The Gigabyte M28U is a great monitor with a 28 inch, 4k IPS screen. It delivers an impressive gaming experience with low input lag, a fast response time, and a great selection of gaming features. It's also great for office use, as the high pixel density results in outstanding text clarity, and it has wide viewing angles. It's one of the first monitors on the market to support HDMI 2.1, making it a great choice for 4k @ 120Hz gaming on the next generation of consoles. It's not without its flaws, as there's some overshoot with every overdrive mode. It also doesn't look very good in a dark room, as it has low contrast and bad black uniformity.
The Gigabyte M28U is a great monitor for most uses. The high-resolution screen delivers outstanding text clarity, making it a great choice for office use. It has wide viewing angles, a superb SDR color gamut, and excellent gray uniformity, making it a great choice for media creation and a decent monitor for watching videos. It's an impressive gaming monitor with low input lag, a fast response time, and a great selection of gaming features, including two HDMI 2.1 ports for next-gen console gaming.
The Gigabyte M28U is a great office monitor. The large, high-resolution screen delivers outstanding text clarity, and it has wide viewing angles, great for sharing your screen with your colleagues. It has decent peak brightness in SDR and good reflection handling, so glare generally shouldn't be an issue. It's also a great choice if your work requires accurate colors, as it has fantastic accuracy out of the box, incredible gradient handling, and excellent gray uniformity. Unfortunately, the stand has limited ergonomics in that it can't swivel or rotate to portrait orientation.
The Gigabyte M28U delivers an impressive gaming experience. It has an outstanding response time and a great selection of gaming features, including support for variable refresh rate technology (VRR). It has two HDMI 2.1 ports, making it a great choice for next-gen console gamers. Input lag is also really low, but you need to make sure it's updated to the latest firmware. The overdrive settings are a bit strange, too, as there's noticeable overshoot in every mode.
The Gigabyte M28U is a very good monitor for watching videos. The large, high-resolution screen is great for watching high-definition videos, and the wide viewing angles make it comfortable for sharing your screen with your friends. It has decent peak brightness in SDR and good reflection handling, so glare shouldn't be an issue for most people. It's not as well-suited for watching movies at night, though, as it has low contrast and bad black uniformity.
The Gigabyte M28U is a great monitor for media creation. The large, high-resolution screen makes it easier to see more of your project or timeline at once. It has fantastic accuracy out of the box, incredible gradient handling, and excellent gray uniformity. It also has an outstanding color gamut in SDR, but coverage of the Adobe RGB color space might be a bit too limited for some professional users. Unfortunately, it's not as well-suited for a dark room, as it has low contrast and bad black uniformity.
The Gigabyte M28U is a decent monitor for gaming in HDR, but mainly due to its impressive gaming performance. It has an outstanding response time, low input lag, and a great array of gaming features, including two HDMI 2.1 ports for next-gen consoles gamers. On the other hand, it can't deliver an impactful HDR experience. It has low contrast, bad black uniformity, and just decent peak brightness in HDR.
The Gigabyte M28U looks almost identical to the other M Series gaming monitors, including the Gigabyte M27Q. It has a simple design with extremely thin bezels on three sides and a flat stand base that supports the display well but takes up a bit more space overall. There's nothing flashy about this monitor; it looks good in almost any setting.
The Gigabyte M28U's stand has a relatively large footprint. Unfortunately, the stand and display wobble if the height is extended more than halfway to the maximum.
Unfortunately, the Gigabyte M28U's stand can't rotate to portrait orientation, and it can't swivel, so it's not very versatile. It has a great height and tilt adjustment range, though, so you shouldn't have any issues placing it in an ideal viewing position. The Gigabyte AORUS FI32U has slightly better ergonomics, if that's important to you. However, if you want a 4k gaming monitor that offers swivel adjustments, and you can rotate it into portrait mode, then check out the Samsung Odyssey G7 S28AG70.
The back of the Gigabyte M28U is a mix of matte and glossy plastic, which is prone to collecting dust and fingerprints. There's a cutout in the stand for cable management, and unlike the Gigabyte M27Q, there's a quick release for the stand. Unlike some high resolution, high refresh rate monitors, there's no fan on the back for cooling.
The Gigabyte M28U has good overall build quality. It's very similar to the other M Series monitors, like the Gigabyte M32Q. It's entirely plastic but feels sturdy. The glossy back section is prone to gathering fingerprints and dust, but you usually won't see it. The bezels seem solid, with no flex, and the stand is easy to adjust. Unfortunately, the stand wobbles a lot if the height is extended more than halfway to the maximum.
Unfortunately, the Gigabyte M28U has mediocre contrast, resulting in blacks that look gray in a dark room. These results are expected for an IPS panel and are slightly higher than the advertised typical contrast of 1000:1 for this model. Note that contrast can vary between units, even of the same model.
Note: the contrast measurements with local dimming were taken at the maximum brightness, as local dimming locks the brightness setting at max.
The Gigabyte M28U has a local dimming feature, which isn't mentioned anywhere in Gigabyte's marketing for this monitor. Unfortunately, like almost all monitors on the market, it's bad. There are only about eight zones, so zones are large, and transitions are extremely noticeable. It crushes small highlights, so scenes like a starfield look like they're completely black.
There's no major blooming with regular content; however, when zones first turn on, colors briefly appear over-saturated before shifting to normal. In many cases, the content we were trying wasn't even bright or large enough to cause the zones to turn on, so the screen remained dark, including when we tried playing content with subtitles.
Local dimming can be enabled or disabled in most picture modes, including in HDR, but it's not available in the sRGB mode. Enabling the local dimming feature locks out a few settings, including brightness, which is locked at max.
The Gigabyte M28U has decent peak brightness in SDR. There's very little variation in peak brightness, which is great, but very small highlights are dimmed a bit by the local dimming feature. It's bright enough for most environments, but direct sunlight might be an issue.
These measurements were taken after calibration, in the 'Standard' Picture Mode, with the backlight at max and local dimming enabled. The peak brightness can change depending on which mode you're using.
The Gigabyte M28U has decent peak brightness in HDR. It's not bright enough for a true HDR experience, but for gaming, it stands out. The peak brightness varies a bit with different content, but it's not noticeable. It meets the requirements for VESA DisplayHDR 400, which is the most common DisplayHDR certification for monitors, but it offers the least impactful HDR experience.
These measurements are taken before calibration, with HDR enabled, with the backlight at max and local dimming on. The peak brightness can change depending on which mode you're using.
As expected for an IPS monitor, the Gigabyte M28U has good horizontal viewing angles. Colors remain accurate even at a wide angle, but gamma shifts at a moderate angle, causing the image to wash out. This shouldn't be noticeable in normal usage, which is great if you like to sit close to the screen or share it with someone else.
The Gigabyte M28U has a very good viewing angle, with similar performance to the horizontal viewing angle. Colors remain accurate at a wide angle, but gamma shifts and brightness fades at a moderate angle.
The Gigabyte M28U has excellent gray uniformity. The sides of the screen are slightly darker, and there's a bit of dirty screen effect in the center. Near-black scenes look much better, with almost no noticeable dirty screen effect. Gray uniformity can vary between units, but it's rarely an issue on recent monitors.
Update 11/18/2021: We reconfirmed that our black uniformity with local dimming results are valid. There was no change to our results.
Unfortunately, the Gigabyte M28U that we bought has bad black uniformity. The screen is cloudy throughout, with a few spots of backlight bleed that can be very distracting in a dark environment. Unfortunately, local dimming does nothing to improve black uniformity, as the test cross is too small to trigger the local dimming feature. Note that black uniformity can vary between units.
Out of the box, the Gigabyte M28U has superb accuracy. There are no noticeable issues with the white balance or color accuracy. Gamma follows the sRGB target curve well, but most scenes are displayed a bit darker than they should be. Note that the accuracy out of the box can vary between units. The color temperature is slightly cold, but it's not noticeable.
Out of the box, the most accurate picture mode is the sRGB mode. Unfortunately, this mode brings some limitations; all settings except for the brightness are locked down and can't be changed, including the color temperature.
After calibration, the already superb accuracy of the Gigabyte M28U is even better. White balance and color accuracy are both improved, and gamma follows the sRGB curve almost perfectly. The color temperature is very close to our target.
You can download our ICC profile calibration here. It's provided for reference only and shouldn't be used, as the calibration values vary per individual unit due to manufacturing tolerances, even for the same model.
The Gigabyte M28U has a remarkable color gamut in SDR. It can display the entire sRGB color gamut used by most desktop and web content. Coverage of the wider Adobe RGB color space typically used for content creation is also great, but it might not be good enough for some professional users.
The Gigabyte M28U has exceptional color volume in SDR. It fills out nearly the entire sRGB color volume, but can't display dark saturated colors very well due to the low contrast ratio.
The Gigabyte M28U has a good HDR color gamut. It has excellent coverage of the most common DCI P3 color space but might still be too limited for professional color grading in P3. Coverage of the wider Rec. 2020 color space is just okay, so it's not as future-proof.
Note: The DCI P3 coverage is much lower than the advertised 94% coverage. It's normal and is due to the way we measure DCI P3. We measure DCI P3 by sending a Rec. 2020 signal, but unlike most reviewers, we limit the colors we're sending to the DCI P3 primaries. This results in a lower but arguably more accurate measurement.
The Gigabyte M28U has decent color volume in HDR. It's limited by the incomplete color gamut in both DCI P3 and Rec. 2020. Due to the low contrast ratio, it can't display saturated colors at low luminance levels.
The Gigabyte M28U shows no signs of temporary image retention on the unit we bought, but this can vary between units.
The Gigabyte M28U has exceptional gradient handling. There's a tiny bit of banding in darker shades, but it's not noticeable with regular content unless you're looking for it.
Although advertised as an 8-bit panel, this model accepts a 10-bit signal and displays it well, so it's most likely using dithering to approximate a 10-bit panel. It's also known as 8 bit + FRC.
The Gigabyte M28U we bought has a tiny bit of vertical color bleed, but it's not noticeable with regular content. This can vary between units, but is rarely an issue.
Update 11/18/2021: We redid the reflections test, as they seemed incorrect. The reflections are a bit worse than our initial measurements, but they're more in-line with similar monitors, like the Samsung Odyssey G7 S28AG70.
The Gigabyte M28U has good reflection handling, much better than the LG 27GP950-B. Glare from bright lights or sunlight directly opposite the screen can still be distracting, but most people shouldn't have any issues with it.
Update 01/17/2022: We received user reports about pixel inversion and color discoloration issues with high-frame-rate signals using Display Stream Compression (DSC). You can see in this video that there are color glitches with certain content. We couldn't replicate the issue with real content, so we tried to see if certain test patterns behaved the same. We noticed a pixel inversion issue with pattern #3, which caused stripes to appear, almost in the same spot as the video. We noticed a similar thing with the Gigabyte AORUS FV43U, although it's less visible on the M28U and not as consistent as sometimes it would be normal. This problem is only noticeable with high-frame-rate signals like 4k @ 144Hz 10-bit RGB that use DSC, and not at lower signals that don't require compression, as you can see here, but we can't be sure it's DSC causing the issue. We experienced the problem with our NVIDIA RTX 3070 and AMD RX 6800 graphics cards.
The Gigabyte M28U has outstanding text clarity thanks to the high-resolution screen and high pixel density. While running Windows ClearType can help improve text clarity a bit (top photo), it's not necessary, as text looks good even without it (bottom photo).
|Overdrive Setting||Response Time Chart||Response Time Tables||Motion Blur Photo|
The Gigabyte M28U has an outstanding response time, but there are a few oddities that will hopefully be fixed in a future firmware update. Like most Gigabyte monitors, there are five overdrive settings to choose from, but with this monitor, we recommend the 'Off' setting. Unlike most Gigabyte monitors, there's overshoot in every mode, including 'Off', but in this case, 'Off' delivers the best overall response time with the least amount of overshoot. 'Picture Quality' or 'Balance', our usual preferred settings with Gigabyte monitors, are both okay choices, but there's a bit more noticeable overshoot than usual. The larger Gigabyte M32U doesn't have this issue.
The M28U features a 'Smart OD' mode that's advertised to work similarly to a variable overdrive feature by automatically selecting the best mode, depending on the refresh rate. This saves you from having to adjust the Overdrive if you switch to a lower refresh rate. At both 144Hz and 60Hz, it appears to be in the 'Balance' mode, so we're not sure if it's doing anything.
|Overdrive Setting||Response Time Chart||Response Time Tables||Motion Blur Photo|
The Gigabyte M28U has a great response time at 60Hz, but there's significantly more blur behind fast-moving objects than at the max refresh rate. The same issues that we noticed at the max refresh rate are also present at 60Hz, so again we recommend the 'Off' Overdrive Setting, but even that setting has noticeable overshoot. Overshoot behavior is about the same across all settings, which is very unusual, except for the 'Speed' setting, which performs terribly and isn't usable.
The backlight of the Gigabyte M28U completely flicker-free, which is great as it can reduce eye strain.
The Gigabyte M28U has an optional black frame insertion (BFI) feature. There's very little strobe crosstalk, but the flicker can cause duplications in motion. Note that our scoring is based only on the refresh rates that support BFI, not how well it performs.
Unlike most monitors on the market, the Gigabyte M28U can use BFI even with a variable refresh rate, similar to ASUS' ELMB Sync technology. BFI works across all refresh rates of 120Hz and above with VRR enabled, and it works as expected. If the refresh rate drops below 100Hz, it's no longer possible to activate this feature. You can get around this by enabling BFI before dropping the refresh rate, but below 100Hz, the BFI feature is unstable and doesn't work consistently. Below 60Hz, it becomes extremely unstable and starts to flicker and even drop frames.
Update 01/17/2022: We received reports from users about issues with function shortcuts while using Display Stream Compression (DSC). One major complaint was that the Alt + Tab function took a long time to switch between apps, like between games and the desktop. We tried with our NVIDIA RTX 3070 graphics card with a 4k @ 144Hz 10-bit RGB signal, which uses DSC, and noticed it was slow to tab in and out games. We lowered the resolution to 1080p and 4k signals that don't require DSC, and while it was faster with each, it was still slow to tab into games. However, we tried with our AMD RX 6800 graphics card PC and noticed that there weren't any issues, even with 4k @ 144Hz 10-bit RGB signals. This makes us believe that the issue has to do with NVIDIA drivers and DSC and not with the actual monitor.
The Gigabyte M28U has a superb 144Hz maximum refresh rate. It supports FreeSync variable refresh rate technology, and it seems to work fine with NVIDIA's G-SYNC compatible mode, too, but it's not officially certified. It's also advertised to support HDMI Forum VRR with the PS5 once that feature is released, but we haven't been able to test that yet.
The maximum refresh rate supported varies depending on the source. You can read more about what to expect and what's supported in our additional review notes.
Update 09/03/2021: After a firmware update (version F06), we retested the input lag. The update greatly reduces the input lag, especially with the native resolution, so it's more in line with what we expect from a high refresh rate gaming monitor. Below are the old results so that you can see how the update changed the input lag:
The Gigabyte M28U has exceptional low input lag. It's a bit higher than the LG 27GP950-B, but it's still low enough for competitive gamers. You need to make sure the monitor is updated to the latest firmware to get these results, as we originally measured higher input lag (results above) with firmware version F03.
Unfortunately, we can't test the HDR input lag at the maximum refresh rate, as we can only test HDR over HDMI, and the maximum refresh rate of this monitor over HDMI requires an HDMI 2.1 port. Our test equipment is limited to HDMI 2.0, so we can't test HDMI 2.1 input lag at the moment. We don't expect HDR to make any difference to the input lag.
Update 11/18/2021: We remeasured the screen dimensions, as they were different than other similar displays.
The Gigabyte M28U has a great amount of screen area to work with and an extremely high-resolution screen. It's a great choice for multitasking or if you just want to enjoy excellent text clarity from the high pixel density. If you prefer a larger screen, the Gigabyte AORUS FI32U is a very similar monitor with a larger screen.
Update 08/17/2021: We were able to confirm that although the Gigabyte M28U supports HDMI 2.1, it's limited to 24Gbps, and relies on Display Stream Compression (DSC) 1.2a for anything that requires higher bandwidth. This introduces some limits on the supported resolutions, depending on the source device. You can read more about the supported resolutions here.
Unlike the other Gigabyte M Series monitors, the Gigabyte M28U has two HDMI 2.1 ports, making it a great choice for next-gen console gamers. There's also one USB-C port; it supports a few advanced USB-C features, including DisplayPort Alt Mode, 15W fast charging for supported devices. The USB-C port allows the monitor to be used as a KVM switch (keyboard, video, and mouse).
Update 11/22/2021: The Gigabyte M32U doesn't have Gigabyte's Eagle Eye feature. We updated the list of additional features below.
The Gigabyte M28U has a few additional features available, most of them gaming-oriented. It also supports picture in picture or picture by picture, allowing you to display two sources at once, but this feature isn't available in HDR or if FreeSync is enabled. Some of the other features include:
You can control the OSD using the joystick button at the back of the monitor, similar to most LG monitors. There's also a dedicated button for the KVM switch.
We tested the 28 inch Gigabyte M28U, which is part of Gigabyte's M Series gaming monitors, designed with productivity in mind, and all feature a built-in KVM (keyboard, video, & mouse) switch. It's a bit different from the other M series monitors, as it's one of the only ones with a 4k screen and HDMI 2.1 support. It's also available in a 32 inch size, known as the Gigabyte M32U, which we've also tested.
|Model||Size||Native Resolution||Max Refresh rate||Panel Type|
If you come across a different type of panel or your Gigabyte M28U doesn't correspond to our review, let us know, and we'll update the review. Note that some tests, like gray uniformity, may vary between individual units.
Our unit was manufactured in March 2021; you can see the label here.
The Gigabyte M28U is an impressive gaming monitor, and it's one of the few monitors available with HDMI 2.1 support, making it a great choice for next-gen console gaming. It has a few extra features that help it to stand out against the competition and it's one of the best 4k gaming monitors we've tested, but there are some motion issues that we don't see on other monitors.
The Samsung Odyssey G7 LC32G75T and the Gigabyte M28U use different panel technologies, each with strengths and weaknesses. The Samsung uses a VA panel, and it's a much better gaming monitor overall. The Samsung has a much faster response time at 60Hz, lower input lag, and better contrast. The Gigabyte, on the other hand, supports HDMI 2.1, so it's better for next-gen console gaming, and it has much better viewing angles and a higher resolution screen.
The Gigabyte M32U is a bit better than the Gigabyte M28U. Although these two monitors are very similar overall, the larger model has better ergonomics and a better response time. The M28U has worse overshoot in every overdrive mode, especially when gaming at 60Hz. On the other hand, the M28U has better reflection handling, but it's not a significant difference.
The Gigabyte M28U is slightly better overall than the LG 27GN950-B for most users. The Gigabyte has much better reflection handling, but it's not quite as bright as the LG, so if you're in a bright room, the LG might be the better choice. The Gigabyte is better for gaming, with two HDMI 2.1 ports for next-gen console gamers and a black frame insertion feature that works even with VRR enabled. The LG has a better response time, though.
The Gigabyte M27Q and the Gigabyte M28U are very similar, with a few key differences, so the best one depends on your usage. The M28U has a higher resolution screen, making it a better choice for office use or media creation. The M28U also features two HDMI 2.1 ports, so it's also a better choice for console gamers looking to get the most out of their PS5 or Xbox Series S|X. On the other hand, the M27Q is slightly better for most PC gamers, as it has slightly lower input lag and less overshoot.
The Gigabyte M28U and the Samsung Odyssey G7 S28AG70 are two excellent 4k gaming monitors. Picture quality is fairly similar, and even though the Gigabyte has much better out-of-the-box accuracy, it may vary between units. Motion is fantastic on each, but the backlight strobing feature on the Gigabyte flickers at a wider range than the one on the Samsung. They both have HDMI 2.1 inputs, but the Samsung has 40 Gbps bandwidth while the Gigabyte is limited to 24 Gbps, so it needs Display Stream Compression for certain signals, which you won't have to worry about on the Samsung.
The Gigabyte M28U is slightly better than the LG 27GP950-B overall, but some people might prefer the LG. The Gigabyte has much better reflection handling, so glare isn't as distracting in a bright room, and it has an optional backlight strobing feature. On the other hand, the LG has a faster refresh rate and better motion handling with 60Hz sources. The LG's HDMI 2.1 ports support the full bandwidth of HDMI 2.1, so it's also a slightly better choice for PS5 gamers.
The Acer Nitro XV282K KVbmiipruzx is a bit better than the Gigabyte M28U. The Acer has much better ergonomics, so it's easier to place it in an ideal viewing position. The Acer also has slightly lower input lag. There's also a difference in extra features, as the Gigabyte has a built-in KVM switch, supports Picture in Picture and Picture by Picture, and has a better black frame insertion feature.
The ASUS ROG Strix XG27UQ and the Gigabyte M28U are very similar overall, but the ASUS is slightly better for most people. The ASUS has better ergonomics and it's brighter. The Gigabyte has slightly better reflection handling, and its black frame insertion feature is a bit more versatile, as it works across a wider range of refresh rates.
The Gigabyte M28U is a bit better than the Gigabyte G27Q. The M28U has a higher native resolution, giving it better text clarity for office use or media creation. The M28U has a faster response time, a more versatile black frame insertion feature that works even when VRR is enabled. The M28U also features two HDMI 2.1 ports, so it's also a better choice for console gamers looking to get the most out of their PS5 or Xbox Series S|X.