, reducing its appeal for heavy reading.

Fine pixel density minimizes visible OLED text artifacts for some, but others notice colored edges on small high-contrast text. Matte diffusion adds another sensitivity-dependent variable.

The matte coating diffuses glare effectively under many lights, although direct windows and edge-spread reflections remain distracting for some.

The matte finish effectively diffuses window and lamp reflections rather than producing mirror-like glare. That advantage comes with some extra perceived grain or haze.

Two USB-A ports are handy for a mouse and keyboard, but the limited hub and missing USB-C do not replace a fuller workstation dock.

The USB-A connections provide practical peripheral access, including useful powered-port scenarios. They are welcome but do not replace a laptop dock.

The broad metal base stays low and leaves usable space above it for desk accessories, though its footprint and bulk will not suit every layout.

A slim screen and relatively flat, tidy stand work well on standard desks. The 27-inch format avoids the bulk of larger gaming monitors.

QHD at 27 inches is sharp enough for many games, but 4K displays deliver visibly finer details, particularly with tiny interface text.

At around 166 pixels per inch, tiny details, text and textures look unusually well defined for a gaming monitor. The close-packed pixels are a major benefit over similarly sized 1440p screens.

The screen handles basic work, but small-font clarity and gray-uniformity drawbacks make it less versatile than sharper office-oriented alternatives.

The sharp panel is pleasant for general tasks, but competing displays with KVM and USB-C are easier to integrate into a work-first desk.

PS5 and Xbox work with modern HDMI signals and enjoy OLED contrast, but they cannot exploit 480Hz and a few lower-refresh quirks remain.

4K, HDR, VRR and strong 120Hz responsiveness make modern consoles look excellent. The 240Hz maximum is largely unused, and separate audio is needed.

The matte finish controls mirror-like reflections with little obvious grain for some, but others prefer a glossy surface for maximum crispness.

The coating divides opinion: reflections are greatly subdued, but light backgrounds can look grainy or slightly diffused. Glossy alternatives have a cleaner appearance in controlled lighting.

Pixel movement, a screen saver, cleaning functions and standby behavior help manage OLED wear, but prolonged static interfaces still require care.

Cooling and static-element dimming are thoughtful OLED-care features and do not interrupt normal gaming often. They reduce risk rather than guarantee permanent immunity.

The panel displays richly saturated colors and substantial DCI-P3 coverage, even if QD-OLED alternatives reach a little farther into wide-gamut spaces.

Vivid, wide-gamut colors are among the monitor’s best qualities, making games and creative visuals look lively. Saturation is especially impressive in colorful HDR scenes.

Crosshairs, a frame-rate counter, and shadow-enhancing controls are useful, but specialty tools such as timers are missing and the 24-inch emulation disappoints.

Core gaming tools are present, but the extras feel sparse compared with some rivals. The display prioritizes picture quality over convenience features.

Controls feel exceptionally immediate at high refresh rates, though older firmware and some 60Hz situations have drawn complaints.

Controls feel immediate, with particularly low lag at high refresh rates and strong responsiveness even at 60Hz and 120Hz. That helps both PC and console play.

Constant-brightness operation and adjustable color controls help with Photoshop-style work, though high-resolution alternatives remain appealing for detail work.

Detailed 4K images and rich QD-OLED color work well for graphics and photo editing. Exact tonal decisions may call for careful calibration and coating preference.

The standard 100×100mm mount supports alternate stands or arms if the included base is not a good fit.

Compatible monitor arms offer more positioning options and free up desk space. The standard mount complements the adjustable stand.

Official FreeSync and G-SYNC support gives AMD and Nvidia owners flexible, tear-reducing operation; the separate flicker issue remains a caveat.

Adaptive refresh supports smooth PC and console play across variable frame rates. It is particularly useful when a game cannot hold a steady 240fps.

Deep OLED blacks, rich colors and vivid effects make immersive games a pleasure, though full-screen brightness trails newer panels.

OLED blacks, vivid color and sharp 4K details make story-driven and atmospheric games immersive. High graphical settings will still challenge the fastest PCs.

There is no USB-C charging output, so handhelds and laptops need their own power connection.

The missing USB-C video and charging connection is an important omission for laptop users. A modern one-cable setup is not possible directly from this screen.

Height, tilt, swivel and portrait pivot are handled smoothly and precisely, making it easy to tailor the panel position.

Height, tilt, swivel and portrait rotation provide welcome flexibility. One owner found the movement stiff, but generally the support is stable and versatile.

Two HDMI 2.1 sockets, DisplayPort 2.1 and a modest USB hub cover gaming essentials, but the lack of USB-C is conspicuous.

HDMI 2.1, DisplayPort and a USB-A hub cover core gaming needs, but there is no USB-C or KVM. A few prefer newer DisplayPort bandwidth at this price.

There are no integrated speakers, leaving users to rely on a headset, desktop speakers or the headphone output.

There are no onboard speakers, so even simple notification sounds require headphones, a soundbar or external speakers. This can be frustrating at the price.

Pinpoint highlights are vivid, and bright objects generally retain convincing texture; the panel cannot sustain the same punch across large bright areas.

Small bright objects stand out sharply against dark surroundings, adding depth and sparkle. Overall HDR intensity is constrained in very bright scenes.

Metal stand components, a slim frame and neat styling give the display an expensive, carefully built feel.

Metallic silver finishes, tidy lines and restrained details help the screen feel expensive. The stand and housing stand out against plainer plastic alternatives.

Frame-rate swings can produce pronounced brightness flicker, most conspicuously in dark scenes, so stable frame caps or fixed refresh may be preferable.

Uneven frame pacing can trigger distracting brightness flicker in dark scenes with VRR Control disabled. The mitigation setting may help, though it is not guaranteed to cure every game.

Individually controlled OLED pixels deliver convincing, nearly ink-black shadows and an immersive dark-scene image.

Deep, near-perfect blacks bring dark scenes to life when ambient light is controlled. In brighter spaces, the QD-OLED panel can make those blacks look purple or raised.

The fast, colorful OLED gaming experience wins strong praise, but this specialized screen leaves value-focused and productivity-first buyers with better options.

A striking gaming display whose picture quality and responsiveness win strong praise. The high hardware demands, premium cost and missing convenience extras stop it from being an automatic pick.

The hexagonal rear lighting adds restrained gaming flair, though its brightness and customization may feel limited next to showier setups.

The rear light ring adds a customizable, softly glowing backdrop for gaming. It is most visible near a wall in a dim room and may seem subtle elsewhere.

With suitable hardware, the monitor combines native 1440p with extraordinary speed and broad sync support. Its biggest advantages live in fast PC titles.

A powerful gaming PC can take full advantage of the sharp 4K image, fluid refresh and low-latency response. Less capable systems may be better matched to a cheaper 1440p OLED.

The solid, low-profile metal base keeps the panel steady while allowing repositioning, with only minor complaints about size or shape.

The slim base is reassuringly firm and keeps the panel steady. Some resistance in the adjustment mechanism may even help prevent accidental movement.

Extremely rapid pixel transitions keep edges crisp even through frantic camera movement, supporting the monitor’s esports strengths.

The rapid OLED pixel transitions preserve detail during quick camera movement and high-speed action. It is a standout strength across gaming modes.

A native 480Hz refresh makes motion dramatically smooth and is its clearest reason to buy, provided the PC can render enough frames.

The 240Hz ceiling makes fast PC gaming beautifully fluid, with ample room for esports frame rates. The benefit is less substantial when demanding 4K games run far below 240fps.

This is a standout fit for serious esports players who can drive 1440p at very high frame rates: targets stay crisp and controls feel immediate.

Quick pixel response, low input lag and a 240Hz ceiling make it excellent for fast shooters and esports. Players prioritizing the very highest frame rates may prefer a lower-resolution, faster screen.

Almost blur-free 480Hz motion is the defining attraction, keeping fast-moving targets and small details clear in competitive games.

Fast movement stays exceptionally clean, with little blur or smearing. Even lower frame rates can feel responsive thanks to the OLED panel.

Reaching the full 480Hz benefit calls for unusually high, steady frame rates and a powerful PC. Lesser rigs still run smoothly but leave much of the panel untapped.

4K at 240fps is a demanding target even for powerful graphics cards. Much of the monitor’s headroom can go unused on midrange systems or in maximum-detail AAA games.

There is a generous selection of picture modes and game-oriented overlays; some HDR simulation and gamma choices need tuning.

Game and picture modes provide plenty of quick looks and fine-tuning choices. A few settings can produce unnatural color or require adjustment.

The package includes useful HDMI, DisplayPort, and USB cables, reducing the need for extra setup purchases.

HDMI and DisplayPort cables, power hardware and the stand make initial setup convenient. The included connections cover a typical desktop gaming arrangement.

WOLED provides near-instant pixel response and perfect blacks, while its subpixel arrangement and older-generation brightness impose tradeoffs.

QD-OLED delivers superb blacks, intense colors and extremely fast motion, giving the display much of its appeal. Its light sensitivity and OLED maintenance needs are real tradeoffs.

Colors and contrast remain strong from off-axis seating, especially when compared with some newer WOLED alternatives.

Colors and contrast remain strong from wide angles, without the obvious washout of many LCDs. That makes the image dependable off-axis.

The older panel is praised for preserving intended HDR brightness more faithfully than some newer modes, though peak settings can still compress highlights.

Some scenes look spectacular, but dynamic processing can change brightness too aggressively or leave other parts too dark. Manual settings may produce a more consistent image.

HDR picture modes retain useful brightness and color-temperature settings, allowing substantial adjustment rather than locking the entire image.

There is plenty of control over brightness, tone mapping and color, allowing users to refine the image. The number of interactions needed to find a satisfying HDR mode can be a nuisance.

Adjustable white balance, gamma, gamut, and even hardware calibration offer unusually flexible fine-tuning. A colorimeter is useful if color precision is a priority.

Granular color and white-balance settings make it possible to tune the picture to taste. They offer useful flexibility beyond the defaults.

OLED wear and sporadic display glitches make long-term care and firmware stability more consequential than on a typical LCD.

Short-term operation was trouble-free without burn-in or other issues. Longer ownership still depends on static-content habits and OLED care.

Two HDMI 2.1 inputs are a good match for game consoles and additional devices, adding welcome flexibility to a PC-focused display.

The HDMI connections are well suited to 4K/120Hz consoles and high-refresh PC sources. Multiple ports simplify switching gaming devices.

The monitor looks strongest on sale: its unique 480Hz speed can justify the premium for enthusiasts, but regular prices invite faster or sharper rivals.

Exceptional visuals and speed justify a premium for the right gamer, but the original high price competes poorly with similarly capable rivals. Sale pricing makes it markedly more attractive.

Basic assembly and connections are straightforward, with the panel clipping onto a stable stand and useful cables included.

Assembly is quick and generally straightforward, with simple click-and-twist fittings. The mechanism can take a moment to figure out the first time.

Rich hues stand out beautifully against OLED blacks, although bright saturated colors are not as intense as on some QD-OLED or newer tandem-OLED panels.

Quantum-dot color looks impressively saturated and luminous, especially in vibrant game environments. Intense hues remain a major visual attraction.

Color can look excellent once calibrated, but out-of-box white balance and gamma results vary sharply between tests and modes.

Colors generally look pleasing and capable of supporting creative work. Some tuning and preset choices can matter when precision is more important than impact.

The internal cooling arrangement is described as very quiet, with no distracting fan noise in normal use.

The fanless approach is effectively silent during use, avoiding a common concern with complex gaming displays. It preserves immersion during quiet scenes.

DisplayPort 2.1 is a welcome gaming connection, but UHBR13.5 bandwidth still requires compression for 1440p at 480Hz, and occasional handshake problems have been reported.

DisplayPort 1.4 with compression can carry the full 4K/240Hz image, but some buyers expect DisplayPort 2.1 in this price range. Actual picture clarity is not a major complaint.

Some accounts describe a two-tone split image after waking or applying calibration, along with occasional connection handshakes. Changing modes may temporarily restore the image.

One test encountered several seconds of black screen when changing between games with different demands. It can be jarring even though gameplay picture quality is excellent.

The joystick menu is generally quick and easy to navigate, although a remote or more direct controls would suit some people better.

The simple menu is responsive and straightforward for some, but the rear control is awkwardly located and disliked by others. Controls are more divisive than the picture.

Shadow-lifting adjustments can uncover hidden details in darker games and partly offset occasional near-black crushing.

Adjusting shadow lift can expose opponents in dark areas without increasing overall brightness. It takes experimentation to balance visibility against accuracy.

There is no built-in KVM, limiting convenience for people who want a single keyboard and mouse to follow multiple computers.

There is no integrated KVM to share one keyboard and mouse between computers. That is especially disappointing for multi-device workstations at this price.

Vivid colors, exceptional contrast and striking HDR detail make games look fantastic; uneven dark grays and modest resolution temper the result.

The 4K QD-OLED image looks intensely detailed, colorful and contrast-rich, particularly in games. Matte haze and a few HDR brightness tradeoffs can temper the effect.

Brightness is generally adequate for a gaming room and HDR highlights stand out, but sunny offices and the newest OLED rivals reveal its limitations.

Highlights can look vivid, and many find everyday SDR brightness sufficient. Sustained bright HDR scenes fall short of brighter LCD or mini-LED options.

Broad FreeSync and G-SYNC support is a plus for fluid gaming, although VRR flicker and occasional mode instability complicate the experience.

FreeSync and VRR help keep action smooth when frame rates fluctuate. Some setups may require tweaking VRR Control because flicker can be noticeable.

HDR is especially captivating when bright effects appear against deep black surroundings. Some comparisons favor newer OLEDs for sustained brightness, but the older panel can track intended HDR tones more faithfully.

Bright accents against OLED blacks make cinematic HDR compelling, especially in darker rooms. Peak-brightness limits and finicky tone mapping keep bright scenes from being equally spectacular.

Per-pixel OLED lighting gives almost bottomless contrast, especially effective when small bright objects appear in dark scenes.

Pixel-level lighting creates dramatic separation between bright highlights and truly dark areas, without LCD-style halos. Games gain a strong sense of depth.

Very slim borders give the panel a clean, nearly floating appearance, even though a reflective strip below the screen may catch light.

The thin-edged screen looks modern, though the silver trim can be more noticeable in a bright room than dark bezels. It is mostly a preference issue.

Low-blue-light treatment and adjustable brightness help some users, but others report tired eyes or discomfort during extended use.

Eye-saver and flicker-reduction settings are welcome options for longer sessions. They complement the glare-reducing finish.

A thin panel, narrow bezels and restrained dark styling look polished, with minor complaints about reflective trim and the stand.

The sleek metal look and nearly frameless panel are a strong visual draw. Lighting accents add a subtle gaming touch without dominating the design.

The 27-inch footprint suits many competitive setups, but some prefer a smaller tournament-style screen or a larger cinematic display.

The 27-inch format packs remarkable detail into a desk-friendly footprint. Some prefer the larger 32-inch version for greater immersion.

The panel and metal stand feel sturdy, with precise moving parts and a solid construction that matches its premium positioning.

The thin metallic housing and sturdy stand give this monitor a solid, upscale construction. Its slimness does not undermine the overall feeling of quality.

The menu and day-to-day controls are approachable, although extracting peak performance and handling OLED care may be demanding.

The smaller simulated play area is a poor substitute for a native 24-inch screen: it looks blurry and its pixel mapping is unconvincing.

Multiple virtual aim points can help shooters with difficult aiming situations. The feature is a useful extra rather than a reason to buy by itself.

The familiar 16:9 proportions work naturally with the 27-inch QHD size and fit the preferred desktop layout.

Pixel-level OLED lighting avoids the unwanted edge glow seen on some LCDs. Dark areas stay convincingly dark.

LG omits black-frame insertion, leaving more persistence blur at lower refresh rates than rivals with dedicated motion-blur reduction.

There is no built-in BFI mode, but an external scaler can enable effective low-frame-rate clarity enhancements. That workaround adds complexity and can cost brightness.

Individual OLED pixels keep highlights from spilling light into neighboring dark areas. Subtitles, stars and high-contrast scenes stay clean.

Rich billion-color reproduction gives pictures smooth, natural transitions and bold hues. It supports the monitor’s expressive visual quality.

There is no 4K/1080p dual-resolution switch; the panel stays focused on native 1440p esports gaming rather than covering two distinct gaming modes.

Crosshairs and frame-rate overlays are present, but the omission of timers disappoints users expecting a fuller set of esports aids.

The fast OLED panel leaves little visible trailing or smearing, with minor overshoot seen in tests but generally hard to spot in play.

The headphone jack provides a simple way to route audio through external equipment. It can also help create a tidy soundbar arrangement.

The four-pole headset output is convenient, and DTS processing can add impressive depth and bass without external speakers.

Samsung’s thermal system draws praise for running cool without noisy fans or intrusive maintenance. It is a distinctive strength of the design.

OLED retention and burn-in remain considerations for long sessions with static heads-up displays, despite onboard protection tools.

High-refresh OLED motion is impressively clean, and external BFI can make 60Hz content clearer still. It remains a specialized workaround.

The box is easy to navigate, making the monitor and included parts straightforward to unpack. Initial setup feels approachable.

OLED-care routines did not interrupt normal gaming during extended hands-on use. That keeps upkeep from becoming a regular annoyance.

A clean, defect-free review sample gives a good first impression of the display. Buyers should still inspect their individual panel.

The inspected unit arrived with no dead pixels or visible defects. That is reassuring for its initial condition, not a guarantee for every unit.

The slim, relatively light chassis is easier to reposition than its premium metal look suggests. This matters most if the monitor is moved regularly.

Lower brightness settings can reduce eye strain and power bills, although efficiency is not the main appeal. High refresh and vivid OLED performance remain the priority.

The high-resolution panel and fast 120Hz-class response suit PlayStation gaming well. It lacks a few TV-oriented conveniences, including built-in audio.

The lack of a remote frustrates those accustomed to other Samsung monitors. Basic settings must be handled from the rear joystick.

Noticeable gray streaks, dirty-screen effects and dark-scene banding appear on some units, even after cleaning cycles.

The special ultrawide view expands the horizontal perspective but puts black bars above and below. A real ultrawide screen is preferable for frequent widescreen play.

Movie image quality is strong, but certain 24Hz or 50Hz disc outputs from consoles are not accepted. A separate player may be needed for native-rate discs.

Low lag can make 60fps games surprisingly responsive, including console titles. This does not imply all older signal formats are compatible.

A traditional monitor interface replaces Samsung’s TV-style apps and remote. That simplifies PC settings but removes built-in streaming conveniences.

LG’s Windows utility is usable rather than elegant, and firmware changes have delivered both picture improvements and unresolved glitches.

Three DTS headphone modes provide distinct sound presentations, adding welcome flexibility for gaming and entertainment.

Constant-brightness modes keep desktop luminance steady, while variable modes add extra pop for games and video. A higher peak setting can make brightness changes more obvious.

Compression over the available ports is described as visually transparent, with little visible difference between HDMI and DisplayPort. It enables high refresh without noticeable image loss.

Each OLED pixel independently controls light, keeping bright details sharply separated from dark ones. The result is effectively halo-free contrast.

Picture-in-picture is useful for checking a second source while keeping the main image large. It cannot replace full side-by-side layouts and can feel cramped on 27 inches.

DTS Headphone:X adds useful directional cues and fuller sound through headphones, making it a worthwhile extra for headset users.

Some measurements are very accurate while others find bright midtones, crushed shadows or awkward preset behavior. Calibration and firmware can make a substantial difference.

Warranty duration and burn-in terms are a recurring source of caution, particularly alongside longer rival guarantees and third-party sellers.