The LG OLED77G54LW is the UK 77-inch version of LG’s 2025 G5 OLED evo Gallery Series. In plain English, it is the big-screen model in LG’s flagship non-wireless OLED family: not the cable-light M5, not the more mainstream C5, but the elegant wall-first set aimed at people who want OLED’s inky blacks, a brighter new-generation panel, proper HDMI 2.1 gaming support and a cleaner living-room installation.

I’ve always had a soft spot for LG’s Gallery OLEDs because they understand something many premium TVs still forget: once a screen gets to 77 inches, it is not just an appliance. It becomes part of the room. The OLED77G54LW leans into that with a slim 24.8mm profile, a Satin Silver / Metallic finish and an included flush-fit scissor wall bracket. It is also very much a modern performance TV, with a 4K OLED evo panel, LG’s α11 AI Processor Gen2, Dolby Vision, HDR10, HLG, a native 120Hz refresh rate, and VRR support up to 165Hz for game and PC inputs.

This is not a budget-friendly “good enough” OLED. It is a premium large-screen set for people who care about films, sport, console gaming and a tidy installation. It also asks you to think about practicalities: at 1712 × 982 × 24.8mm without a stand and 33.6kg before you add any packaging, this is a two-person installation at the very least. The stand is sold separately, so the best version of this TV is almost certainly the one LG intended: flush-mounted on a properly prepared wall.

1. Key specifications: what the LG OLED77G54LW brings to the table

Rear panel view showing the G5 OLED's slim build and connection layout.

The headline upgrade for the 77-inch G5 is its OLED evo panel based on LG’s newer 4-stack Primary RGB Tandem WOLED technology. LG moved away from microlens-based MLA for its 2025 G5 and M5 lines, and the 55-, 65-, 77- and 83-inch G5 sizes use this newer panel approach. The 77-inch model is therefore right in the sweet spot of the range: large enough to feel cinematic, but still using the key panel technology that defines the G5 family.

The rest of the specification reads like a checklist for a high-end living-room TV. You get 4K UHD resolution at 3,840 × 2,160, a native 120Hz refresh rate, VRR up to 165Hz on game and PC inputs, Dolby Vision up to 144Hz, and four full-bandwidth 48Gbps HDMI 2.1 ports. That last part matters. Some premium TVs still make you juggle which devices get the “best” HDMI ports. With this LG, you can connect multiple current-generation consoles, a gaming PC and an eARC sound system without the same level of compromise.

The 77-inch G5 is a large but remarkably slim OLED, measuring 1712 × 982 × 24.8mm without a stand.

For HDR, the OLED77G54LW supports HDR10, Dolby Vision and HLG. It also includes Filmmaker Mode with Ambient Light Compensation, which is exactly the kind of feature I like to see on a TV aimed at film fans. Filmmaker Mode is about preserving the intent of the content, whilst ambient light compensation helps make that approach more practical in a normal British living room, where viewing conditions can shift dramatically between a grey afternoon and a lights-off film night.

On the certification side, LG’s G5 carries 100% Colour Volume for DCI-P3, 100% Colour Fidelity measured to CIE DE2000, plus UL Perfect Black and UL Perfect Color credentials. Gaming motion credentials are also strong, with ClearMR 10000 certification for the 77-inch size and a 0.1ms grey-to-grey response time certified by Intertek. Those figures do not tell the entire story of a TV’s image quality, of course, but they do show the G5 is built on a serious technical foundation.

2. Design and installation: the Gallery idea still makes sense

The Gallery Series design is built around a flush wall-mounted look.

The LG OLED77G54LW is not designed to be casually plonked onto a TV bench. Yes, you can use a stand, but it is sold separately. In the box, the important accessory is the included flush-fit scissor wall bracket. That tells you everything about the product’s intent. This is a Gallery Series OLED first and foremost, made to sit close to the wall and look less like a traditional television and more like a large framed display.

The dimensions are genuinely impressive for a 77-inch screen: 1712mm wide, 982mm tall and just 24.8mm deep without a stand. A slim depth is not only about bragging rights. When a big TV protrudes heavily from the wall, it can dominate a room in a rather awkward way. The G5’s flatter profile helps it feel calmer and more architectural. If you are building a media wall or upgrading a lounge where aesthetics matter, this is one of the G5’s clearest advantages over more conventional designs.

That said, the practical side should not be underestimated. The TV weighs 33.6kg without a stand, and the shipping weight is 45.6kg. I would not attempt to lift, unbox or mount this alone. You will also want to think carefully about cable routing before it goes up. A TV this slim looks its best when the surrounding installation is equally tidy, so plan power, HDMI runs and soundbar cabling ahead of time rather than treating them as an afterthought.

The finish is Satin Silver / Metallic, which suits the Gallery concept nicely. It is restrained rather than flashy, and that matters because the best big-screen TV design is usually the one you stop noticing once the picture starts. LG’s Gallery models have historically been good at that, and the 77-inch G5 continues the theme by keeping the body slim, the visual language clean and the installation focused on wall mounting.

One small but important point: check your wall construction. A 77-inch OLED of this size and weight deserves a proper mounting surface. Plasterboard alone is not something I would trust without appropriate reinforcement or specialist fixings. If in doubt, pay for professional installation. It is far cheaper than repairing a wall, a floor and a premium OLED panel.

3. Picture quality and HDR: why the new panel matters

A vivid OLED demo scene highlights the G5's contrast, colour and fine detail.

The reason the G5 is such a big deal in LG’s 2025 line-up is the move to a 4-stack Primary RGB Tandem OLED panel in the core sizes, including this 77-inch model. OLED’s long-standing appeal is still here: self-lit pixels, pixel-level dimming, excellent black levels and the ability to place bright highlights next to deep darkness without the blooming artefacts you can see on backlit LCD TVs. What the new panel approach aims to improve is the brightness and efficiency side of that equation.

In everyday terms, this should make the OLED77G54LW better equipped for HDR films, premium streaming series and games with dramatic specular highlights. The G5 supports HDR10, Dolby Vision and HLG, so the main HDR formats you are likely to encounter on discs, streaming services and broadcast-style content are covered. Dolby Vision support remains a major advantage for viewers who use services and discs mastered in that format, as it allows dynamic metadata to guide the TV scene by scene or frame by frame.

LG also includes Filmmaker Mode with Ambient Light Compensation. I am a big advocate of using accurate picture modes as a starting point, especially on a TV of this calibre. The temptation with a new OLED is to leave it in the brightest, punchiest shop-floor mode because it looks immediately dazzling. But for films, a more restrained mode usually gives you better skin tones, more natural colour and less of that processed “TV showroom” look. Ambient Light Compensation is helpful because most homes are not light-controlled grading suites.

The G5’s OLED evo panel combines pixel-level contrast with HDR10, Dolby Vision and HLG support.

The α11 AI Processor Gen2 is another central part of the picture story. Modern TV processing is about more than simply sharpening an image. It affects upscaling, noise reduction, tone mapping, motion handling and the way the TV interprets lower-quality sources. On a 77-inch screen, weak processing is far more visible than it would be on a smaller TV. Broadcast HD, older streaming content and lower-bitrate sources can all look exposed at this size, so LG’s top-tier processor is a sensible match.

The one limitation I would flag is format support: DTS is not supported. For many streaming-first households this may never become an issue, but if you have a disc collection or a media library with DTS soundtracks, you will want to think about how your player, AVR or soundbar handles audio. It is not a deal-breaker for everyone, but on a premium home cinema display it is a detail worth knowing before you redesign your setup around it.

4. Gaming performance: one of the strongest reasons to buy the 77-inch G5

Fast console gaming is one of the G5 OLED's strongest use cases.

If you are buying a premium OLED in 2025 and gaming matters to you, the OLED77G54LW immediately earns attention. It has four full 48Gbps HDMI 2.1 ports, a native 120Hz refresh rate and VRR support up to 165Hz for game and PC inputs. It also supports NVIDIA G-SYNC, AMD FreeSync Premium, ALLM and HGiG, with a 0.1ms grey-to-grey response time and ClearMR 10000 certification.

For console players, the essentials are all present. PlayStation 5 and Xbox Series X owners get the high-refresh 4K features they expect, whilst ALLM helps the TV move into the appropriate low-latency mode without constant menu diving. HGiG is particularly useful if you care about HDR gaming accuracy, because it helps prevent the console and TV from both trying to tone-map the same image in conflicting ways.

For PC gamers, the 165Hz VRR ceiling is the more exciting figure. A 77-inch OLED used as a gaming display is not for every desk, obviously, but for a living-room PC or a sim-racing setup, that higher VRR capability gives the G5 extra headroom beyond conventional 120Hz TVs. The Dolby Vision maximum refresh rate of 144Hz is also notable, especially as Dolby Vision gaming continues to matter to a niche but enthusiastic audience.

OLED response time remains a huge subjective advantage for gaming. The 0.1ms grey-to-grey figure means pixel transitions are extremely rapid, so motion clarity tends to feel immediate and clean. Fast camera pans in shooters, racing games and sports titles benefit from that crispness. ClearMR 10000 certification reinforces the G5’s positioning as a display built for motion-heavy content rather than simply static cinematic images.

There is also a scale factor that should not be ignored. A 77-inch OLED makes games feel spectacular, especially from a sofa viewing distance. The size gives open-world games, racing titles and cinematic adventures a sense of presence that smaller screens cannot match. The flip side is that poor-quality performance modes can look rougher at this size, so you may find yourself favouring balanced or quality modes more often, depending on the game.

5. Sound quality: better than the C5 on paper, but still think system-first

The OLED77G54LW has a 60W audio system and AI Sound Pro with virtual 11.1.2-channel surround processing. That is a step above the 77-inch C5’s 40W integrated audio output, and it makes sense for a premium Gallery model. A TV this large deserves more authority than thin, weedy speakers, and the G5’s audio specification is more ambitious than many slim-screen designs.

Still, I would approach the built-in sound as good everyday audio rather than a replacement for a proper cinema setup. Physics remains physics. A 24.8mm-deep wall-mounted television can do clever processing, virtualisation and dialogue enhancement, but it cannot move air like a serious soundbar with a subwoofer or a full AV receiver system. If you are buying the G5 for films, prestige drama and gaming, I would budget mentally for external audio even if you start with the built-in speakers.

The DTS limitation is another reason to think about your source chain. If your content library relies heavily on DTS tracks, make sure your disc player, console, AV receiver or soundbar can process what you need. For streaming services using Dolby formats, this will be less of a concern, but home cinema enthusiasts tend to be the very people who notice such gaps.

My practical advice is simple: use the built-in sound for a while before buying anything else, but leave space in the plan for an audio upgrade. If the G5 is going on a clean feature wall, choose the sound solution early so the finished room still looks intentional. A messy afterthought soundbar cable can spoil the very aesthetic the Gallery design is trying to achieve.

6. webOS 25, connectivity and everyday usability

webOS and LG's smart TV experience sit behind the G5's premium panel hardware.

The LG OLED77G54LW runs webOS 25, with five years of free operating system upgrades. That update commitment is increasingly important. TVs are kept for far longer than phones, and the smart platform is often the part that ages first. A five-year upgrade promise does not guarantee every app will behave perfectly forever, but it gives the G5 a stronger long-term footing than sets that ship with a smart platform and then quietly stagnate.

Connectivity is reassuringly complete. The four HDMI 2.1 ports are joined by three USB ports, Wi-Fi 6E and Bluetooth 5.1. There is also a broad digital tuner line-up covering DVB-T, DVB-T2, DVB-C, DVB-S and DVB-S2. For UK homes juggling terrestrial TV, satellite feeds, streaming sticks, consoles, disc players and sound systems, the G5 has the core hardware flexibility you would expect at this level.

Smart home support includes Alexa built in, Google Home compatibility and Apple AirPlay 2. That mix covers the main ecosystems most households are likely to use. AirPlay 2 is particularly handy if you are in an Apple-heavy home and want to send photos, videos or screen content to the TV without plugging in an extra device.

webOS 25 brings the smart TV experience, with five years of free upgrades promised for longer-term ownership.

I also like the inclusion of Calman Ready support, because it gives enthusiasts and calibrators a more serious route to fine-tuning the image. Most buyers will never pay for professional calibration, and that is perfectly fine. But on a flagship OLED, it is good to know the option exists. If you are building a high-end film room around the 77-inch G5, calibration can be the final polish that takes an already excellent image and makes it more consistent with reference standards.

As with any smart TV, I would still recommend a little housekeeping. Remove apps you do not use, check privacy settings during setup, and spend time arranging the home screen so your favourite services are not buried. A premium TV should feel frictionless, and ten minutes of setup can make the daily experience much smoother.

7. Power use, ownership costs and current buying options

The OLED77G54LW is rated Energy Efficiency Class E, with SDR power consumption listed at 101W and HDR power consumption at 299W. Those figures are useful because large OLEDs can vary significantly depending on picture mode, content brightness and HDR usage. A bright HDR film or game will naturally draw more power than a dimmer SDR broadcast, and the official SDR/HDR figures reflect that difference clearly.

One interesting comparison is with LG’s 77-inch C5. The G5 is listed at 101W in SDR and 299W in HDR, whilst the 77-inch C5 is listed at 125W in SDR and 326W in HDR. That gives the G5 a slightly more efficient profile on those figures, despite its more premium positioning and stronger 60W audio system. Efficiency will not be the main reason to buy a flagship Gallery OLED, but it is a welcome sign that the newer panel approach is not simply chasing brightness without regard for consumption.

Exact retail pricing can move quickly on premium TVs, especially around bundle promotions, seasonal sales and retailer-specific warranty offers. The most sensible approach is to check the latest live price and any current bundles before deciding whether to buy the G5 now or wait for a promotion.

Beyond the ticket price, remember the practical ownership extras. If you are wall-mounting, you may want professional installation. If you are not wall-mounting, the stand is sold separately. If you are building a proper home cinema setup, a soundbar or AV system may eventually join the shopping list. None of that undermines the G5, but it does mean the most satisfying installation is one you plan as a complete system rather than just a screen purchase.

8. LG OLED77G54LW compared: G5 versus C5 and the larger G5 options

The most natural comparison for the OLED77G54LW is LG’s 77-inch C5. The C-series has long been the go-to OLED for people who want high-end performance without stepping up to the Gallery line. The G5, however, separates itself through its Gallery design, included wall mount, 4-stack Primary RGB Tandem OLED panel in this size, stronger audio output and slightly lower listed power consumption compared with the 77-inch C5 figures.

Within the G5 range itself, the 77-inch model also makes a lot of sense. The 55-, 65-, 77- and 83-inch sizes share the key 4-stack panel technology, whilst the 97-inch version is different. The 97-inch G5 uses Brightness Booster Max rather than Brightness Booster Ultimate and is limited to 120Hz because it lacks the faster VRR support. That does not make the 97-inch model unappealing — it is obviously a huge screen — but it does make the 77-inch model feel like one of the better-balanced choices for performance and practicality.

The 77-inch G5 sits in the core part of the range, alongside the 55-, 65- and 83-inch models using LG’s newer 4-stack OLED panel.

The decision is likely to come down to priorities. If you are putting the TV on furniture and simply want a high-performing OLED for films and gaming, the C5 will naturally be tempting. If you are designing the room around a clean wall-mounted screen, the G5’s hardware and included bracket make it the more elegant choice. And if you are deciding between G5 sizes, the 77-inch model gives you the key new panel technology without moving into the more installation-heavy world of a 97-inch display.

9. Who should buy the LG OLED77G54LW?

The OLED77G54LW is not trying to be the sensible TV for everyone. It is best understood as a premium design-and-performance display for buyers who know they want a large OLED and are prepared to build the room around it. If that sounds like you, the G5 is easy to recommend. If you just want a good TV on a stand in the corner, it may be more TV — and more installation effort — than you need.

I would be more cautious if you are renting and cannot wall-mount, if your room layout forces the TV onto basic furniture, or if you primarily watch low-resolution daytime TV. The G5 can handle everyday content, but its strengths are most obvious with high-quality films, HDR series, modern games and a clean installation. The more care you put into sources, settings and room setup, the more this TV gives back.

The rating reflects the G5’s balance of big-screen OLED performance, next-generation panel technology, excellent gaming support and refined wall-first design. Its score is pulled down slightly by the lack of DTS support, the separate stand purchase and the reality that built-in audio can only go so far on a TV this slim.

10. Final verdict: a flagship OLED that knows exactly what it is

For the right room, the LG OLED77G54LW is a superb large-screen OLED that looks as considered when switched off as it does in use.

What I like most about the G5 is that it does not feel confused. It is a wall-first OLED for people who care about picture quality, gaming features and room design. The 77-inch size is particularly appealing because it sits in the core G5 range using the new 4-stack panel technology, whilst still being manageable enough for many living rooms. It is large, cinematic and premium, but not as extreme as the 97-inch model.

If you are upgrading from an older OLED, the G5’s brightness-focused panel evolution, stronger processing and gaming specification will feel meaningful. If you are moving from an LCD TV, the leap in black levels and contrast should be even more dramatic. And if you are building a living room where the TV needs to look beautiful rather than merely big, the included flush-fit wall mount gives the OLED77G54LW a clear design advantage.

My only strong recommendation is to plan the whole setup before you buy. Decide whether you will wall-mount, where the cables will go, whether you need a stand, and what audio system will eventually accompany it. Treat it like the centrepiece it is, and the G5 should reward you with one of the most complete large-screen OLED experiences in LG’s 2025 line-up.

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