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ASUS ROG Strix XG309CM

Global manufacturer specification

Screen diagonal
29.5 in
Native resolution
2560x1080
Maximum refresh rate
220 Hz

ROG Strix XG309CM monitor, identified in the ASUS Global catalogue. Specifications below retain the manufacturer’s configuration and interface conditions.

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THE ACTUAL PRODUCT
ASUS ROG Strix XG309CM official product image
Official product image · Image source detailsProduct imagery does not establish a retailer’s bundle or condition.
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Specifications checked 17 Oct 2026Manufacturer specifications, not a hands-on test.

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Key strengths

Published monitor interfaces and configuration are available from the exact-model ASUS specification source.

Manufacturer source
The checks that matter.

Before you buy

Compatibility and maximum operating modes depend on the source’s stated hardware, firmware and connection requirements; manufacturer figures are not independent measurements.

Manufacturer source
Every specification. With its source.

Full specifications

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Exact configuration: Global manufacturer specification · ROG Strix XG309CM

15 specifications in 7 groups. Values are manufacturer specifications unless a row says “Measured result” or “Calculated from cited specifications”.

Screen & panel

5 items
Screen diagonal
29.5 inSource
Native resolution
2560x1080Source
Panel technology
Fast IPSSource
Aspect ratio
21:9Source
Panel coating
Anti-GlareSource

Refresh & response

3 items
Maximum refresh rate
220 Hz

Manufacturer-listed maximum; input-specific signal-frequency restrictions, overclocking and source/cable requirements remain as shown in the specifications. Digital Signal Frequency : USB-C, DisplayPort: 30KHz to 250KHz(H)/48Hz to 220Hz(V)(OC) HDMI:30KHz to 230KHz(H)/48Hz to 200Hz(V)(OC)

Source
Response-time claim
1ms(GTG)Source
Input-specific signal modes
Digital Signal Frequency: USB-C, DisplayPort: 30KHz to 250KHz(H)/48Hz to 220Hz(V)(OC) HDMI:30KHz to 230KHz(H)/48Hz to 200Hz(V)(OC)Source

Colour, brightness & HDR

3 items
Declared typical brightness
300 cd/m²

Manufacturer typical claim; not measured luminance or HDR peak. Original: 300cd/㎡

Source
Contrast-ratio claim
1000:1Source
Display colours
16.7MSource

Inputs & connections

1 item
Inputs and versions
DisplayPort 1.2 x 1 HDMI (v2.0)x 1 USB-Cx 1 (DP Alt Mode) Earphone jack: Yes USB Hub: 2x USB 3.2 Gen 1 Type-A USB-C Power Delivery: 15WSource

Stand & mounting

1 item
Stand and mounting details
1/4" Tripod Socket: Yes Tilt: Yes (+20° ~ -5°) Swivel: Yes (+25° ~ -25°) Height Adjustment: 0~110mm VESA Wall Mounting: 100x100mm Lighting effect (Aura): Aura Sync Kensington Lock: YesSource

Size, weight & build

1 item
Dimensions with supplied configuration
Phys. Dimension with stand (W x H x D): 70.73 x 48.61 x 26.49 cm (27.85" x 19.14" x 10.43")

Manufacturer estimated dimensions; original ordering, units and regional qualifications retained. See source for stand configuration.

Source

Audio

1 item
Audio and speaker specification
Speaker:Yes(2Wx2)Source
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