MONITORS · YOUR NEXT FACE-OFF

ASUS ROG Strix XG249CM vs ASUS ROG Strix XG309CM

Real specs. Clear sources.Exact models · UK & US buying links

Compared products

YOUR FIRST CHOICE

ASUS ROG Strix XG249CM

Global manufacturer specification · ROG Strix XG249CM

Full product profile Official image

Exact model & source notes

ROG Strix XG249CM monitor, identified in the ASUS Global catalogue. Specifications below retain the manufacturer’s configuration and interface conditions.

Specifications checked 17 Oct 2026.

Amazon links open search results. Check the exact variant, current price and availability with the retailer.

Manufacturer specifications

WHICH SUITS YOU?

Choose the XG249CM for

Higher stated maximum refresh rate: 270 Hz vs 220 Hz
Smaller stated screen diagonal: 23.8 in vs 29.5 in
A 16:9 screen

Choose the XG309CM for

Higher stated native resolution: 2560x1080 vs 1920x1080
Larger stated screen diagonal: 29.5 in vs 23.8 in
A 21:9 screen

Built from verified specifications that differ. Not a rating or a recommendation.

See the 9 verified differences

THE CONTENDER

ASUS ROG Strix XG309CM

Global manufacturer specification · ROG Strix XG309CM

Full product profile Official image

Exact model & source notes

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

Specifications checked 17 Oct 2026.

Amazon links open search results. Check the exact variant, current price and availability with the retailer.

Manufacturer specifications

XG249CM UK & US retailers

UK & US price history: no verified listing yet

XG309CM UK & US retailers

UK & US price history: no verified listing yet

Search links open retailer results, not a matched listing; eBay listings are checked daily. As an Amazon Associate I earn from qualifying purchases. As an eBay Partner, we may be compensated if you make a purchase.

THE DIFFERENCES, MADE VISIBLE

Visual facts

Differences first. Select a topic for its graphic, sources and conditions.

How to read this comparison

Manufacturer facts for the exact models shown. Not a quality rating or a test result.
“Different” means the known values differ, not that one is better.
Missing or conflicting evidence is marked and never counts as a difference. Source chips hold each fact’s sources and conditions.

SPECIFICATIONS SIDE BY SIDE7 topics

SELECTED TOPIC

01 / 07

Native resolution

Check the exact configuration and source conditions for your use.

ASUS ROG Strix XG249CM1920x1080

Manufacturer specification

Source 1

ASUS ROG Strix XG309CM2560x1080

Manufacturer specification

Source 1

Explore the full specifications

Match the monitor to the connection. Refresh limits depend on the input, cable and source device. Confirm the exact regional ports, stand adjustment and mount. Manufacturer response-time methods such as MPRT and GtG are different; neither the image nor these figures establish an independent motion or colour-quality test.

WHAT CHANGES BETWEEN THEM?

Key differences

Full specifications ↓

9 verified differences, most decision-relevant first. 7 are also drawn in Visual facts above. Missing information stays separate.

Native resolution

In Visual facts

ASUS ROG Strix XG249CM1920x1080

ASUS ROG Strix XG309CM2560x1080

Sources

ASUS ROG Strix XG249CM

Manufacturer specification

ASUS ROG Strix XG249CM — official Global technical specifications

ASUS ROG Strix XG309CM

Manufacturer specification

ASUS ROG Strix XG309CM — official Global technical specifications

Check the exact configuration and source conditions for your use.

Maximum refresh rate

In Visual facts

ASUS ROG Strix XG249CM270 Hz

ASUS ROG Strix XG309CM220 Hz

Sources

ASUS ROG Strix XG249CM

Manufacturer specification · Manufacturer-listed maximum; input-specific signal-frequency restrictions, overclocking and source/cable requirements remain as shown in the specifications. Digital Signal Frequency : HDMI:31~274 KHz (H) / 48~240 Hz (V) USB-C, DisplayPort: 31~300 KHz (H) / 48~270 Hz (V)

ASUS ROG Strix XG249CM — official Global technical specifications

ASUS ROG Strix XG309CM

Manufacturer specification · 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)

ASUS ROG Strix XG309CM — official Global technical specifications

Check the exact configuration and source conditions for your use.

Screen diagonal

In Visual facts

ASUS ROG Strix XG249CM23.8 in

ASUS ROG Strix XG309CM29.5 in

Sources

ASUS ROG Strix XG249CM

Manufacturer specification

ASUS ROG Strix XG249CM — official Global technical specifications

ASUS ROG Strix XG309CM

Manufacturer specification

ASUS ROG Strix XG309CM — official Global technical specifications

Check the exact configuration and source conditions for your use.

Stand and mounting details

In Visual facts

ASUS ROG Strix XG249CMTilt: Yes (+20° ~ -5°) Swivel: Yes (+25° ~ -25°) Pivot: Yes (0° ~ 90° Clockwise) Height Adjustment: 0~100mm VESA Wall Mounting: 100x100mm Kensington Lock: Yes

ASUS ROG Strix XG309CM1/4" 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: Yes

Sources

ASUS ROG Strix XG249CM

Manufacturer specification

ASUS ROG Strix XG249CM — official Global technical specifications

ASUS ROG Strix XG309CM

Manufacturer specification

ASUS ROG Strix XG309CM — official Global technical specifications

Compare the supplied stand and mounting requirements. These affect positioning and desk fit; they do not establish panel quality. Check any separately stated limits or conflicting dimensions.

Aspect ratio

In Visual facts

ASUS ROG Strix XG249CM16:9

ASUS ROG Strix XG309CM21:9

Sources

ASUS ROG Strix XG249CM

Manufacturer specification

ASUS ROG Strix XG249CM — official Global technical specifications

ASUS ROG Strix XG309CM

Manufacturer specification

ASUS ROG Strix XG309CM — official Global technical specifications

Check the exact configuration and source conditions for your use.

Audio and speaker specification

In Visual facts

ASUS ROG Strix XG249CMSpeaker:No

ASUS ROG Strix XG309CMSpeaker:Yes(2Wx2)

Sources

ASUS ROG Strix XG249CM

Manufacturer specification

ASUS ROG Strix XG249CM — official Global technical specifications

ASUS ROG Strix XG309CM

Manufacturer specification

ASUS ROG Strix XG309CM — official Global technical specifications

Check the exact configuration and source conditions for your use.

Show 3 more verified differences

Declared typical brightness

In Visual facts

ASUS ROG Strix XG249CM350 cd/m²

ASUS ROG Strix XG309CM300 cd/m²

Sources

ASUS ROG Strix XG249CM

Manufacturer specification · Manufacturer typical claim; not measured luminance or HDR peak. Original: 350cd/㎡

ASUS ROG Strix XG249CM — official Global technical specifications

ASUS ROG Strix XG309CM

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

ASUS ROG Strix XG309CM — official Global technical specifications

Check the exact configuration and source conditions for your use.

Input-specific signal modes

ASUS ROG Strix XG249CMDigital Signal Frequency: HDMI:31~274 KHz (H) / 48~240 Hz (V) USB-C, DisplayPort: 31~300 KHz (H) / 48~270 Hz (V)

ASUS ROG Strix XG309CMDigital Signal Frequency: USB-C, DisplayPort: 30KHz to 250KHz(H)/48Hz to 220Hz(V)(OC) HDMI:30KHz to 230KHz(H)/48Hz to 200Hz(V)(OC)

Sources

ASUS ROG Strix XG249CM

Manufacturer specification

ASUS ROG Strix XG249CM — official Global technical specifications

ASUS ROG Strix XG309CM

Manufacturer specification

ASUS ROG Strix XG309CM — official Global technical specifications

Check the exact configuration and source conditions for your use.

Dimensions with supplied configuration

ASUS ROG Strix XG249CMPhys. Dimension with stand (W x H x D): 54.00 x 48.80 x 23.80 cm (21.26" x 19.21" x 9.37")

ASUS ROG Strix XG309CMPhys. 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")

Sources

ASUS ROG Strix XG249CM

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

ASUS ROG Strix XG249CM — official Global technical specifications

ASUS ROG Strix XG309CM

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

ASUS ROG Strix XG309CM — official Global technical specifications

A size or weight trade-off; it does not establish the better product.

6 shared fields have the same recorded value.

WHAT EACH CHOICE ASKS OF YOU

What it brings and what to check

ASUS ROG Strix XG249CM

What it brings

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

What to check

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

ASUS ROG Strix XG309CM

What it brings

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

What to check

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

COMPARE THE DETAILS

Full specifications

How we verify

Differences only

15 of 15 specifications Sources in each row

Source-backed specifications for ASUS ROG Strix XG249CM and ASUS ROG Strix XG309CM
Specification	ASUS ROG Strix XG249CM	ASUS ROG Strix XG309CM

Screen diagonalDifferent Sources ASUS ROG Strix XG249CM Manufacturer specification ASUS ROG Strix XG249CM — official Global technical specifications ASUS ROG Strix XG309CM Manufacturer specification ASUS ROG Strix XG309CM — official Global technical specifications	23.8 in	29.5 in
Native resolutionDifferent Sources ASUS ROG Strix XG249CM Manufacturer specification ASUS ROG Strix XG249CM — official Global technical specifications ASUS ROG Strix XG309CM Manufacturer specification ASUS ROG Strix XG309CM — official Global technical specifications	1920x1080	2560x1080
Panel technology Sources ASUS ROG Strix XG249CM Manufacturer specification ASUS ROG Strix XG249CM — official Global technical specifications ASUS ROG Strix XG309CM Manufacturer specification ASUS ROG Strix XG309CM — official Global technical specifications	Fast IPS	Fast IPS
Aspect ratioDifferent Sources ASUS ROG Strix XG249CM Manufacturer specification ASUS ROG Strix XG249CM — official Global technical specifications ASUS ROG Strix XG309CM Manufacturer specification ASUS ROG Strix XG309CM — official Global technical specifications	16:9	21:9
Panel coating Sources ASUS ROG Strix XG249CM Manufacturer specification ASUS ROG Strix XG249CM — official Global technical specifications ASUS ROG Strix XG309CM Manufacturer specification ASUS ROG Strix XG309CM — official Global technical specifications	Anti-Glare	Anti-Glare
Contrast-ratio claim Sources ASUS ROG Strix XG249CM Manufacturer specification ASUS ROG Strix XG249CM — official Global technical specifications ASUS ROG Strix XG309CM Manufacturer specification ASUS ROG Strix XG309CM — official Global technical specifications	1000:1	1000:1
Display colours Sources ASUS ROG Strix XG249CM Manufacturer specification ASUS ROG Strix XG249CM — official Global technical specifications ASUS ROG Strix XG309CM Manufacturer specification ASUS ROG Strix XG309CM — official Global technical specifications	16.7M	16.7M
Declared typical brightnessDifferent Sources ASUS ROG Strix XG249CM Manufacturer specification · Manufacturer typical claim; not measured luminance or HDR peak. Original: 350cd/㎡ ASUS ROG Strix XG249CM — official Global technical specifications ASUS ROG Strix XG309CM Manufacturer specification · Manufacturer typical claim; not measured luminance or HDR peak. Original: 300cd/㎡ ASUS ROG Strix XG309CM — official Global technical specifications	350 cd/m²	300 cd/m²

Maximum refresh rateDifferent Sources ASUS ROG Strix XG249CM Manufacturer specification · Manufacturer-listed maximum; input-specific signal-frequency restrictions, overclocking and source/cable requirements remain as shown in the specifications. Digital Signal Frequency : HDMI:31~274 KHz (H) / 48~240 Hz (V) USB-C, DisplayPort: 31~300 KHz (H) / 48~270 Hz (V) ASUS ROG Strix XG249CM — official Global technical specifications ASUS ROG Strix XG309CM Manufacturer specification · 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) ASUS ROG Strix XG309CM — official Global technical specifications	270 Hz	220 Hz
Response-time claim Sources ASUS ROG Strix XG249CM Manufacturer specification ASUS ROG Strix XG249CM — official Global technical specifications ASUS ROG Strix XG309CM Manufacturer specification ASUS ROG Strix XG309CM — official Global technical specifications	1ms(GTG)	1ms(GTG)
Input-specific signal modesDifferent Sources ASUS ROG Strix XG249CM Manufacturer specification ASUS ROG Strix XG249CM — official Global technical specifications ASUS ROG Strix XG309CM Manufacturer specification ASUS ROG Strix XG309CM — official Global technical specifications	Digital Signal Frequency: HDMI:31~274 KHz (H) / 48~240 Hz (V) USB-C, DisplayPort: 31~300 KHz (H) / 48~270 Hz (V)	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)

Inputs and versions Sources ASUS ROG Strix XG249CM Manufacturer specification ASUS ROG Strix XG249CM — official Global technical specifications ASUS ROG Strix XG309CM Manufacturer specification ASUS ROG Strix XG309CM — official Global technical specifications	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: 15W	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: 15W
Audio and speaker specificationDifferent Sources ASUS ROG Strix XG249CM Manufacturer specification ASUS ROG Strix XG249CM — official Global technical specifications ASUS ROG Strix XG309CM Manufacturer specification ASUS ROG Strix XG309CM — official Global technical specifications	Speaker:No	Speaker:Yes(2Wx2)

Dimensions with supplied configurationDifferent Sources ASUS ROG Strix XG249CM Manufacturer specification · Manufacturer estimated dimensions; original ordering, units and regional qualifications retained. See source for stand configuration. ASUS ROG Strix XG249CM — official Global technical specifications ASUS ROG Strix XG309CM Manufacturer specification · Manufacturer estimated dimensions; original ordering, units and regional qualifications retained. See source for stand configuration. ASUS ROG Strix XG309CM — official Global technical specifications	Phys. Dimension with stand (W x H x D): 54.00 x 48.80 x 23.80 cm (21.26" x 19.21" x 9.37")	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")
Stand and mounting detailsDifferent Sources ASUS ROG Strix XG249CM Manufacturer specification ASUS ROG Strix XG249CM — official Global technical specifications ASUS ROG Strix XG309CM Manufacturer specification ASUS ROG Strix XG309CM — official Global technical specifications	Tilt: Yes (+20° ~ -5°) Swivel: Yes (+25° ~ -25°) Pivot: Yes (0° ~ 90° Clockwise) Height Adjustment: 0~100mm VESA Wall Mounting: 100x100mm Kensington Lock: Yes	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: Yes

First product manufacturer source Second product manufacturer source

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Screen diagonal: 24.5 in
Native resolution: 1920x1080

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AOC 25G4ZR

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Prices & product profile

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Prices & product profile

Each record represents an explicitly checked model and configuration. Original import: 5 Sept 2026; this is not its verification date. This is not a list of current offers or a popularity ranking.