Product Overview

Designed for uncompromised immersion, the AGON PRO AG346UCD combines a 34" 21:9 QD-OLED panel with an 1800R curve, delivering inky blacks, wide color, and ultra-fast response. It drives WQHD 3440×1440 up to 175Hz via DisplayPort with AdaptiveSync, while the ergonomic stand, USB 3.2 hub, and dual speakers make daily use effortless.

Key Features

• 34" UltraWide WQHD (3440×1440) QD-OLED • 21:9 • 1800R curvature
• Up to 175Hz (DP) • 0.03ms GtG response • AdaptiveSync (VRR 48–175Hz)
• VESA DisplayHDR™ True Black 400 with per-pixel dimming
• Wide color: ~99% DCI-P3 • ~98% Adobe RGB • ~139% sRGB (CIE 1976)
• I/O: 1× DisplayPort 1.4 • 2× HDMI 2.0 • USB-B upstream • 3× USB-A 3.2 Gen1 (one fast-charge) • 3.5 mm headphone out
• Speakers: 2×8W • Light FX (RGB) • VESA 100×100
• Ergonomics: height 130 mm • tilt −5° to +25° • swivel ±28°

Specifications

• Static contrast: 1,500,000:1 • Viewing angles: 178°/178°
• Brightness (SDR): 250 nits (APL 100%) • HDR peaks: 450 nits (APL 10%), 1000 nits (APL 3%)
• Pixel density: ~109.7 PPI • 10-bit color (1.07B)
• Max resolution by connector: DP 3440×1440 @ 175Hz • HDMI 3440×1440 @ 100Hz
• Power: 100 W (typ) • 0.5 W (standby) • internal PSU
• Dimensions (W×H×D, with stand): 31.95" × 16.60–21.70" × 11.58" • Net weight (excl. package): 23.85 lb

Technical Details

QD-OLED combines quantum-dot color with self-emissive pixels for perfect blacks and high contrast. Use DisplayPort for the full 175Hz mode; HDMI supports up to 100Hz at 3440×1440. Connect the USB-B upstream to enable the 3-port USB hub and fast-charge port. PiP/PbP, Low Blue Light, Flicker-Free, Shadow Control, and Crosshair utilities round out gaming and creator workflows.

Highlights

• True Black OLED contrast for cinematic dark-scene detail
• Ultra-smooth motion with 175Hz VRR and near-instant 0.03ms response
• Ergonomic stand, RGB Light FX, speakers, and tidy cabling for clean setups

Why this is the best choice

If you want gaming that feels truly immersive and effortlessly smooth, the AOC AGON PRO AG346UCD delivers. Its 34-inch UltraWide 3440×1440 canvas stretches your field of view so you see more of the track, the map, and the world—ideal for racers, sims, and open‑world adventures. The curved QD‑OLED panel is the star: you get inky blacks, high contrast, and vibrant color without the haloing typical of many LCDs, so dark scenes retain fine shadow detail while bright elements pop. Pair that visual richness with a 175Hz refresh and a near‑instant 0.03ms pixel response, and motion stays crisp in fast firefights or sweeping camera pans. AdaptiveSync support reduces tearing and stutter across a wide range of frame rates, keeping inputs feeling responsive and consistent.

Beyond games, the expansive 21:9 space makes everyday tasks feel easier—two apps side by side, a longer timeline in your editor, or a wider view in spreadsheets. A built‑in USB 3.2 hub keeps peripherals within reach, and integrated speakers handle casual listening or quick calls. It’s a superb blend of image quality, speed, and convenience in a single display. One caveat: as with most OLEDs, long‑static elements (HUDs, taskbars) can benefit from mindful use to minimize potential image retention, and peak full‑screen brightness may not match the brightest LCDs—small trade‑offs for the contrast and motion clarity you gain.

Material Quality

A sturdy column stand with smooth tilt/height/swivel keeps the curved panel stable. The anti-reflection treatment tempers glare while preserving OLED clarity; the chassis adds RGB Light FX without sacrificing a clean look.

Design and Functionality

Three-sided frameless bezels focus attention; VESA 100×100 supports arm mounting. The integrated USB 3.2 hub (with fast charge) and dual 8W speakers reduce desktop clutter for streamlined setups.

Performance and Effectiveness

OLED’s per-pixel lighting eliminates blooming and smear. At 175Hz with AdaptiveSync, fast pans and flick shots remain crisp, while wide color (DCI-P3/Adobe RGB) benefits photo/video tasks.

Innovation or Exclusive Features

VESA DisplayHDR™ True Black 400 delivers deep black levels and highlight pop that VA/IPS cannot match. Gaming aids like Low Input Lag, Shadow Control, and on-screen crosshair enhance competitive focus.

Value for Money

By pairing QD-OLED image quality with 175Hz speed and a full ergonomic spec, it replaces the need for separate gaming and creator monitors—maximizing utility from one ultrawide.

Comparison with Competitors

Versus VA ultrawides, blacks are vastly deeper with instant response; compared to IPS, it avoids glow and smear. Against higher-priced OLEDs, it retains 175Hz, TB400 HDR, and a USB hub at a more approachable tier.

Warranty and Support

Backed by AOC’s regional 3-year warranty (terms vary) and firmware update support (OTA), plus downloadable manuals and calibration reports included in the box.

Maintenance and Ease of Use

Use DP for 175Hz; enable pixel refresh scheduling to maintain OLED panel health. Keep the anti-reflection surface clean with a soft, dry microfiber cloth.

Final Verdict

If you want true-black OLED immersion with esports-ready speed and creator-friendly color in a single 34" ultrawide, the AG346UCD is a standout choice.

• ✅ Pros: QD-OLED blacks and 0.03ms response, 175Hz VRR, HDR True Black 400, wide color (DCI-P3/Adobe RGB), USB 3.2 hub, dual speakers, full ergonomics
• ⚠️ Cons: OLED care (pixel refresh) required; HDMI tops out at 100Hz at 3440×1440
• 🎯 Unique: Rare mix of QD-OLED + 175Hz + TB400 HDR with speakers, RGB Light FX, and a 3-port USB hub in a 34" 21:9 curve