In this review, we spent time with the PG34WCDN to see ASUS’ take with the latest Tandem RGB QD-OLED panel technology, both for competitive gaming and everyday use.
On paper, the specs are strong: variable refresh rate support through both AMD FreeSync Premium Pro and NVIDIA G-SYNC Compatible certifications, plus a response time of roughly 0.03 ms. This is an 1800R curved display, which is balanced radius for a 21:9 panel.
Disclosure: ASUS sent the PG34WCDN for review. As usual, the brand has no editorial influence over this piece.
Technical Specifications
The ASUS ROG Swift OLED PG34WCDN offers a 3440 x 1440 resolution at 360 Hz refresh rate. Color accuracy is also a highlight, with factory calibration rated at Delta E below 2 and a dedicated sRGB mode for those who need accurate SDR output.
| Display | |
|---|---|
| Panel Size | 33.94 in |
| Panel/Backlight | QD-OLED |
| Curvature | 1800R |
| Surface Treatment | Anti-Glare |
| Resolution | 3440 x 1440 (21:9) |
| Pixels per Inch | 109.88 |
| Refresh Rate | 360 Hz |
| Variable Refresh Rate | Adaptive-Sync |
| Brightness | 1300 cd/m2 (HDR) |
| Contrast Ratio | 1,500,000:1 |
| Response Time | 0.03 ms (GtG) |
| Color Coverage | 99% sRGB, 135% DCI-P3 |
| Color Depth | 10-bit |
| Connectivity | |
| Display | 2x HDMI 2.1 FRL, DisplayPort 1.4 DSC, USB Type-C (DP-Alt) |
| USB | 3x USB 2.0 Type-A, Type-B , USB Type-C (DP-Alt + PD 90 W) |
| Audio | 3.5 mm (Out) |
| Ergonomics | |
| VESA Mount | 100 x 100 mm |
| Pivot | N/A |
| Swivel | +30°/-30° |
| Tilt | -3°/+20° |
| Lift | 110 mm |
| Eye-care | TÜV Flicker-free, TÜV Low Blue Light |
| Dimensions | |
| Length | 812.8 mm |
| Width | 107.9 mm |
| Height | 373.3 mm |
| Weight | 5.6 kg (without stand) |
Packaging and Accessories
The PG34WCDN arrives in a large box, secured with two-piece molded pulp packaging. Everything is neatly packed, so there’s nothing to worry about when it comes to parts getting damaged during transit.
Scope of delivery are as follows:
- ASUS ROG Swift OLED PG34WCDN monitor
- DisplayPort cable
- HDMI 2.1 UHS cable
- Power adapter
- Power cord
- ROG pouch
- ROG sticker
- USB Type-B cable
- USB Type-C cable
- VESA mount kit
- Documentation
Design, Build and Connectivity
The ASUS ROG Swift OLED PG34WCDN is a 34 inch curved display featuring ROG’s signature tripod base. You don’t have to look closely at the monitor, or behind it, to tell what brand made it.
The back of the PG34WCDN is unmistakably ROG, from the lifting column down to the cooler, control board, and IO housing. It also lights up in RGB, which is a total flex if you plan to place the monitor in an open area.
Display options include dual HDMI 2.1 ports, a DisplayPort 1.4 and a single USB Type-C port that supports DP Alt Mode and 90 W charging. The Type-C port is great for devices such as the ROG Ally and ROG Flow, where a single connection will suffice for both display and power.
Other connectivity options include 3x USB Type-A and a USB Type-B for KVM and data. The PG34WCDN also comes with a 3.5 mm headphone out and a Kensington security port.
Ergonomics
The ASUS ROG Swift OLED PG34WCDN is a 34 inch monitor with a 3440 x 1440 resolution, giving it an above average pixel density of 109.88 PPI. Curvature is at 1800R, which balances everyday use with gaming. If you want a tighter radius, the PG34WCDM is also available, but with a lower refresh rate.
The PG34WCDN’s tripod stand lets you adjust height up to 110 mm, swivel 30 degrees, and tilt from -3 to 20 degrees. Those are generous numbers, but if you need more flexibility, a VESA mount is also an option.
OSD Menu
The PG34WCDN comes with a 5-axis joystick for navigating its OSD, a feature that’s now standard on the latest ROG monitors, along with a 4-layer menu system. The first section you’ll find is the Gaming menu, which is packed with VRR, ELMB, and other gaming-focused options right from the start.
Imaging is where you can adjust monitor brightness, contrast, aspect ratio, and the blue light filter. ASUS Smart Pixel is also located here, an upscaling technology built into the display.
Color is self explanatory, but the six-axis saturation option is useful for dialing in colors precisely alongside a good calibration tool.
Software
The PG34WCDN supports ASUS DisplayWidget Center, which functions as an OSD equivalent from within the OS. It isn’t a 1:1 match with the OSD menus, since ASUS structured the settings differently here, so DisplayWidget offers better utility as a result.
A good example is the OLED care menu. While it resembles what you’d find in the OSD, DisplayWidget provides context for each setting and is easier to adjust than the joystick-driven menu.
The DisplayWidget communicates with the monitor through the display connection, so no extra cables are required.
OSD Presets
The ‘User’ preset is our baseline for the PG34WCDN’s calibration. The sRGB mode is also perfectly usable, along with ASUS’ own color profile, which downloads automatically once the system detects the panel.
| Spyder5 ELITE | OSD Settings | ||||
|---|---|---|---|---|
| Settings | Brightness (cd/m²) | Black Level (%) | Contrast (:) | White Point (K) |
| Scenery | 277.6 | 0.01 | 18760:1 | 6400 |
| Racing | 166.9 | 0.01 | 11280:1 | 6200 |
| Cinema | 217.0 | 0.01 | 14660:1 | 7100 |
| RTS/RPG | 248.6 | 0.01 | 16800:1 | 6300 |
| FPS | 273.9 | 0.01 | 27390:1 | 6300 |
| sRGB Cal | 103.2 | 0.01 | 10320:1 | 6300 |
| MOBA | 257.2 | 0.01 | 25720:1 | 6300 |
| NV | 24.6 | 0.01 | 1660:1 | 6600 |
| User | 224.2 | 0.01 | 15150:1 | 6300 |
OSD settings are as follows:
- Preset = User
- Brightness = 75 (120 cd/m²)
- Contrast = 50
- Color = N/A
- Color Temperature = 6500K
- Gamma = 2.6 (to compensate)
- Uniform Brightness = Off
- Energy Saving = Off
You can request the calibrated ICC profile for the PG34WCDN by email through our contact page. Keep in mind that results may differ between units due to manufacturing tolerances, panel variations, and updates.
Gamut
The PG34WCDN performed well in the SpyderPro color gamut test, achieving a flawless 100% in sRGB, 99% in DCI-P3, and 93% in AdobeRGB.
| SpyderPro | Gamut, Percent (%) | ||||
|---|---|---|---|---|
| Color Space | sRGB | AdobeRGB | DCI-P3 | NTSC |
| Measured | 100% | 93% | 99% | 83% |
Tone Response
Gamma is where the PG34WCDN stumbles, at least on the presets we tested. sRGB Cal mode lands close to 2.2, whereas the other presets are further off, with Gamma 2.6 the only setting near the 2.2 standard. This should be addressable through a future firmware update.
| SpyderPro | Tone Response, Gamma (γ) | ||||||
|---|---|---|---|---|---|---|
| Settings | sRGB Cal | 1.8 | 2.0 | 2.2 | 2.4 | 2.6 |
| Measured | 2.1 | 1.4 | 1.6 | 1.7 | 1.9 | 2.1 |
Brightness and Contrast
The PG34WCDN delivers strong SDR performance, reaching a peak luminance of 326.1 cd/m² at full brightness. Contrast is good as well.
| SpyderPro | Brightness and Contrast, SDR | ||||
|---|---|---|---|---|
| Settings | Brightness (cd/m²) | Black Level (%) | Contrast (:) | White Point (K) |
| 0% | 1.8 | 0.04 | 50:1 | 6400 |
| 25% | 29.1 | 0.04 | 820:1 | 6600 |
| 50% | 94.0 | 0.04 | 1290:1 | 6700 |
| 75% | 217.9 | 0.04 | 1250:1 | 6800 |
| 100% | 326.1 | 0.04 | 1240:1 | 6800 |
The PG34WCDN supports HDR and this is one of its strong points. Maximum peak brightness reaches 1024.76 cd/m² at 1% window size, tapering to 277.67 cd/m² at full window size.
Screen Uniformity
The PG34WCDN scores an average Delta E of 0.54 in SpyderPro’s screen uniformity test, the best color uniformity result we’ve measured on a display panel so far.
Brightness uniformity is excellent as well, delivering a Delta E of 1.1. Nothing to complain here, really.
Color Accuracy
The PG34WCDN delivers professional-grade color accuracy, with a Delta E average of 0.83 across all tested color patches.
Response Time
The PG34WCDN is built for gaming, and it shows. Average visual response rating is 97.04, a result of its excellent perceived response time and minimal RGB overshoot. At this level of performance, enabling ELMB shouldn’t be necessary.
Input Lag
The PG34WCDN has an average total input lag of 2.77 ms, with an actual on-display lag of 1.66 ms. These are esports-worthy results.
Power
The PG34WCDN draws 29.93 W at 0% brightness and rises gradually to 81.36 W at maximum brightness. At our calibrated setting of 75% brightness (120 cd/m²), it uses about 52.41 W.
Final Thoughts
The ASUS ROG Swift OLED PG34WCDN checks nearly every box you’d want from a high-refresh ultrawide. The panel itself is the star here. A 100% sRGB and 99% DCI-P3 gamut, a Delta E average of 0.83, and screen uniformity at 0.54 Delta E are results you’d normally associate with a color-accurate production display, not a 360 Hz gaming monitor. ASUS didn’t have to make QD-OLED this consistent panel to panel, but the numbers suggest they did the work.
On the gaming side, the PG34WCDN backs up its spec sheet. A 2.77 ms total input lag and a 97.04 visual response rating put it firmly in esports territory, and the 360 Hz refresh rate combined with sub-millisecond pixel response gives competitive players little to complain about. HDR performance is also a highlight, with peak brightness above 1000 cd/m² at small window sizes, which is what makes highlights pop in supported games and media.
The rough edge is gamma tracking. Outside of the sRGB Cal and Gamma 2.6 presets, none of the other options land close to the 2.2 standard most content is mastered for. This is one issue ASUS can fix without touching hardware, but as shipped, it means you’ll want to stick to sRGB Cal or manually dial in Gamma 2.6 rather than trust the default presets.
The connectivity on this gaming monitor is impressive, and the addition of a USB Type-C port with Alt-DP and 90W power delivery is a feature I truly appreciate.
Overall, the PG34WCDN is a strong option for anyone who wants OLED image quality without giving up competitive gaming performance. Just be ready to spend a few minutes in the OSD or DisplayWidget Center dialing in gamma before you start using it seriously.
ASUS ROG Swift OLED PG34WCDN $1,299
Product Name: ROG Swift OLED PG34WCDN
Product Description: The ASUS ROG Swift OLED PG34WCDN is a 34 inch curved gaming monitor built around a QD-OLED panel with Tandem RGB technology.
Brand: ASUS
Summary
The ASUS ROG Swift OLED PG34WCDN pairs a 34 inch 3440 x 1440 QD-OLED panel with a 360 Hz refresh rate and 0.03 ms response time. In testing, it delivered excellent color accuracy, near-perfect gamut coverage, outstanding screen uniformity, and esports-level input lag, backed by strong HDR brightness.
Pros
- 100% sRGB and 99% DCI-P3 coverage
- Excellent color accuracy, Delta E average of 0.83
- Outstanding screen and brightness uniformity
- Very low total input lag at 2.77 ms
- Strong HDR peak brightness above 1000 cd/m²
- 360 Hz refresh rate with 0.03 ms response time
- Generous connectivity, including USB Type-C with 90 W power delivery
- Sturdy build with useful height, tilt, and swivel adjustment
Cons
- Gamma tracking is off target on most presets
- No pivot function
