Put together a wish list—the sky's the limit—of things you'd want in a 27-inch gaming monitor,and you'd probably come up with something like the Acer Predator X27 ($1,999.99). 4K UHD resolution, support for Nvidia's G-Sync adaptive-sync tech, and HDR support—check. High luminance and an expanded color gamut—check. Add wicked-fast refresh rates, a plethora of input ports, an ergonomically friendly stand, and gaming-friendly features such as multiple crosshair types, and you have an absolute dream-screen gaming display (with a price to match). I first saw the X27 in action last summer at a demo hosted by Nvidia, which developed the monitor's G-Sync adaptive-sync technology. I viewed a demo of Final Fantasy XVand was awestruck by this monitor's ability to capture subtle variations in shading and bring out detail in dark areas, as well as to capture brilliance in bright areas without them looking washed out. This panel's brilliance and dynamic range set it apart as something special,...

Acer's formidable (and formidably pricey) Predator X27 is an elite-performing 27-inch gaming monitor that provides 4K UHD resolution, very high brightness, lofty refresh rates, and G-Sync support. It's the ultimate gaming panel.

4K UHD resolution; Supports HDR content; Very high rated and tested brightness; Excellent contrast ratio for an IPS monitor; Glare-reducing hood; Stylish, ergonomic mount provides height, tilt, and swivel control

Stratospheric pricing; Requires high-performance hardware to get the most out of it

Very good if you can afford it and think it is worth it (and has a terribly good computer). Tested XB273K before, which is an almost identical screen, except that the XB273K has the HDR400, while it has HDR1000 and 384 backlight zones.

Familiar to a lot of PC gamers, Acer's Predator range of monitors usually include a tasty set of specifications such as G-Sync, low response times and...

Gorgeous 4K HDR display quality; Superb colour accuracy; Nvidia G-Sync; 144Hz refresh rate; Quantum Dot; Full Array Local Dimming; PC games have never...

It's £1799; Fan noise could be a distraction; Some settings unavailable in HDR mode; Fiddly menu system; Input lag a little high; Windows still not...

The best monitor I have ever seen and used. It has revolutionary color accuracy and refresh rate. Gaming on this takes immersion to a whole new level.

Back in September last year, we had a chance to test out the ASUS ROG Swift PG27UQ 4K HDR gaming monitor. Referred to unofficially as the "God monitor", it was the first time we ever played with a gaming monitor of such calibre, and suffice to say, it didn't disappoint.

I'm very happy with this monitor I had done so much research over the asus and acer. For ￡400 difference at time of writing I opted for this one as they share the same panel. I was worried the fan noise as reported in earlier reviews would be an issue but it is not at all.

Easily one of the best in class when in comes to features and performance, but that price tag puts it out of reach for many.

Stand; Visual performance

Price

The Acer Predator X27 is one of the best gaming monitors to date and impresses through a lavish specification that includes 4K resolution, G-Sync at up to 144Hz and DisplayHDR 1000 certification.

4K UHD resolution and 144Hz refresh; Silky smooth Nvidia G-Sync; Impressive HDR credentials; Excellent colour coverage and accuracy

Costs £1,800; Fan noise is annoying; Halo effect can be distracting

A 144Hz refresh rate, 4K resolution and proper HDR thanks to a clever 384-zone backlight, mark the Acer Predator X27 out as one of the most feature-rich and capable gaming monitors you can buy.

Fantastic image quality; Great gaming performance; Stunning HDR

Very expensive; Still only a 27-inch display; 4K resolution too demanding