The Samsung Odyssey G5/G55A S27AG55 is an entry-level 1440p gaming monitor. Part of the 2021 Odyssey gaming lineup, it's newer than the Samsung Odyssey G5 C27G55T and is an older version of the Samsung Odyssey G5/G55C S27CG55. It also sits alongside the Samsung Odyssey G5 S27AG50, which has a different panel type. It's available in both a 27 and 32-inch model, and both sizes have a curved 1440p VA panel and a 165Hz refresh rate. It has FreeSync VRR and supports HDR, but there are very few additional gaming features. It also lacks advanced productivity features, like a USB hub.
Our Verdict
The Samsung Odyssey G55A isn't bad for PC gaming. It has a slow response time with any refresh rate, leading to noticeable blur, and the motion handling is even worse with VRR enabled. On top of that, it has noticeable VRR flicker with changing frame rates. It also has limited picture quality due to its lack of local dimming and low peak brightness, so it can't deliver realistic and vivid images. On the plus side, it has low input lag for a responsive feel.
- High native contrast contrast.
- Low input lag.
- VRR support.
- No local dimming.
- Low peak brightness in SDR & HDR.
- Disappointing motion handling.
- Terrible VRR flicker with changing frame rates.
The Samsung Odyssey G55A is disappointing for console gaming. While it doesn't support HDMI 2.1 bandwidth and can't take full advantage of the PS5 and Xbox Series X|S, it still supports most signals from the consoles. It also has low input lag for a responsive feel, great for playing reaction-based games. That said, it has disappointing motion handling with noticeable blur, and it also has limited picture quality as it can't make highlights pop in HDR.
- High native contrast contrast.
- Low input lag.
- Low peak brightness in SDR & HDR.
- Disappointing motion handling.
- Lack of HDMI 2.1 bandwidth.
The Samsung G55A is just okay for office use. The relatively large, high-resolution screen delivers good text clarity. Unfortunately, it has just okay peak brightness, so it can't overcome glare in a bright room. It also has terrible ergonomics and poor viewing angles, so it's hard to adjust the screen to an ideal viewing position and share it with others next to you.
- Good reflection handling.
- Good text clarity.
- Terrible ergonomics.
- Narrow viewing angles.
The Samsung Odyssey G55A is a decent monitor for media creators. It has great accuracy before calibration, but calibrating it still results in the best accuracy. The relatively large screen is great for multitasking, and you can see more of your workflow at once. Unfortunately, it has terrible ergonomics and poor viewing angles, so it's hard to share your screen with someone else, like a colleague or client, as they won't see the same thing you see. It also lacks a local dimming feature to improve the contrast ratio in dark scenes.
- High native contrast contrast.
- Good reflection handling.
- Good text clarity.
- Terrible ergonomics.
- Low peak brightness in SDR & HDR.
- Narrow viewing angles.
- Needs full calibration for best accuracy.
The Samsung G55A has mediocre brightness. It doesn't get bright enough to fight intense glare in well-lit rooms, and it can't make highlights pop in HDR, either.
- Low peak brightness in SDR & HDR.
The Samsung Odyssey G55A has a poor response time. There's noticeable smearing and motion blur with fast-moving objects, especially with VRR enabled.
- Disappointing motion handling.
- Terrible VRR flicker with changing frame rates.
The Samsung G55A is terrible for HDR. Although it has a good native contrast ratio, it lacks a local dimming feature to improve it further. It also can't display a wide range of colors in HDR and fails to make them look vivid.
- High native contrast contrast.
- No local dimming.
- Low peak brightness in SDR & HDR.
- Can't display wide HDR color gamut.
The Samsung Odyssey G55A has decent picture quality in SDR. It has a good contrast ratio that helps it display fairly deep blacks, but there's still backlight bleed in dark scenes.
- High native contrast contrast.
- Backlight bleed in dark scenes.
The Samsung G55A has excellent color accuracy. It has great accuracy before calibration, but without a dedicated sRGB mode, you still need to calibrate it for the best accuracy.
- Great gray uniformity.
- Needs 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: Added that the LG 27GR75Q-B has better SDR Brightness.
- Updated Apr 17, 2024: Updated text throughout the review according to Test Bench 2.0, mainly in the Verdict and Motion sections.
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Differences Between Sizes And Variants
We tested the 27-inch Samsung Odyssey G55A, and while it's also available in a 32-inch size, that's a different monitor, and the results are only valid for the 27-inch model. There are other similar models in the Odyssey gaming lineup, and you can see the differences between them below.
| Size | Name | US Model Code | Refresh Rate | Panel Type | Curved |
|---|---|---|---|---|---|
| 27" | Odyssey G55A | LS27AG550ENXZA | 165Hz | VA | Yes |
| 32" | Odyssey G55A | LS32AG552ENXZA | 165Hz | VA | Yes |
| 27" 32" |
Odyssey G50A |
LS27AG500PNXZA LS32AG500PNXZA |
165Hz | IPS | No |
Our unit was manufactured in November 2021; you can see the label here. It was tested with firmware M-A5500GCZA-1001.4.
Popular Monitor Comparisons
The Samsung G55A isn't a bad budget gaming monitor. However, its slow response time leads to considerable motion blur. If you want a budget gaming monitor with better motion handling, go for something like the Dell G2724D.
For more options, check out our recommendations for the best 1440p 144Hz monitors, the best curved gaming monitors, and the best gaming monitors.
The Samsung Odyssey G55A S27AG55 and the Samsung Odyssey G55C S27CG55 are extremely similar 27-inch gaming monitors. The G55C is a newer monitor that gets brighter, making it the better choice in a bright environment. However, the G55A has considerably lower input lag and is the better choice if you want a responsive feel while gaming.
The Samsung Odyssey G51C S27CG51 is a newer model than the Samsung Odyssey G55A S27AG55, with a few improvements. The S27CG51 has a flat screen instead of the curved screen on the S27AG55, and its stand offers much better ergonomics, making it easier to place in an ideal viewing position. The S27CG51 also has a faster response time, but the monitor's motion handling is still limited. On the other hand, the S27AG55 supports DisplayPort 1.4 bandwidth, while the S27CG51 is limited to DisplayPort 1.2 bandwidth, meaning you can reach the S27AG55's max refresh rate even when playing 10-bit games in HDR.
The Gigabyte G27QC is much better than the Samsung Odyssey G55A S27AG55. The Gigabyte has better ergonomics, so it's easier to place it in an ideal viewing position. The Gigabyte also has a significantly faster response time, so motion looks clearer with less blur behind fast-moving objects. Finally, the Gigabyte also gets a bit brighter, so it looks better in a bright room.
The Samsung Odyssey G7 C32G75T is much better than the Samsung Odyssey G55A S27AG55. The G7 has much better ergonomics, so finding an ideal viewing position is easier. The G7 also gets significantly brighter and has a significantly better response time, resulting in clearer motion with almost no noticeable blur behind fast-moving objects.
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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