The MSI Optix G321CU is a budget-friendly 4k gaming monitor. It's one of MSI's few 4k 144Hz monitors, and it's the first to have a VA panel instead of an IPS panel found on other models like the MSI Optix MPG321UR-QD. It features a 32-inch screen with a 1500R curve to bring the edges more within your field of vision. It has features you expect to find in most gaming monitors, like variable refresh rate (VRR) support and the full 48 Gbps bandwidth of HDMI 2.1 on both of its HDMI ports. It also has a few extra perks to improve your gaming experience, like different crosshairs available. It doesn't only have features focused on gaming as it has a USB-C port that supports DisplayPort Alt Mode and Picture-in-Picture/Picture-by-Picture modes.
Our Verdict
The MSI G321CU is okay for PC gaming. It has a 144Hz refresh rate, which is fine for casual gaming, but it isn't good enough for competitive gaming. It has low enough input lag for a responsive feel, but it has mediocre motion handling, with noticeable blur and black smearing. It supports all common VRR formats, but there's noticeable VRR flicker with changing frame rates, which is disappointing if your PC can't maintain consistent frame rates. Also, while it has a decent contrast ratio for fairly deep blacks, it lacks a local dimming feature to improve it and fails to make highlights pop in HDR.
- Supports all common VRR formats.
- Low input lag.
- Noticeable smearing with fast-moving objects.
- No local dimming feature.
- Noticeable VRR flicker in dark scenes.
The MSI G321CU is good for console gaming. Thanks to its HDMI 2.1 bandwidth it takes full advantage of gaming consoles, but it doesn't support VRR with 1440p signals with the Xbox Series X|S. It also has a high 4k resolution that delivers detailed images while gaming, but it has limited picture quality without a local dimming feature, and it can't make highlights pop in HDR. It has low input lag for a responsive feel, but motion is mediocre as there's smearing with fast-moving objects.
- HDMI 2.1 bandwidth.
- Low input lag.
- Noticeable smearing with fast-moving objects.
- No local dimming feature.
- Highlights don't pop in HDR.
The MSI G321CU is good for office use. Its large 32-inch screen provides enough space to multitask, and the 4k resolution offers high pixel density and fantastic text clarity. It also has good peak brightness and decent reflection handling if you want to use it in well-lit offices, but it struggles in extremely bright environments. Unfortunately, it has narrow viewing angles, and people viewing from the side see a washed-out image, and it also has terrible ergonomics.
- Sharp text and images.
- Good SDR peak brightness.
- Narrow viewing angles.
- Stand only offers tilt adjustment.
The MSI G321CU is decent for media creation. The 32-inch, 4k screen lets you see more of your work at once with a lot of detail and sharp images. It also displays a wide range of colors in SDR and has good image accuracy, but not all colors are accurate before a full calibration. Unfortunately, it's hard to share your screen with a coworker or client as you can't swivel it, and it has narrow viewing angles that make the image look washed out from the sides.
- Sharp text and images.
- Good SDR peak brightness.
- Good accuracy before calibration.
- Narrow viewing angles.
- Stand only offers tilt adjustment.
- Still needs a full calibration for best accuracy.
The MSI G321CU has okay brightness. Although it gets bright enough to fight glare in most well-lit rooms, it can't make highlights pop against the rest of the image in HDR.
- Good SDR peak brightness.
- Highlights don't pop in HDR.
The MSI G321CU has an unremarkable response time. Although its motion handling is consistent across its VRR range, it has a slow response time with most refresh rates, leading to noticeable black smearing and blur.
- Maintains consistent motion handling across VRR range.
- Noticeable smearing with fast-moving objects.
The MSI G321CU is terrible for HDR. Although it has a decent contrast ratio, it lacks a local dimming feature to further improve the contrast in HDR, and it fails to make colors look vivid.
- No local dimming feature.
- Limited HDR color volume.
The MSI G321CU has decent SDR picture quality. It has a decent contrast ratio that helps it display fairly deep blacks, but there's noticeable backlight bleed in dark scenes.
- Decent native contrast ratio.
- Black uniformity issues.
The MSI G321CU has great color accuracy. Although it has a dedicated sRGB mode with good accuracy before calibration, you still need to calibrate it for the most accurate image. Luckily, it has impressive gray uniformity that keeps the accurate image consistent across the entire screen.
- Good accuracy before calibration.
- Still needs a full calibration for best accuracy.
Performance Usages
Changelog
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Updated Aug 11, 2025:
We clarified the height to the top of the screen on its stand.
- Updated Feb 21, 2025: We've converted this review to Test Bench 2.0.1. This includes a new test result for DisplayPort 2.1 Transmission Bandwidth.
- Updated Apr 17, 2024: Updated text throughout the review according to Test Bench 2.0, mainly in the Verdict and Motion sections.
- Updated Apr 17, 2024: We've converted this review to Test Bench 2.0. This includes new tests for VRR Motion Performance, Refresh Rate Compliance, Cumulative Absolute Deviation (CAD), and VRR Flicker. You can read the full changelog here.
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Differences Between Sizes And Variants
We tested the 32-inch MSI G321CU, the only size available for this monitor. Although other 32-inch, 4k monitors are available from MSI, the results only apply to this monitor.
| Model | Size | Panel Type | Resolution | Refresh Rate | Curve |
|---|---|---|---|---|---|
| G321CU | 32" | VA | 4k | 144Hz | 1500R |
Our unit was manufactured in February 2023; the label is here.
Popular Monitor Comparisons
The MSI G321CU is a decent budget-friendly model that costs less than other 4k gaming monitors, which is useful if you want something for console gaming and don't want to spend a ton of money. However, it doesn't perform nearly as well as the more expensive options, as there's smearing with fast-moving objects, and it has narrow viewing angles. Even its dark room performance is limited compared to other monitors with VA panels, as it has disappointing black uniformity and lacks a local dimming feature. You can get better performance by spending more on the Gigabyte M32U or the Gigabyte M32UC.
See our recommendations for the best 4k 144Hz monitors, the best 4k gaming monitors, and the best 32-inch monitors.
The Gigabyte M32UC is better for gaming than the MSI Optix G321CU. While both monitors have smearing with fast-moving objects, the Gigabyte has less overshoot and improved motion handling, particularly at high refresh rates. The picture quality on the Gigabyte is also better as it gets much brighter, and it has a better contrast ratio. On the other hand, the MSI has the full 48 Gbps bandwidth of HDMI 2.1, while the Gigabyte is limited to 24 Gbps, so your graphics card doesn't need to use compression when sending high-bandwidth signals.
The Acer Nitro XV282K KVbmiipruzx is better for gaming than the MSI Optix G321CU. Motion handling is much better on the Acer as there's less smearing and blur trail with fast-moving objects. The Acer also has much better ergonomics and wider viewing angles than the MSI, so it's the better choice for co-op gaming. However, the MSI has the full 48 Gbps bandwidth of HDMI 2.1, while the Acer is limited to 24 Gbps, so your graphics card doesn't need to use compression for demanding signals.
The Gigabyte M28U is a better gaming monitor than the MSI Optix G321CU. The main advantage of the Gigabyte monitor is its superior motion handling, so there's less smearing with fast-moving objects. The Gigabyte also has wider viewing angles and better ergonomics that make it better for co-op gaming. On the other hand, the MSI has a bigger screen for a more immersive feel. It also has the full 48 Gbps bandwidth of HDMI 2.1, while the Gigabyte is limited to 24 Gbps, so your graphics card doesn't need to use compression for demanding signals.
The Gigabyte M32U is a better gaming monitor than the MSI Optix G321CU. The main advantage of the Gigabyte model is its superior motion handling, so there's less smearing with fast-moving objects. The Gigabyte also has wider viewing angles and better ergonomics that make it better for co-op gaming. On the other hand, the MSI has the full 48 Gbps bandwidth of HDMI 2.1, while the Gigabyte is limited to 24 Gbps, so your graphics card doesn't need to use compression if you need to send signals that require high bandwidth.
We buy and test more than 30 monitors each year, all of which we purchase ourselves, without cherry-picked units or samples. We put a lot into each unbiased, straight-to-the-point review, and there's a whole process from purchasing to publishing, involving multiple teams and people. We do more than just use the monitor for a week; we use specialized, custom tools to measure various aspects and deliver objective, data-driven results. We also consider multiple factors before making any recommendations, including the monitor's cost, its performance compared to the competition, and whether it's easy to find.
Test Results
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