LG 27GX790B-B 27” Ultragear QHD (3440 x 1440) OLED Gaming Monitor, Dual Mode (QHD 540Hz/ HD 720Hz), 0.02ms, TrueBlack 500, NVIDIA G-Sync Compatible, AMD FreeSync Premium Pro, DP 2.1, USB-C, Black | NVIDIA G-Sync Compatible, USB-C, AMD FreeSync Premium Pro, 27' (3440 x 1440), Dual Mode (/HD), 0.02ms, TrueBlack 500
About this product
About this item Outrageous Speed with LG's Brightest OLED Gaming Monitor - Experience the brightness and speed of 4th Gen OLED on a vivid 27" QHD display—engineered for ultra-smooth, tear-free gameplay. With a refresh rate up to 720Hz and lightning-fast 0.02ms response time, you’ll react faster, track every movement with precision, and outpace your opponents frame by frame with astounding brightness, clarity and speed.
Our Brightest, Boldest OLED Gaming Monitor - Powered by UltraGear’s latest OLED with Primary RGB Tandem tech, this is LG’s brightest OLED gaming monitor yet—reaching 335 nits typical brightness for clear visibility in bright scenes. Enhanced APL and reduced ABL keep critical visuals sharp during intense action, while UL Verified Perfect Black and DisplayHDR True Black 500 deliver deep contrast and pinpoint detail.
Next-Gen OLED Brilliance - 4th Gen Primary RGB Tandem OLED reaches 335 nits typical brightness while using less power than previous UltraGear OLED generations. The display's advanced 4-stack RGB structure delivers enhanced contrast, sharper detail, and color precision that stays consistent across every frame.
Dual Mode: QHD 540Hz for Detail or HD 720Hz for Speed - Dual Mode pushes gaming speed to the edge, letting you toggle between QHD resolution at 540Hz or HD at 720Hz from a hotkey. Gain outrageous speed and responsiveness for split-second decisions and competitive domination.
DisplayPort 2.1 Delivers Next-Gen Gaming Speed - DisplayPort 2.1 unlocks ultra-fast data speeds for stable, high-refresh gaming up to 720Hz. USB-C keeps your setup clean with single-cable output, and dual HDMI 2.1 ports connect seamlessly to today’s top consoles. More bandwidth. More clarity. More ways to win.
A Virtually Instantaneous 0.02 Response Time (GtG) - The ultra-fast 0.02 response time (GtG), reducing reverse ghosting and providing fast response time, lets you to enjoy a whole new gaming performance.
NVIDIA G-SYNC Compatible & AMD FreeSync Premium Pro - NVIDIA G-SYNC Compatible and AMD FreeSync Premium Pro deliver smooth, tear-free, low-latency gaming with high refresh rates—so every frame stays fluid and sharp.
UL-Verified for a "Perfect" Visual Experience - UL-verified Perfect Reproduction delivers that actual game content is faithfully rendered on screen, maintaining intended color and detail in both dark and bright environments. Unlike static image-based metrics, this certification reflects real-world content reproduction accuracy.
Deeper Detail with VESA DisplayHDR True Black 500 - Experience breathtaking realism with VESA DisplayHDR True Black 500, delivering nuanced shadow detail and rich black expression—even in the darkest game scenes. A 1.5 million:1 contrast ratio pairs with up to 99.5% (typical), DCI-P3 color gamut and Delta E≤2 color accuracy, to ensure colors are vivid, precise, and true to the creator’s intent—giving gamers and creators alike the confidence to see every frame as it was meant to be seen.
Editor's Take
Amazon-style review snippets and third-party review coverage suggest this LG UltraGear monitor is aimed squarely at competitive PC gamers, with praise for its extremely high refresh rates, OLED contrast, fast response, and overall motion clarity. RTINGS describes it as remarkable for PC gaming, while Tom's Guide highlights the 540Hz-at-1440p and 720Hz-at-720p dual-mode behavior and calls it a serious enthusiast display.
Reddit users discussing the 27GX790B-B commonly focus on responsiveness, smooth gameplay, and unexpectedly good text clarity for an OLED, with one thread noting no text fringing and strong suitability for work plus gaming. Another Reddit discussion frames it as a monitor for esports-focused buyers rather than general-purpose use.
Amazon reviewers appear mixed but generally positive, with a review aggregate snippet pointing to strong brightness, good quality, and the appeal of the very high refresh rate. A smaller review site also notes the premium price but strong performance, reinforcing the idea that value depends on whether the buyer will actually use the monitor’s extreme speed features.
YouTube results include multiple real review videos specifically about the LG 27GX790B-B, which suggests the product is drawing attention from monitor reviewers and enthusiasts.
Price History
📊 Price history chart coming soon — data will appear after a few days of tracking.
Specifications
| Screen Size | 27 |
| Resolution | 1440p |
| Refresh Rate | 540 |
| Panel Type | OLED |
| Curved | No |
| Ultrawide | No |
Product Details
| Aspect Ratio | 16:9 |
| Screen Finish | Matte |
| Contrast Ratio | 1500000:1 |
| Refresh Rate | 720 hertz |
| Display Type | OLED |
| Display Technology | OLED |
| Brightness | 335 candela_per_square_meter |
| Pixel Pitch | 0.23 |
| Color Gamut | 99.5 |
| Picture Quality Enhancement Technology | DisplayHDR TRUE BLACK 500, HDR 10 |
| Screen Size | 27 inches |
| Item Dimensions D x W x H | 8.7"D x 23.8"W x 20.8"H |
| Item Weight | 15 pounds |
| Resolution | QHD Wide 1440p |
| Display Resolution Maximum | 3440 x 1440 pixels |
| Native Resolution | 3440x1440 |
| Connectivity Technology | DisplayPort, HDMI, USB Type A, USB Type C |
| Hardware Connectivity | DisplayPort, HDMI, USB 3.0 Type A, USB Type C |
| Adaptive Sync | FreeSync Premium Pro, G-Sync Compatible |
| Additional Features | Dynamic Action Sync, Height Adjustment, High Dynamic Range, Pivot Adjustment, Swivel Adjustment |
| Specific Uses For Product | Desktop, Entertainment, Gaming |
| Color | Black |
| Compatible Devices | Desktop, Laptop |
| Shape | Flat |
| Brand | LG |
| Model Number | 27GX790B-B.AUS |
| Model Name | 27GX790B-B.AUS |
| Warranty Description | 2 Year Parts and Labor |
| UPC | 195174137055 |
| Manufacturer | LG Electronics Inc. |
| Included Components | Display Port 2.1 Cable, HDMI 2.1 Cable, Monitor, Power Cable |
| Best Sellers Rank | #25,918 in Electronics ( See Top 100 in Electronics ) #672 in Computer Monitors |
| ASIN | B0G5R2QK24 |
| Customer Reviews | 4.2 out of 5 stars |
| Response Time | 0.02 milliseconds |
| Total Number of HDMI Ports | 2 |
| Total Usb Ports | 3 |
| Number of Component Outputs | 3 |
| Total USB 3.0 Ports | 2 |
