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Asus ROG Swift PG27AQ 27-inch 4K G-Sync display review

Rating: 9.5.

The ROG Swift PG27AQ is a 4K gaming monitor from Asus that supports Nvidia G-Sync up to 60Hz. It’s a 27-inch IPS display with a 4ms response time and a 10-bit colour panel. Add on a flexible stand with pivot, tilt and rotate support, with a redesigned software interface, and it could be a contender for the best gaming display on the market.

Displays have gone from being a rather mundane area of technology, without much changing all that drastically over the years, to now being one of the most exciting areas of computer hardware. As such, a quality display is now the cornerstone of a great gaming experience.

TN panels have improved dramatically, with much better brightness and contrast, while continuing to offer low 1ms response times, which is great for fast, twitch-based gaming. IPS technology has fallen in price, with screens that have longer response times but much better viewing angles.

We have a wide number of new and exciting technologies that make displays far more interesting. This includes adaptive-sync, where the output of frames from the video card is synchronised to a monitor’s refresh rate, eliminating the tearing effect you sometimes see in games. There are also larger 4K resolution displays which look unbelievably good in games, as long as a PC’s graphics card can pump out pixels fast enough.

There are plenty of examples of displays that either come with adaptive-sync or 4K resolution, but few that offer both. And the vast majority of G-Sync and FreeSync monitors are built with TN panels.

That is what makes Asus PG27AQ so special. It offers a native resolution of 3840×2160 across its 27-inch IPS screen, and it is compatible with G-Sync, so it offers adaptive sync with Nvidia graphics cards. The combination of all three technologies in a single display sounds like a dream come true for a lot of gamers.

It’s not the only 4K display with G-Sync. Acer’s XB280HK (Review HERE) came out a few months ago and offers a very good combination of both G-Sync and 4K.

But there are two differences between that screen and the Asus PG27AQ. The XB280HK is based on TN panel technology, while the PG27AQ is IPS. And with the PG27AQ, Asus has addressed one of the main issues with G-Sync, that it only comes with a single DisplayPort 1.2 input, by building in a second circuit that allows for an extra HDMI port (although the PG27AQ is still based on the G-Sync 1.0 standard).

While not everyone will ever need more than one video input, having a second is important for anyone who wants to use a games console or second PC with their monitor.

It only supports G-Sync up to 60Hz. The previous Asus G-Sync display, the ROG Swift PG278Q, has a 1440p native resolution, and supports G-Sync up to 144Hz, as do many other displays, although once again, that is a TN screen. While the G-Sync effect will be noticeable even at 60Hz, it’s not as impressive as when its running at 144Hz.

But unfortunately, if you want 144Hz 4K you will have to wait until at least 2016, as the current DisplayPort 1.2 standard cannot offer the required bandwidth to refresh a 4K pixel count 144 times a second. The DisplayPort 1.3 standard does, but no graphics card currently offers it. We expect both Nvidia and AMD’s next-generation cards to adopt it, but it’s not available yet.

If you want 4K and G-Sync in a display it seems this is a compromise we simply have to put up with for now. But to make up for this slight limitation the PG27AQ has a lot of other extras to offer. It is a 10-bit flicker-free panel, with a great (for an IPS display) 4ms response time, it has superb build quality and the now-ubiquitous Asus red joystick to navigate through the screens of a well-designed OSD. It all sounds very impressive.


Screen size: 27 inch
Native resolution: 3,840 x 2,160
Refresh rate: 60Hz
Panel type: IPS
Display inputs: DisplayPort 1.2, HDMI 1.4
USB hub: 2x USB 3
Tilt: -5 to 20 degrees
Raise: Yes
Swivel: Yes
Other: Nvidia G-Sync, 10-bit colour, flicker-free panel, low-blue light settings.

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  1. For 4K @ 144Hz, they can just add second DP 1.2, similar to 5K displays. Could be more future proof, as most cards have multiple DP outputs.

  2. The initial 4K displays used multiple displays inputs and that didn’t work well at all. Loads of problems with tearing and such.

  3. Wasn’t that because the displays were set up to treat the 4K screen as two separate “halves”?

  4. Yeah, and that’s what you’d have to do with TristanSDX’s solution.

  5. Weren’t the early panels physically 2 panels though? I seem to recall hearing that the split wasn’t just logical, that a single 4K panel was too expensive to make back then so two cheaper 1920*2160 panels were stuck together in a single frame to make it work.

    Why couldn’t the bandwidth provided by the 2 DP cables be aggregated without having to virtually split the screen into two halves?

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  7. Leo should have done a video review of this.

  8. Any way to get this in the USA yet???

  9. You can get it now at Newegg. And some time soon Amazon will have it in stock.

  10. You say that gsync effect is striking at 144hz and less so at 60hz? 144hz does not and never has needed adaptive sync to make it impressive. I really wonder if some of the people singing gsync praises had ever used a high refresh monitor before they tested gsync. All the explanations of the benefits gsync has at 120hz and above are actually the benefits of 120hz and above.