240Hz, QHD, 45 inch OLED gaming monitor from LG gets huge discount in limited time Amazon deal
Table of Contents
The LG UltraGear 45GX900A-B combines a huge 45-inch 800R curved OLED monitor panel with 240Hz performance, a 0.03ms response time, FreeSync Premium Pro, G-SYNC compatibility, and excellent OLED contrast to create an exceptionally immersive gaming display. Its 3440×1440 resolution is relatively manageable for modern GPUs and helps make high-refresh gaming more achievable, although the enormous screen size means pixel density is noticeably lower than smaller QHD or 4K alternatives. For gamers who value physical scale, deep OLED blacks, ultrawide immersion, and speed above maximum desktop sharpness, the 45GX900A-B has an unusually compelling combination of features.
The 45GX900A-B uses a 3440×1440 OLED panel with a 21:9 aspect ratio. This provides approximately 4.95 million pixels, around 34% more than standard 2560×1440 QHD but substantially fewer than the 8.29 million pixels rendered by 3840×2160 4K. That resolution represents an interesting compromise for gaming. The display provides considerably more horizontal space than conventional QHD while placing much less rendering load on the GPU than 4K. This matters because the panel can operate at up to 240Hz. Achieving 200fps or more at 3440×1440 is considerably more realistic on high-end hardware than doing so at 4K, allowing the monitor’s high refresh rate to be properly exploited across a wider selection of games.
Have a gander below for additional information on the various specifications, or see the foot of this page for alternative offers on gaming monitors.
Latest tech deals.
- AMD Ryzen™ 9 9900X 12-Core - was $499 now $328
- CORSAIR 4000D PC Case - was $124.99 now $75.99
- Hisense 65" Class E6SR - was $549 now $377.99
- Apple 2026 MacBook Air - was $1,999 now $1,799
- Skytech Gaming PC Desktop (9850X3d) - was $4,299 now $3,799
- Apple Magic Mouse - was $79 now $59
- MSI Prestige 16 Flip - was $2,149 now $1,899
- Kotin 9700X Gaming PC - was $2,399 now $2,199
Prices correct as of October 9th, 2026.
What we like about this LG UltraGear 45GX900A-B monitor
Huge 45-inch OLED panel with an aggressive 800R curve
The LG UltraGear 45GX900A-B combines an expansive 44.5-inch OLED panel with a 21:9 aspect ratio and steep 800R curvature. The result is an exceptionally immersive ultrawide display that fills more of your peripheral vision than a conventional flat monitor, making it particularly well suited to racing games, flight simulators, RPGs, and cinematic single-player titles.
240Hz refresh rate and 0.03ms response time
Despite its enormous panel, the 45GX900A-B supports refresh rates of up to 240Hz alongside a quoted 0.03ms GtG response time. OLED’s extremely fast pixel transitions complement the high refresh rate particularly well, helping reduce ghosting and maintain excellent motion clarity during fast gameplay.
Excellent OLED contrast and HDR performance
The self-emissive OLED panel delivers a quoted 1,500,000:1 contrast ratio, DisplayHDR True Black 400 certification, and peak brightness of up to 1,300 nits under LG’s specified 1.5% APL condition. Individual pixel control produces genuinely deep blacks without the blooming associated with conventional Mini-LED local dimming.
FreeSync Premium Pro and G-SYNC compatibility
Support for both AMD FreeSync Premium Pro and NVIDIA G-SYNC Compatible variable refresh rate technology makes the monitor suitable for Radeon and GeForce systems. VRR synchronizes the display with the GPU’s frame delivery, reducing tearing and stuttering when frame rates fluctuate.
USB-C with 65W Power Delivery
Alongside HDMI 2.1 and DisplayPort 1.4, LG provides USB Type-C connectivity with up to 65W Power Delivery. This makes the 45GX900A-B considerably more versatile as an everyday workstation display, since compatible laptops can transmit video and receive power through a single USB-C connection.
Who should buy this OLED gaming monitor deal?
The LG UltraGear 45GX900A-B is aimed at gamers who prioritize immersion, speed, and OLED image quality over maximum pixel density. Its combination of a massive 45-inch panel, 800R curvature, 21:9 aspect ratio, and 240Hz refresh rate is particularly compelling for racing games, simulators, RPGs, shooters, and other titles with good ultrawide support. Its 3440×1440 resolution is also substantially easier for a graphics card to drive than 4K or Dual 4K ultrawide monitors. That makes reaching high frame rates closer to the panel’s 240Hz ceiling more realistic without sacrificing the expansive ultrawide experience.
More gaming monitor deals
About the Author