Pros & Cons
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- Dual refresh rate/resolution modes
- Low input lag in both modes
- Great color range
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- No USB-A ports
- No HDR support
- Lackluster sound quality from built-in speakers
ViewSonic XG275D-4K Specs
| Adaptive Sync | AMD FreeSync Premium, Nvidia G-Sync Compatible |
| Aspect Ratio | 16:9 |
| Height-Adjustable Stand? | |
| Landscape/Portrait Pivot | |
| Native Resolution | 3840 by 2160 |
| Panel Size (Corner-to-Corner) | 27 |
| Pixel Refresh Rate | 320 |
| Rated Contrast Ratio | 1,000:1 |
| Rated Screen Luminance | 300 |
| Screen Technology | IPS |
| Swiveling Stand? | |
| Tilting Stand? | |
| VESA DisplayHDR Level | NA |
| Video Inputs | DisplayPort |
| Video Inputs | HDMI (2) |
| Warranty (Parts/Labor) | 3 |
| Weight | 13.9 |
OLED screen technology now dominates the market for premium gaming monitors. But if you’re looking for a great gaming panel without paying OLED prices, the ViewSonic XG275D-4K ($499, but frequently on sale) might be right for you. This 27-inch 4K model has two distinct performance modes: one that offers 4K (3,840-by-2,160-pixel) resolution at a 160Hz refresh rate, and another that offers full HD (1,920-by-1,080-pixel) resolution at 320Hz. The XG275D-4K pairs well with a wide range of setups, including console gaming and high-refresh-rate PC gaming. Design- and feature-wise, it’s a simple monitor, but simple is sometimes best when it comes to delivering low input lag and a wide color gamut. It's our Editors' Choice pick for the best monitor for everyday 4K gaming.
Design: A 'V' for Victory
The XG275D-4K won't win any beauty contests with its plain, all-black stand and thin bezels that frame the screen, but it's got one design feature of note: a V-shaped base like the one on the LG 27 UltraGear Gaming Monitor (27GR83Q). Some gamers might prefer the V to a squared-off design, since it offers additional space for tucking in a keyboard and mouse while scooting up close to the screen. I'm not one to play like that, but I do appreciate that V-shaped stands offer a bit more room on your desk—depending on your keyboard and mouse setup—than rectangular ones.
As far as size, the XG275D-4K measures 17.4 by 24.2 by 9.6 inches (HWD), and expands to a maximum height of 22.5 inches when the stand is fully extended. It tips the scales at 13.9 pounds.
(Credit: Joseph Maldonado)As we said above, this isn't an OLED device: You're getting an IPS panel, a category known for wide viewing angles and color accuracy, and improved performance over VA panel technology. OLED monitors usually outperform IPS panels, thanks to the improved contrast and color vibrancy, but they also typically cost significantly more money. (That said, we've already seen some examples of OLED gaming monitor prices coming down to earth, like the Alienware 27 280Hz (AW2725D.)
(Credit: Joseph Maldonado)Features and Connectivity: One Monitor, Two Different Ways to Play
The XG275D-4K is not the most esports-friendly monitor we've reviewed, but it does feature some nifty features for players who take their games very seriously. An esports setting tucked away in the OSD menu creates a 24.5-inch window, with wide borders that fill the other 2.5 inches of the screen. For pro gamers, the smaller viewable area improves their reaction times and allows them to see more of the screen at a glance. The monitor also offers AMD FreeSync Premium and Nvidia G-Sync compatibility to handle potential screen tearing.
Then there's the dual-mode option. Monitors that offer two different refresh rate/resolution combinations aren't new, as premium monitors like the LG 32-Inch UltraGear OLED Gaming Monitor (32GS95UE-B) offer similar functionality. The difference with the XG275D-4K is that it's much cheaper than these other offerings, potentially putting it in the realm of affordability for casual gamers.
(Credit: Joseph Maldonado)Turning to the monitor’s I/O selection, you’ll find two HDMI 2.1 ports, a DisplayPort 1.4 input, a 3.5mm headphone jack, and one USB-C port with 65 watts (65W) of power delivery. I don’t expect cutting-edge DisplayPort 2.1 support at a monitor of this price, but I’m surprised that the XG275D-4K offers not a single USB-A port. An OSD joystick sits at the bottom right side of the monitor, with a button just above it that changes the monitor’s resolution and refresh rate. Two 2W speakers provide decent audio, but they’re begging to be replaced with a richer set of computer speakers or a gaming headset.
Performance Testing: For Starters, a Great Color Range
We ran the XG275D-4K through a series of benchmark tests using Calman monitor calibration software, a Murideo Six-G signal generator, and a Klein K-10A colorimeter. We also put the monitor through a gauntlet of games to measure input lag and judge its real-world performance. All of our readings were done on the monitor’s 4K/160Hz mode.
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In our first test, we benchmarked the brightness with the monitor's default gaming profile over an SDR signal. Under these conditions, we saw an average brightness of 292 nits, just under the monitor’s rated 300 nits of brightness. That’s good for most rooms, even well-lit ones, though the monitor lacks any HDR support, which could’ve improved brightness for supported games and media.
(Credit: Portrait Displays)Turning our attention to the monitor’s color gamut, we find that the XG275D-4K spanned 95.1% of the Adobe RGB color gamut, 100% of the sRGB gamut (see the chart above), and 96.5% of the DCI-P3 gamut (see the chart below). That’s excellent color coverage for an IPS panel.
(Credit: Portrait Displays)The monitor has a rated contrast ratio of 1,000:1. Contrast ratio indicates the difference in luminance between the brightest white and the darkest black that a monitor can produce. While a 1,000:1 ratio rating is what we expect from an IPS panel, it's a far cry from the nearly infinite contrast ratios of OLED screens. Still, the ViewSonic does seem slightly above average for an IPS panel; to my eye, it sports a more vibrant picture than the Alienware 25 (AW2525HM), which also uses an IPS panel rated at 1,000:1.
Input Lag Testing: On Point for the Price
Depending on the kind of games you play, the most important aspect of any gaming monitor might be its input lag. To measure that, we deployed the Leo Bodnar 4K Input Lag Tester and played a handful of games from our library to check for any noticeable blemishes.
(Credit: Joseph Maldonado)We started our testing in the monitor's 1080p/320Hz mode. There, we recorded an excellent 2.4ms of input lag at 1080p/240Hz using the Bodnar device (240Hz being the refresh-rate ceiling of the equipment). At 1080p/120Hz, we recorded 4.5ms of input lag, and at 1080p/60Hz, we recorded 12.8ms. That’s comparable with the Alienware 25 (AW2525HM) at higher refresh rates, but it's 4ms slower at 60Hz. (The AW2525HM recorded 8.9ms at 60Hz.)
We then switched to the monitor’s 4K/160Hz mode and tested at three resolutions, including 1080p again to see if the mode switch would make any difference. We recorded a better 8.6ms of input lag at 1080p/60Hz, and the same 4.5ms of input lag at 1080p/120Hz. We then upped the resolution; at 1440p/60Hz, we recorded 6.1ms, and at 1440p/120Hz an 8.7ms reading. Finally, we moved to 4K; at 4K/60Hz, we recorded 8.4ms. (Our Bodnar meter can't exceed 60Hz at 4K.)
Overall, these numbers are pretty good. We consider input lag of up to 16ms at 60Hz to be perfectly playable, though esports enthusiasts will be better off with monitors like the Sony InZone M10S and the LG 27 UltraGear OLED (27GX790A), thanks to their higher maximum refresh rates. While the Bodnar doesn't allow us to measure above 240Hz at any resolution, with all things equal, the higher the refresh rate, the lower the input lag. So, in theory, you can expect even lower input lag on the InZone M10S and the LG UltraGear 27GX790A.
In use, the XG275D-4K proved to be dependable in both high-refresh and high-resolution modes. While the picture quality could be improved by a better contrast ratio to handle deeper blacks, games like Doom: The Dark Ages still looked good on the screen.