If you want a compact 4K TV for both PC gaming and everyday viewing, the 42-inch LG C6 OLED is the strongest current near-size pick in the reviewed recommendations. It is not a 40-inch TV: the best-supported premium choices cluster at 42 and 43 inches, so check the set’s actual dimensions and stand footprint before buying.
Best near-40-inch 4K TV: LG C6 OLED
RTINGS names the 42-inch LG OLED42C6PUA its leading choice in its guide to 40-, 42- and 43-inch TVs, updated September 15, 2026, and also recommends the C6 for PC-monitor use. Its four HDMI 2.1 inputs, support for up to 4K at 165Hz, and compatibility with HDMI Forum VRR, FreeSync and G-SYNC make it the most convincing fit here for a PC gamer who also wants a living-room TV. RTINGS reports that it displays chroma 4:4:4 correctly, an important detail for keeping fine desktop text clear. RTINGS’ compact-TV guide and PC-monitor recommendations provide the model-specific findings.
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What the 165Hz specification does—and does not—mean
Up to 4K at 165Hz is a supported input capability, not a promise that every game will render at that resolution and frame rate. The PC’s graphics hardware, game, cable, selected TV input and settings all affect the signal you can use. Check the exact regional model and the specifications for the input you plan to connect to; do not assume every port or configuration behaves identically.
Using it as a desktop monitor
Correct chroma 4:4:4 support helps preserve fine color detail in text, but setup and viewing conditions still matter. Configure the TV’s PC input and the computer’s display output appropriately, then check text at your real desk distance. A large 42-inch screen may be comfortable from a sofa but too tall or wide for a shallow desk.
#1 Best Overall
- REGZA Engine ZR: REGZA Engine ZR is Toshiba's revolutionary Engine. With the power of precise analyzing technology, it drives the maximum potential of picture quality to reach the resolution of 4K for scenes, to deliver stunning picture quality for breath-tak-ing viewing experience.
- AI 4K Upscaler: Toshiba's unique Al upscaling technology provides the near-4K level picture quality for Full HD content. Instead of simply replicating every pixel, it intelligently detects the colors of neighboring pixels and decides the proper color of each pixel by considering the detailed texture of the real sight. No matter what the content is, you can enjoy every scene with the amazing clarity of near-4K quality.
- Dolby Vision*Atmos: Combine Dolby Vision HDR imaging with Dolby Atmos sound to get engaging audio-visual performance, transforming your TV into an entertainment powerhouse with detailed images and acoustics, so as to achieve amazing realism that you'll see, hear, and feel like never before. That is, your truly spectacular home entertainment.
- Ultimate Motion: Ultimate Motion reduces blur in fast moving scenes, offering crisp and clear images for fast action sequences. Its smooth viewing experience puts you into the scene.
- Game Mode: Game mode supports many gaming features such as ALLM (Auto Low Latency Mode), VRR (Variable Refresh Rate) and eARC. With the combination of Ultimate Motion, breathtaking reality and excitement make your gaming experience unforgettable.
Alternatives if your room or priorities differ
Samsung S90H: consider it for a bright room
The 42-inch Samsung QN42S90HAEXZA is a same-size OLED alternative. RTINGS identifies its matte screen coating as an advantage in brighter rooms, while finding the LG brighter overall and more versatile in image processing. Choose between them based on your room’s reflections and the picture-processing trade-off, not the assumption that all OLED screens handle ambient light alike. See RTINGS’ size-specific comparison and its PC-monitor guide.
Sony XR30M2: a 43-inch option with Google TV
The 43-inch Sony K-43XR30M2 is a mid-range alternative for someone who values Google TV and anti-reflective treatment. RTINGS lists four HDMI 2.1-bandwidth inputs, 120Hz and VRR, but describes its dark-room contrast and peak brightness as weaker than the LG’s. It is one inch larger diagonally than the LG C6, so compare the cabinet or desk measurements rather than relying on the size label alone. RTINGS’ compact-TV guide has the model assessment.
Rank #2
- 4k Ultra HD (2160p resolution): Enjoy breathtaking HDR10 4K movies and TV shows at 4 times the resolution of Full HD, and upscale your current content to Ultra HD-level picture quality.
- High Dynamic Range: Provides a wide range of color details and sharper contrast, from the brightest whites to the deepest blacks.
- All-in-one: Get right to your good stuff. With Fire TV, you can enjoy a world of entertainment from apps like Prime Video, Netflix, Disney+, Hulu, and HBO Max. Plus, stream for free with Fire TV Channels, Pluto TV, Tubi, and more. Access over 1.8 million movies and TV episodes. Subscriptions may be required. Feature and content availability may vary.
- Smart Home: Your smart home hub. Pair Fire TV with compatible smart home devices to see live camera feeds, use AirPlay, control your lighting and thermostat, and more.
- Free Content: Stream for free. Access over 1 million free movies and TV episodes from popular ad-supported streaming apps like Fire TV Channels, Tubi, and Pluto TV. Subscriptions may be required. Feature and content availability may vary.
LG C5: useful prior-generation comparison
If you are considering an earlier model, What Hi-Fi lists the 42-inch LG C5 as a 4K OLED with webOS 25 and four 48Gbps HDMI 2.1 inputs. Its listed gaming features include 4K/144Hz, VRR, ALLM, Dolby Vision game mode and HGiG. These are C5-specific details; do not assume they describe the C6. Availability and regional model suffixes can vary. What Hi-Fi’s C5 review covers that generation. TechRadar also includes the C5 and 43-inch Samsung QN90F Neo QLED among its compact-TV options, but the cited guide does not establish either as a stronger current PC-gaming choice than the C6. TechRadar’s small-TV guide.
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1Fix the driver behind crashes, sound loss and screen glitches2Clear out junk files and repair common Windows errors3Scan for outdated or missing drivers - takes under a minuteHow to choose the right size and gaming features
Measure the space, not just the diagonal
“40-inch TV” recommendations often include 42- and 43-inch sets. Measure the available width and height, the TV’s stand footprint, and your viewing distance before settling on a model. A one- or two-inch diagonal difference can matter when the set has to fit a desk, shallow cabinet or tight alcove.
Rank #3
- 1080p Resolution - Watch movies and TV shows in high-definition picture quality.
- LED-backlit LCD screen - With reliable and long-lasting LED lighting, this LCD screen delivers a wide range of colors and contrast for a memorable viewing experience.
- Watch what you want - Stream over 1.5 million movies and TV episodes. Watch favorites with subscriptions to Netflix, Prime Video, Disney+, and more. Subscription fees may apply.
- All your entertainment in one place - Watch live and free TV, play video games, and stream music.
- Smart and always getting smarter - Fire TV adds new Alexa skills, features, smart home capabilities, and voice functionality all the time.
Match refresh rate and VRR to the PC
For high-refresh gaming, verify the exact model’s native panel refresh rate and which inputs support the needed HDMI 2.1 bandwidth. Confirm that the TV and graphics card support the same variable-refresh-rate standard: the C6 is listed with HDMI Forum VRR, FreeSync and G-SYNC support. The recommendations reviewed here do not provide numeric input-lag measurements, so they do not establish a precise latency ranking among these models.
Think about glare, films and streaming
OLED contrast can suit films and games in a darker room, while ambient light and reflections may make a different screen treatment more appealing. The S90H’s matte coating is its stated bright-room differentiator in RTINGS’ comparison. For general entertainment, also check the HDR formats, upscaling, streaming apps and speakers against the services and equipment you actually use. The cited comparisons do not establish a universal winner for audio quality or app availability.
Quick Recap
Best Value
- CRYSTAL PROCESSOR: Powerful processor enhances colors and sharpens details for a vibrant 4K viewing experience. Experience every shade of color as it was meant to be seen in dazzling 4K. Plus, make your movies, TV shows, games and sports look even better with powerful 4K upscaling.
- ENDLESS FREE CONTENT: Watch 2,700+ free streaming options, including 750+ subscription-free channels on Samsung TV Plus. Enjoy news, sports, movies, kids' shows and reality TV — all without a subscription. Discover endless entertainment with new content added regularly, tailored to your mood and interests.*
- MOTION XCELERATOR: Experience clear picture and smooth motion in games and sports. Enjoy smooth motion and clear visuals with technology that estimates and adjusts frame transitions in real time. Whether gaming or watching sports, enjoy up to 4K 60Hz performance that brings every play, move and scene to life with realistic clarity and motion.
- COLOR BOOSTER: Supercharge your color. From fiery reds to sparkling blues, make every color come to life with intensity. Color Booster transforms your content into a visual masterpiece.
- 4K UPSCALING: Upgrades what you watch to crisp 4K clarity. Upgrade your favorite shows, movies and more. Experience incredible details and clarity in every frame, even from lower-quality sources, with advanced upscaling technology.
Rank #4
- A treat for the eyes: Sharp 4K brings out rich detail on our 43" flat screen TV, while colors pop off in lifelike clarity with HDR10. Roku Smart Picture cleans up incoming TV signals, optimizes them, and chooses the right picture mode.
- Seamless streaming: With fast Wi-Fi and apps that launch in a snap, Roku Select Series TVs get you to your entertainment quickly. You get excellent picture quality, clear sound, automatic updates, and more. It’s simple to use. Hard to outgrow.
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