Samsung S90D OLED 4K TV Review

Introduction

The Samsung 77-Inch OLED S90D 4K UHD Smart TV is one of those products that looks straightforward until you start comparing the details that actually affect daily use. This review focuses on what stands out in real-world terms, with official reference material available on the official product page.

What These Products Are and Who They're For

The Samsung 77-Inch OLED S90D is a large-screen 4K smart TV aimed at buyers who want premium OLED picture quality without stepping all the way up to Samsung’s top-tier OLED line. In this 77-inch version, the S90D is positioned around a QD-OLED panel, combining OLED’s pixel-level light control with quantum-dot color reproduction.

It is best suited to movie watchers, console and PC gamers, and sports viewers who want a high-contrast, fast-response display with strong HDR performance. It is also a good fit for people already comfortable with Samsung’s Tizen smart TV platform and Samsung’s preference for HDR10+ over Dolby Vision.

This is not a budget TV, a simple “dumb” display, or the best choice for buyers who specifically need Dolby Vision support.

Quick Specs

Feature	Samsung 77-Inch OLED S90D
Screen size	77 inches
Display type	OLED; 77-inch model positioned as QD-OLED
Resolution	4K UHD
HDR support	Quantum HDR+, HDR10+; no Dolby Vision
Refresh rate / gaming	Up to 144Hz support, VRR, low input lag
Smart platform	Samsung Tizen
Audio	Dolby Atmos support
Target use	Movies, gaming, sports, premium living-room TV use
Model family	Samsung S90D OLED

Picture Quality

The S90D’s main appeal is its OLED image quality. Because OLED pixels generate their own light, the TV can shut individual pixels off for deep blacks and strong scene-by-scene contrast. That gives dark movies, sci-fi, prestige TV, and games a level of depth that conventional LCD TVs generally struggle to match.

The 77-inch S90D’s QD-OLED positioning is important. QD-OLED panels are known for combining OLED black levels with strong color performance, particularly in bright HDR color highlights. That makes the S90D especially compelling for HDR movies and modern games with saturated lighting, neon effects, fire, sunlight, and other high-impact visual elements.

Brightness is another strength for this class of TV. The S90D is designed to deliver a punchier HDR image than entry-level OLED models, and Samsung’s Quantum HDR+ processing is intended to make HDR highlights look more dynamic. As with most OLED TVs, though, it is still at its best in rooms where you can control direct sunlight and harsh reflections. If the TV will sit opposite large uncovered windows all day, a high-end Mini LED TV may still be the more practical choice.

HDR Support: Excellent HDR10+, But No Dolby Vision

The biggest format limitation is Samsung’s continued lack of Dolby Vision support. The S90D supports HDR10+ and Samsung’s Quantum HDR+ processing, but it does not support Dolby Vision.

That matters because many streaming services and discs use Dolby Vision for dynamic HDR metadata. On the S90D, Dolby Vision content will fall back to a supported HDR format rather than playing in Dolby Vision. The picture can still look excellent, but buyers who specifically want Dolby Vision for their movie library, Apple TV streaming habits, or UHD Blu-ray collection should consider that a real limitation.

For Samsung users or viewers who mostly stream HDR10/HDR10+ content, the omission may not be a deal-breaker. For home theater purists, it is one of the clearest reasons to compare the S90D against LG and Sony OLED alternatives.

Motion and Gaming Performance

The S90D is one of the stronger gaming TVs in Samsung’s OLED range thanks to its combination of 4K resolution, up to 144Hz support, variable refresh rate, and low input lag.

For console gaming, VRR helps smooth out frame-rate fluctuations, while OLED’s near-instant pixel response gives fast movement a clean, responsive look. For PC gamers, the 144Hz capability is a major advantage over TVs limited to 120Hz, especially if the TV will double as a large-format gaming display.

The S90D is also well suited to sports and fast action. OLED response times help reduce blur around moving players, vehicles, and camera pans. As always, motion processing preferences vary: some viewers like interpolation for smoother sports, while others prefer it off for movies to avoid the soap-opera effect.

Sound Quality

The S90D includes Dolby Atmos support, which helps it fit more naturally into modern streaming and home theater setups. For casual viewing, news, sports, and everyday TV, the built-in sound system should be sufficient.

That said, a 77-inch OLED of this quality deserves a capable soundbar or surround setup if you want audio to match the picture. Thin OLED TVs have limited cabinet space for speakers, so bass weight, front soundstage size, and cinematic impact will be better with an external audio system.

Smart TV Experience

Samsung’s Tizen platform gives the S90D a full smart TV experience with streaming apps, settings menus, account integration, and Samsung’s broader connected-TV ecosystem. It is designed for users who want built-in apps rather than relying entirely on an external streaming box.

Tizen is feature-rich, but it may not appeal to everyone. Some buyers prefer the simplicity of Roku, the app behavior of Google TV, or the consistency of an Apple TV 4K. If you are particular about interface speed, ads, app layout, or remote design, it is worth checking the current Tizen interface in person before buying.

For many users, the best setup may be to use the S90D’s excellent panel and gaming features while pairing it with a preferred external streamer.

Security: Attack Surface

Because this is a smart TV, the S90D has a meaningful digital attack surface. It connects to the internet, runs streaming apps, receives firmware updates, supports user accounts, and may interact with other devices on your home network.

The practical risks are similar to other modern smart TVs:

• Samsung account exposure if reused or weak passwords are used
• App-level tracking and privacy settings
• Firmware update dependence for bug fixes and platform security
• Local network visibility to other connected devices
• Voice, personalization, and advertising settings depending on configuration

Basic hardening is straightforward:

• Keep firmware updates enabled or check for updates regularly.
• Use a strong, unique Samsung account password.
• Review privacy, advertising, and viewing-data settings during setup.
• Disable features you do not use, especially voice or personalization options.
• Put smart home and entertainment devices on a guest or IoT network if your router supports it.
• If you use an external streamer, consider limiting the TV’s own app usage.

This is not a high-risk device in the way a laptop or NAS can be, but it should still be treated as an internet-connected computer in your living room.

Pros

• Excellent OLED contrast with deep black levels
• 77-inch QD-OLED model offers strong color performance for HDR movies and games
• Bright, punchy HDR presentation for an OLED TV
• Quantum HDR+ and HDR10+ support
• Strong gaming feature set with up to 144Hz, VRR, and low input lag
• Fast OLED response is well suited to gaming and sports
• Dolby Atmos support
• Full Samsung Tizen smart TV platform
• Large 77-inch size is immersive for home theater use

Cons

• No Dolby Vision support
• Tizen may not be everyone’s preferred smart TV interface
• Built-in audio is unlikely to match the scale of the 77-inch picture
• OLED is still best in rooms where lighting can be controlled
• Smart TV features introduce account, privacy, and update considerations
• Buyers should confirm the exact regional model and panel type before purchase, especially outside the 77-inch configuration

When Not to Buy

Do not buy the Samsung S90D if Dolby Vision is a must-have feature. Samsung’s HDR strategy centers on HDR10+ rather than Dolby Vision, and that will be a deciding factor for some movie enthusiasts.

You should also look elsewhere if the TV will be used mainly in a very bright room with lots of direct sunlight. The S90D is bright for an OLED, but a premium Mini LED TV may deliver better full-screen brightness for daytime viewing.

It is also not the best choice if you want the simplest possible smart TV experience. Tizen is capable, but it is still a full smart platform with accounts, settings, apps, recommendations, and privacy choices. If you prefer a cleaner interface, you may want to budget for an external streaming device.

Finally, skip it if you are shopping primarily by price. The S90D is a premium OLED TV, and its value depends on whether you will actually benefit from OLED contrast, QD-OLED color, and high-refresh gaming features.

Who Should Buy

Buy the Samsung 77-Inch OLED S90D if you want a large premium OLED TV for movies, gaming, and mixed entertainment use. It is especially appealing if you play on a gaming PC or modern console and want 4K, high refresh rate support, VRR, low input lag, and OLED response in one display.

It is also a strong fit for Samsung ecosystem users who are comfortable with Tizen and HDR10+. If your main priorities are contrast, color, gaming responsiveness, and a cinematic 77-inch screen size, the S90D makes a lot of sense.

Final Verdict Rationale

The Samsung 77-Inch OLED S90D is a strong premium TV built around the qualities that make OLED desirable: deep blacks, precise contrast, fast response, and high-impact HDR. The 77-inch QD-OLED configuration adds strong color performance, while Samsung’s gaming feature set makes it especially attractive for players who want more than a standard 120Hz TV.

Its main compromise is format support. The lack of Dolby Vision is not a small omission for home theater buyers, and Tizen will not be everyone’s favorite interface. Built-in sound is also unlikely to satisfy buyers building a serious cinema setup.

Even with those caveats, the S90D is a compelling choice if you want a large, bright, gaming-ready OLED with Samsung’s HDR10+ ecosystem and smart TV platform. It is best judged as a premium all-rounder: excellent for movies and games, less ideal for Dolby Vision loyalists or extremely bright rooms.

Where to Buy

If you are ready to buy, you can check current pricing on Samsung 77-Inch OLED S90D 4K UHD Smart TV.