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LG OLED77C51LA 77" OLED evo AI C5 4K Ultra HD Smart TV (2025)

LG OLED77C51LA 77" OLED evo AI C5 4K Ultra HD Smart TV (2025)

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$2,619.40at DragtekChecked Nov 11

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  • Last seen at $2,619.40 at Dragtek on Nov 11.

Our take on the LG OLED77C51LA 77" OLED evo AI C5 4K Ultra HD Smart TV (2025)

The LG C5 is LG's mainstream OLED evo line for 2025, here in a 77-inch size. Each pixel lights itself, so blacks are true black and contrast is effectively infinite, and the Alpha 9 Gen8 processor handles upscaling, tone mapping and AI picture and sound processing. It runs at 120Hz natively with variable refresh up to 165Hz, supports Dolby Vision, HDR10 and HLG, and carries G-Sync and FreeSync for gaming. It suits movie and sports viewers who want deep contrast in a bright room and gamers who want OLED speed on a big screen; it sits below LG's brighter G-series and above the entry B-series.

Best forLarge living rooms and home theatersMovie and streaming fans who want true blacksConsole gamers wanting 120Hz OLED with VRRBuyers who want LG's mid-tier OLED rather than the flagship
Pros
  • Per-pixel OLED dimming gives true black and near-infinite contrast
  • Alpha 9 Gen8 processor with AI upscaling and AI Picture Pro
  • 120Hz native panel, VRR to 165Hz, G-Sync and FreeSync compatible
  • Dolby Vision, HDR10 and HLG support plus FILMMAKER MODE
  • Four HDMI inputs with 4K 120Hz, QMS and OLED Motion
  • Brightness Booster light structure lifts highlights over older panels
Cons
  • Not as bright as LG's G-series MLA panels in a sunlit room
  • OLED risk of permanent burn-in with static logos or tickers
  • 77-inch panel is heavy and needs a wide stand or wall mount
  • Reflective screen in bright rooms with windows opposite
  • Peak HDR brightness still trails top mini-LED sets

LG OLED77C51LA 77" OLED evo AI C5 4K Ultra HD Smart TV (2025) prices at every store

  • DragtekNew

    In stockShips from Bulgaria · priced in EUR (€2,354.08) · duties may applyReturn policy

    $2,619.40Checked Nov 11
    Visit Dragtek

What reviewers say

Owners and reviewers treat the C-series as the value pick of LG's OLED range: deep blacks, strong gaming features and good processing, with brightness the usual compromise against the brighter G-series.

What people mention
  • Picture contrastPraisedOwners say dark scenes show detail that LCD sets lose in the shadows.
  • BrightnessMixedReviewers find it bright enough for most rooms but behind the G-series in daylight.
  • GamingPraisedPlayers report low lag and smooth motion with VRR on consoles and PCs.
  • SoundCriticisedThe built-in speakers are described as thin, with a soundbar recommended.
  • ReflectionsCriticisedThe glossy screen picks up window and lamp reflections in bright rooms.
  • Burn-inMixedSome owners worry about static logos and news tickers over long use.

About the LG OLED77C51LA 77" OLED evo AI C5 4K Ultra HD Smart TV (2025)

The LG OLED77C51LA is a 77-inch OLED evo smart TV with a 4K Ultra HD display (3840 x 2160). Each pixel produces its own black level for contrast, depth and detail. The display covers 100% color fidelity and 100% color volume, and a Brightness Booster light emission structure raises brightness.

The α9 AI Processor 4K Gen8 handles AI upscaling to 4K, AI picture and brightness control, and surround sound. HDR support includes Dolby Vision, HDR10 and HLG. The refresh rate is 120Hz native, with VRR up to 165Hz listed for the display and up to 144Hz for gaming. Gaming features include G-Sync and FreeSync compatibility, HGIG mode, ALLM, a Game Dashboard and Dolby Vision at 4K 120Hz.

The TV runs webOS 25 and comes with the AI Magic Remote, which has an AI button, voice commands and drag and drop features. It also supports Apple AirPlay 2, Apple Home, Google Home and Google Cast. Audio comes from a 2.2 channel, 40W downward-facing speaker system with Dolby Atmos and a virtual 11.1.2 up-mix.

Screen size
77 inches
Display type
4K OLED evo
Resolution
3840 x 2160 (4K Ultra HD)
Refresh rate
120Hz native (VRR 165Hz)
Processor
α9 AI Processor 4K Gen8
HDR
Dolby Vision, HDR10, HLG
Picture features
α9 AI Super Upscaling 4K, AI Genre Selection (SDR/HDR), AI Brightness Control, AI Picture Pro, FILMMAKER MODE, OLED Dynamic Tone Mapping Pro, Pixel Dimming, OLED Motion, QMS, 10 picture modes
High frame rate
4K 120 fps (HDMI, RF, USB)
Gaming
G-Sync Compatible, FreeSync Compatible, HGIG mode, Game Optimizer (Game Dashboard), ALLM, VRR up to 144Hz, Dolby Vision for Gaming (4K 120Hz), response time under 0.1ms

Questions and answers

Is the LG C5 worth it over the C4?
The C5 adds the Alpha 9 Gen8 processor, a revised Brightness Booster structure and the new AI Magic Remote button. Picture handling and brightness are modest steps up; the C4 remains close if you find one.
How does the C5 compare with the LG G5?
The G5 uses a brighter MLA panel and a flush wall-mount design. The C5 gives up some peak brightness but keeps the same OLED contrast and gaming features for less.
Does it support 4K 120Hz and VRR for consoles?
Yes. The panel is 120Hz native with VRR up to 165Hz, and it supports G-Sync and FreeSync plus 4K 120fps over HDMI.
What is in the box?
The TV, its stand, the AI Magic Remote and the power cable. A wall mount and HDMI cables are not included.
Is a 77-inch OLED too big for a normal room?
LG recommends a viewing distance of roughly 1.5 to 2.5 meters for 4K at this size. Measure your wall and seating before choosing; the set is wide and needs a sturdy stand.
Does it have Dolby Vision and Dolby Atmos?
It supports Dolby Vision, HDR10 and HLG for picture. Sound processing includes AI Sound Pro; check the full spec for Atmos passthrough if you use a soundbar.
Where is the LG OLED77C51LA 77" OLED evo AI C5 4K Ultra HD Smart TV (2025) cheapest?
At Dragtek, for $2,619.40, as of our latest check.

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Smart platform
webOS 25
Smart features
Voice recognition, hands-free voice control, Voice ID, AI Chatbot, full web browser, Multi View, Always Ready, Home Hub, USB camera compatible, LG ThinQ smartphone app
Compatibility
Apple AirPlay 2, Apple Home, Google Home / Hub, Google Cast
Audio output
40W, 2.2 channel, downward-facing speakers
Sound features
Dolby Atmos, α9 AI Sound Pro (Virtual 11.1.2 up-mix), Clear Voice Pro, AI Acoustic Tuning, LG Sound Sync, Sound Mode Share, simultaneous audio output, Bluetooth Surround Ready (two-way playback), WOW
Audio codecs
AC4, AC3 (Dolby Digital), EAC3, HE-AAC, AAC, MP2, MP3, PCM, WMA, apt-X
HDMI
4 inputs supporting 4K 120Hz, eARC, VRR, ALLM and QMS; eARC on HDMI 2; SimpLink (HDMI CEC)
Other ports
3 x USB 2.0, 1 x Ethernet, 2 x RF input (antenna/cable), 1 x optical digital audio out (SPDIF), 1 x CI slot (except UK, Ireland)
Wireless
Wi-Fi 6, Bluetooth 5.3
Tuners
Digital: DVB-T2/T, DVB-C, DVB-S2/S; analog supported
Accessibility
High Contrast, Gray Scale, Invert Colors
Size without stand
1,711 x 982 x 47.1 mm (W x H x D)
Size with stand
1,711 x 1,035 x 267 mm (W x H x D)
Stand
520 x 267 mm (W x D)
Weight
23.5 kg without stand; 27.1 kg with stand
Packaging
1,879 x 1,130 x 228 mm; 38.5 kg
VESA mount
300 x 200 mm
Power supply
AC 100~240V, 50-60Hz
Standby power
Less than 0.5 W
In the box
Magic Remote (MR25GA / MR25GB), power cord attached to TV
Warranty
24 months
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