The Tool Desk
Outbyte PC Repair FREERepair Windows errors before they cause bigger problemsFix Now →Outbyte Driver Updater FREEScan for outdated or missing drivers - takes under a minuteDriver Scan →iTechGuides is reader-supported. When you buy through links on our site, we may earn an affiliate commission. As an Amazon Associate I earn from qualifying purchases. Learn more
Choose a 4K OLED gaming monitor by matching its resolution and refresh rate to the games, device, and connection you will actually use. A 4K label describes image resolution; a 120 Hz or 240 Hz rating describes how often the display can refresh. Neither specification guarantees that a particular game will run at the monitor’s maximum refresh rate.
What resolution and refresh rate mean
Resolution is the number of pixels used to form the image. A 4K UHD monitor uses 3840 × 2160 pixels, providing more image detail than a QHD display at 2560 × 1440. Refresh rate, measured in hertz (Hz), is how many times per second the display can refresh its image. A 120 Hz display can refresh up to 120 times per second; that does not mean every game produces 120 frames per second.
For example, LG lists its 48-inch 48GQ900-B OLED as 4K UHD with a 120 Hz refresh rate and an overclocked mode up to 138 Hz. Those are separate specifications, and the overclocked figure is a mode beyond the listed 120 Hz rate. See LG’s product specifications for the current US listing.
How to decide which specification to prioritize
Prioritize 4K detail when image resolution matters most
Choose 4K if you want the pixel detail of 3840 × 2160 and your device can output the resolution in the games and settings you use. Screen size and viewing distance also affect how useful that extra detail feels: a large screen viewed nearby may make the difference more apparent than a smaller screen viewed from farther away. There is no universal screen-size or distance cutoff established by the cited product and support information.
#1 Best Overall
- Immersive 4K Gaming Display: 32-inch 4K (3840 x 2160) QD-OLED gaming monitor with 240 Hz refresh rate and 0.03 ms (GTG) response time for immersive gaming
- Advanced OLED Care Technology: New ASUS OLED Care Pro functions with Neo Proximity Sensor that precisely detects when the user is away, switching to a black screen to reduce the risk of burn-in
- Professional Color Accuracy: VESA DisplayHDR 400 True Black compliance, 99% DCI-P3 gamut, true 10-bit color, and Delta E < 2 color difference for astonishing HDR performance for photo and video editing
- Uniform Brightness Control: Optional uniform brightness setting ensures consistent luminance levels across the entire display
- Intuitive Monitor Management: DisplayWidget Center allows users to access OLED Care functions, as well as adjust monitor settings with a mouse
Prioritize refresh rate when high-rate play matters most
A higher refresh rate can be useful when your device and game can supply a matching output mode. If you play titles that support high refresh rates, check the game’s supported modes as well as the monitor’s rating. A monitor’s maximum refresh rate is a capability, not a promise about the frame rate a game will render.
Choose the mode your full setup can use
Compare the monitor’s refresh rate at the resolution you plan to play—not just the largest number printed on its product page. Your console or PC, the connection and ports, and the game all need to support the intended mode. The cited examples illustrate different combinations, not a controlled comparison: LG’s OLED example is 4K at 120 Hz (up to 138 Hz overclocked), while PlayStation’s 27-inch monitor is QHD at up to 240 Hz. The latter is an IPS monitor, not a 4K OLED alternative; its specifications are listed on the PlayStation 27-inch Gaming Monitor page.
Rank #2
- 32" 4K UHD Glossy OLED Display - Experience ultra-sharp visuals and lifelike color on a stunning 32-inch 4K UHD (3840 x 2160) glossy OLED display. Every detail pops with depth and vibrancy, bringing your favorite games and content to life.
- Bright OLED Gaming - This UltraGear features Micro Lens Array+ technology. So with a typical brightness of 275 nits, this monitor is brighter than previous UltraGear OLED gaming displays and has improved viewing angles.
- VESA DisplayHDR True Black 400 & 1.5M:1 Contrast Ratio - VESA DisplayHDR True Black 400 certified with upt to DCI-P3 98.5% color gamut means this monitor meets industry standards for brightness as well as deep, rich black color expression. With a 1.5M:1 contrast ration, the benefit for gaming impeccable color and image detail in dark scenes for a stunning visual experience.
- 32" UHD OLED Brilliance with 165Hz of Game-Changing Speed - Experience ultra-smooth, tear-free gameplay with up to 165Hz on a bright 32” Glossy UHD OLED display. React instantly, spot every detail, and outpace your opponents in every frame with outrageous speed and clarity.
- Leave Lag Behind with 0.03ms Response Time - Enjoy smoother scenes with less lag or ghosting thanks to LG UltraGear OLED's nearly instantaneous 0.03ms (GtG) response time.
Check compatibility before buying
- Resolution and refresh rate together: Confirm the display supports the resolution and refresh rate you actually intend to use at the same time.
- Device output: Check your console or PC’s supported video output and its available ports.
- Game support: Look up whether the games you play support the desired resolution, refresh rate, or performance mode.
- Connection and ports: Verify that the monitor’s input and the cable or intermediary equipment in your signal path can carry the target mode.
- VRR: Confirm variable refresh rate (VRR) support across the display, device, connection, and game. VRR adjusts the display’s refresh rate in real time to match the connected device’s output; actual support depends on the display and the rest of the setup.
- Practical fit: Consider screen size, viewing distance, available space, and whether your device can drive the modes you care about.
What PS5 supports for 4K and 120 Hz
Sony states that PS5 supports HDMI 2.1 and 4K/120 Hz video output. The console detects connected display capabilities, but Sony notes that the display and game must support the selected mode. A compatible monitor therefore does not make every PS5 game render at 4K and 120 frames per second. Sony also provides VRR settings, with results depending on the connected display. See Sony’s PS5 resolution guide for current settings and compatibility details.
Do these 3 things before closing this tab:
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 troubleshoot PS5 4K/120 Hz output
If the expected mode is unavailable or does not work, check the signal path and console settings before replacing equipment. Sony recommends verifying display capability, the HDMI port and cable, firmware, any receiver or other intermediary, and the PS5’s resolution and video-transfer-rate settings.
Rank #3
- 31.5" UHD (3840 x 2160) QD-OLED panel
- High 240Hz refresh rate, ultra-low 0.03ms GtG response time
- 1.07 billion colours (10-bit) with incredible gamut (DCI-P3 99%) & accuracy (ΔE ≤2)
- VESA DisplayHDR True Black 400 certified
- OLED Care 2.0 & MSI Gaming Intelligence AI
- Confirm the monitor supports the mode. Check its specifications for 4K/120 Hz—not just 4K or a high refresh-rate figure at another resolution.
- Check the HDMI port and signal path. Use a monitor port that supports the target mode. If a receiver or other device sits between the PS5 and display, connect the console directly to the monitor to check whether that equipment is limiting the signal.
- Check the cable. Sony identifies the cable included with the PS5 or an Ultra High-Speed HDMI cable rated for 4K/120 Hz as appropriate options. A new cable is not automatically necessary if the supplied one and current setup work.
- Update firmware. Check for available firmware updates for the display and any intermediary equipment.
- Review PS5 video settings. In Settings > Screen and Video > Video Output, check the resolution, 120 Hz Output, VRR, and Video Transfer Rate options. The 120 Hz output option applies to compatible displays and games. Sony notes that changing the transfer-rate setting can limit some output modes.
How PC buyers should check their setup
For PC, verify that the graphics card’s output, the chosen connection, the monitor’s input, and the game settings support the resolution and refresh rate you want. The model’s maximum refresh-rate figure alone cannot establish what a particular PC or game will deliver. The cited sources do not specify universal PC hardware requirements or game-by-game performance, so check the specifications for your actual components and titles.
Independent reader supportYour contribution helps us test, update, and keep practical guides available for everyone.Use product examples as specifications, not rankings
Two official listings show why resolution and refresh rate should be evaluated together. LG’s 48GQ900-B is a 4K OLED example; PlayStation’s 27-inch monitor pairs QHD with a higher maximum refresh rate. They are different products with different panel types and resolutions, not like-for-like test results. LG also says graphics hardware supporting HDMI 2.1 is required for 120 Hz VRR on the 48GQ900-B. Product details can vary by region or change over time, so check the manufacturer listing for the exact model and market before purchase.
Quick Recap
Best Value
- Dual Mode Display Technology: 32-inch 4K (3840 x 2160) TrueBlack Glossy WOLED gaming monitor with versatile dual mode (4K@240Hz, FHD@480Hz)
- TrueBlack Glossy Panel: Exclusive new TrueBlack Glossy panel provides a zero-haze surface and exceptionally sharp imagery
- ASUS OLED Care Pro with Neo Proximity Sensor: Precisely detects when the user is away and switches to a black screen to reduce the risk of burn-in
- DisplayWidget Center Software: Allows users to easily access OLED Care Pro functions and adjust monitor settings using a mouse
- Professional Color Accuracy: VESA DisplayHDR 400 True Black compliance, 99% DCI-P3 gamut, true 10-bit color, and Delta E < 2 color difference for astonishing HDR performance for photo and video editing
Rank #4
- High-Performance Display Specifications: 26.5-inch 4K (3840 x 2160) QD-OLED gaming monitor with 240Hz refresh rate and 0.03ms response time for ultra-smooth gameplay
- Advanced 4th-Generation QD-OLED Technology: Latest QD-OLED technology delivers sharper imagery and crystal-clear text, with a longer lifespan over previous-gen OLEDs
- OLED Anti-Flicker 2.0 Technology: Includes a new luminance compensation algorithm that reduces flicker by 20% compared to previous-gen panels, ensuring comfortable viewing
- ASUS OLED Care Pro with Neo Proximity Sensor: New functions with Neo Proximity Sensor that precisely detects when the user is away, switching to a black screen to reduce the risk of burn-in
- Professional-Grade Color Accuracy: VESA DisplayHDR 400 True Black compliance, 99% DCI-P3 gamut, true 10-bit color, and Delta E < 2 color difference for astonishing HDR performance for photo and video editing
| Official product example | Panel and resolution | Refresh rate | Other relevant listed support |
|---|---|---|---|
| LG UltraGear 48GQ900-B | 48-inch OLED; 3840 × 2160 (4K UHD) | 120 Hz; up to 138 Hz overclocked | HDMI 2.1; VRR up to 120 Hz (138 Hz overclocked); LG says HDMI 2.1-capable graphics hardware is required for 120 Hz VRR. LG listing. |
| PlayStation 27-inch Gaming Monitor | IPS; 2560 × 1440 (QHD) | Up to 240 Hz | VRR; PlayStation lists compatible PS5 games up to 120 Hz and compatible PC and Mac devices up to 240 Hz. PlayStation listing. |
Product prices and availability are accurate as of the date/time indicated and are subject to change. Any price and availability information displayed on Amazon at the time of purchase will apply.
