Display
54.6", VA, Direct LED, 3840 x 2160 pixels
54.6
Refresh rate
50 Hz / 60 Hz (hertz)
50 Hz
Dimensions
1224.6 x 707.8 x 76.6 mm (millimeters)
1224.6
Weight
9.6 kg (kilograms)
9.6 k
Processor
Crystal Processor 4K
4K
Overview
The Samsung UN55U7900F is a 54.6-inch Crystal UHD 4K smart TV with a VA, Direct LED panel and One UI Tizen. The VA, Direct LED panel lists 4K resolution, 10 bits (8 bits + FRC) colour, PurColor and UHD Dimming, but no gamut or brightness figure. Its 60 Hz ceiling and ALLM suit casual console play; VRR and HDMI 2.1 are absent, and two HDMI inputs limit larger setups. One UI Tizen, the Crystal Processor 4K and 20W audio handle basic streaming and broadcast use. At 1224.6 mm wide and 9.9 kg with the stand, placement should be measured before delivery. Buy it if you want a simple Samsung 4K smart TV for streaming and television; skip it if wide-gamut HDR, 120 Hz gaming or generous connectivity is required.
BrandSamsungPanel TypeVA, Direct LEDResolution3840 x 2160 pixelsRefresh Rate50 Hz / 60 Hz (hertz)
Key Highlights
- UN55U7900F uses a 54.6-inch VA, Direct LED panel with 3840 x 2160 pixels resolution
- 50 Hz / 60 Hz (hertz) sets the published motion ceiling; This is a basic Crystal UHD platform rather than a gaming-focused set.
- Not published and 10 bits (8 bits + FRC) define the published colour specification
- 2 x HDMI 2.0 provides the main source connections, with HDMI eARC for external audio
- Compared with UN58U7900F, screen size, stand weight and VESA requirements are the practical differences
Who Should Buy the samsung UN55U7900F
+ Best For
Budget-conscious streaming and broadcast viewing
50 Hz / 60 Hz (hertz) with ALLM covers casual console use, but VRR is absent.
4K streaming
One UI Tizen and the Crystal Processor 4K provide apps and upscaling
External sound systems
HDMI eARC is listed for a soundbar or receiver
Measured installations
the 54.6-inch screen is manageable when its exact width and 9.9 kg (kilograms) stand weight are checked
× Not Ideal For
Wide-gamut HDR enthusiasts and high-refresh gamers
HDR lacks published brightness, gamut and local-dimming support.
Desktop-style connectivity
DisplayPort and USB-C video are not listed
Flexible tabletop positioning
the source lists no stand adjustment
Buyers needing laboratory claims
response time is not published and picture measurements are limited
Display Performance
Refresh Rate
50 Hz / 60 Hz (hertz)
50 Hz / 60 Hz (hertz) with ALLM covers casual console use, but VRR is absent.
Response Time
Not published
The sheet provides no independent transition measurement for UN55U7900F beyond this published value.
Brightness
Not published
No usable luminance figure is available for comparing UN55U7900F's HDR output.
Contrast
Not published
UN55U7900F's black-level performance cannot be ranked numerically from the sheet.
Colour Gamut
Not published
This is UN55U7900F's published coverage, not a calibration-accuracy result.
HDR
HDR, HDR10, HDR10+, HLG (Hybrid Log Gamma)
HDR lacks published brightness, gamut and local-dimming support.
Gaming Performance
Refresh Rate50 Hz / 60 Hz (hertz)50 Hz / 60 Hz (hertz) with ALLM covers casual console use, but VRR is absent.
Response TimeNot publishedA measured pixel-transition figure is not available for UN55U7900F.
VRR / Adaptive SyncAuto Low Latency Mode (ALLM)The sheet does not establish a full variable-refresh implementation.
GPU Requirement3840 x 2160 pixels at 60 HzEntry or mid-range hardware can target 4K60 with sensible settings.
HDR & Brightness Reality
UN55U7900F supports HDR, HDR10, HDR10+, HLG, but the panel sheet does not publish brightness, contrast, wide-gamut coverage or local dimming. That makes HDR support mainly an input-format feature rather than evidence of strong HDR presentation. The Direct LED panel and Crystal Processor 4K may improve ordinary sources, yet there is no hardware figure showing meaningful highlight headroom. Dolby Vision is absent, so buyers should treat HDR10+ compatibility as the limit, not a performance guarantee.
Connectivity & Ports
HDMI2 x HDMI 2.02 x HDMI 2.0 handles consoles, players and PCs.
DisplayPortNone listedPC video must use HDMI because UN55U7900F has no published DisplayPort input.
USB-CNone listedLaptop video and USB-C charging are not part of UN55U7900F's specification.
USB Hub1 x USB 2.0 Type-AUN55U7900F's Type-A ports suit media and accessories, not a full laptop dock.
Audio OutHDMI eARCUse UN55U7900F's listed return channel or dedicated output for external sound.
Real-World Use Cases
One UI Tizen and the Crystal Processor 4K cover apps, navigation and 4K upscaling
the 54.6-inch screen and tuner connections suit everyday broadcast viewing
50 Hz / 60 Hz (hertz) with ALLM covers casual console use, but VRR is absent.
HDMI eARC supports a soundbar or receiver route
Pros & Cons
Pros
- 54.6-inch VA, Direct LED 4K panel with Not published
- 50 Hz / 60 Hz (hertz) motion specification fits the model's intended use
- One UI Tizen and Crystal Processor 4K provide integrated streaming and upscaling
- 2 x HDMI 2.0 plus HDMI eARC cover the main home-entertainment connections
- UN55U7900F offers a clearly defined size alternative to UN58U7900F
Cons
- HDR lacks published brightness, gamut and local-dimming support.
- Dolby Vision is absent
- No DisplayPort or USB-C video input is listed
- The fixed stand gives no tilt, height or swivel adjustment
Score & Ratings
5.8/10
Good
Television Identity & Market
6
| Specification | Value |
|---|---|
| Brand | Samsung |
| Series | U7900F |
| Model | UN55U7900F |
| Model Alias | UN55U7900FFXZAUN55U7900FFXZC55" Crystal UHD U7900F 4K Smart TV (2025) |
| Model Year | 2025 |
| Available Colors | Black |
Screen Geometry & Format
4
| Specification | Value |
|---|---|
| Screen Size | 54.6 in (inches) |
| Marketed Screen Size | 54.6 in (inches) |
| Aspect Ratio | 16:9 |
| Screen-to-Body Ratio | 94.95 % (percent) |
Panel Architecture & Light Control
3
| Specification | Value | What It Means |
|---|---|---|
| Panel Type | VA, Direct LED | VA, Direct LED determines the core black-level, viewing-angle and light-control behaviour buyers can expect from UN55U7900F. |
| Panel Bit Depth | 10 bits (8 bits + FRC) | 10 bits (8 bits + FRC) supports the listed colour gradation; FRC is used rather than native 10-bit output. |
| Display Colors | 1.07 billion colors / 30-bit |
Surface Treatment & Viewing Layer
1
| Specification | Value |
|---|---|
| Screen Coating | Glossy |
Resolution, Scaling & Signal
4
| Specification | Value |
|---|---|
| Native Resolution | 3840 x 2160 pixels |
| Pixel Density | 80 ppi (pixels per inch) |
| Pixel Pitch | 0.315 mm (millimeters) |
| HDCP Support | Yes |
◑
Luminance, Blacks & Contrast
1
| Specification | Value |
|---|---|
| Viewing Angles | 178° / 178° |
HDR Formats & Tone Mapping
2
| Specification | Value | What It Means |
|---|---|---|
| HDR Support | HDR10+HDR10HLG |
HDR, HDR10, HDR10+, HLG (Hybrid Log Gamma) lets UN55U7900F accept these formats, but missing luminance and dimming data prevents a firm HDR-performance ranking. |
| Filmmaker Mode | Yes |
Motion Processing & Response
2
| Specification | Value |
|---|---|
| Maximum Refresh Rate | 50 Hz / 60 Hz (hertz) |
| Motion Processing | Motion Xcelerator |
Console, VRR & Game Tools
2
| Specification | Value |
|---|---|
| Auto Low Latency Mode | Auto Low Latency Mode (ALLM) |
| Game Mode | Yes |
Picture Intelligence & AI
1
| Specification | Value |
|---|---|
| Filmmaker Mode | Yes |
Broadcast Tuners & Reception
5
| Specification | Value |
|---|---|
| Built-In TV Tuner | Yes |
| Tuner Configuration | Analog (NTSC/PAL/SECAM)ATSCClear QAM |
| Analog Tuner | NTSC / PAL / SECAM |
| North American Digital Tuner | ATSC |
| Clear QAM | clear qam |
Compute, Memory & Storage
2
| Specification | Value |
|---|---|
| Processor Brand Name | Crystal Processor 4K |
| CPU Architecture | 4 |
Smart Platform & System
2
| Specification | Value | What It Means |
|---|---|---|
| Smart TV | Yes | |
| Operating System | One UI Tizen | One UI Tizen supplies UN55U7900F's streaming apps and smart-TV interface without an external player. |
HDMI Signal Interface
7
| Specification | Value |
|---|---|
| Total HDMI Ports | 2 |
| HDMI 2.0 Ports | 2× HDMI 2.0 |
| HDMI CEC | Yes |
| Audio Return Channel | Yes |
| Enhanced Audio Return Channel | Yes |
| Auto Low Latency Mode | Auto Low Latency Mode (ALLM) |
| HDCP Support | Yes |
USB, Audio & Legacy I/O
3
| Specification | Value |
|---|---|
| Total USB Ports | 1 |
| USB-A 2.0 Ports | 1× USB 2.0 |
| Ethernet Port | 1× RJ45 |
Wireless, LAN & Casting
6
| Specification | Value |
|---|---|
| LAN | Yes |
| Wi-Fi | Wi-Fi 8 |
| Wi-Fi Standards | 802.11a |
| Bluetooth | Bluetooth 5.3 |
| Wi-Fi Direct | Yes |
| DLNA | Yes |
Speaker Layout & Output
5
| Specification | Value |
|---|---|
| Built-In Speakers | Yes |
| Speaker Configuration | 2.0 CH |
| Speaker Channels | 2.0 CH |
| Total Audio Output | 20W |
| Total Speaker Output | 20W |
Sound Formats & Enhancement
3
| Specification | Value |
|---|---|
| Dolby Digital | Yes |
| Dolby Digital Plus | Yes |
| Q-Symphony | Yes |
Panel-Only Size & Mass
4
| Specification | Value |
|---|---|
| Width Without Stand | 1224.6 mm (millimeters) |
| Height Without Stand | 707.8 mm (millimeters) |
| Depth Without Stand | 76.6 mm (millimeters) |
| Weight Without Stand | 9.6 kg (kilograms) |
Assembled TV Size & Mass
4
| Specification | Value |
|---|---|
| Width With Stand | 1224.6 mm (millimeters) |
| Height With Stand | 759.1 mm (millimeters) |
| Depth With Stand | 199 mm (millimeters) |
| Weight With Stand | 9.9 kg (kilograms) |
Exterior Styling & Stand Footprint
1
| Specification | Value |
|---|---|
| Chassis Color | Black |
Wall Mounting & Installation
3
| Specification | Value |
|---|---|
| VESA Mount | 200 x 200 mm |
| VESA Interface | 200 x 200 mm |
| VESA Size | 200 x 200 mm |
Electrical Load & Efficiency
6
| Specification | Value |
|---|---|
| Power Input | 100 V - 120 V (volts) |
| AC Frequency | 50 Hz - 60 Hz (hertz) |
| Typical Power Consumption | 79 W (watts) |
| Average Power Consumption | 79 W (watts) |
| Maximum Power Consumption | 125 W (watts) |
| Standby Consumption | 0.5 W (watts) |
Picture Feature Inventory
1
| Specification | Value |
|---|---|
| Filmmaker Mode | Yes |
Gaming Validation & Compatibility
1
| Specification | Value | What It Means |
|---|---|---|
| ALLM | Auto Low Latency Mode (ALLM) | Auto Low Latency Mode (ALLM) lets a compatible console request the low-latency game mode automatically, reducing menu changes. |
Regulatory & Industry Approvals
1
| Specification | Value |
|---|---|
| CE | Yes |
In-the-Box Components
1
| Specification | Value |
|---|---|
| Screen Size | 54.6 in (inches) |
Frequently Asked Questions
01 What changes between UN55U7900F and UN58U7900F? +
UN55U7900F uses a 54.6-inch panel, while UN58U7900F is the nearest size sibling. The core family platform is closely related, so width, stand weight and VESA pattern are the main practical differences.
02 What limits the HDR claim on UN55U7900F? +
HDR lacks published brightness, gamut and local-dimming support. The listed formats confirm compatibility, but they do not prove highlight intensity or black-level control.
03 How should buyers read the gaming specification of UN55U7900F? +
The native limit is 50 Hz / 60 Hz (hertz). 50 Hz / 60 Hz (hertz) with ALLM covers casual console use, but VRR is absent. Processing features do not raise the panel's native 4K refresh ceiling.
04 Which connections matter most on UN55U7900F? +
The sheet lists 2 x HDMI 2.0 and 1 x USB 2.0 Type-A. HDMI eARC provides the published external-audio route, while DisplayPort and USB-C video are absent.
05 What installation detail should be checked for UN55U7900F? +
With the stand, it is 1224.6 mm (millimeters) wide, 199 mm (millimeters) deep and 9.9 kg (kilograms). Wall mounting requires the published 200 x 200 mm pattern and a bracket rated for the panel weight.
Reviews
DISPLAYINPUT · INDEPENDENT · SPEC-BASED · NO SPONSORED PLACEMENT
SHEET № UN55U7900F