It’s pretty much that simple.

Which is where the new AOC Agon Pro AG276FK comes in.

If there’s a catch, it’s that the native resolution is just 1080p.

AOC Agon Pro AG276FK gaming monitor tilted slightly to the side, showing the Windows desktop screen

This monitor is never going to be a great all-rounder.

That monitor actually has superior HDMI 2.1 connectivity, but is otherwise very similar on paper.

Of course, this is a heck of a lot of money for a mere 1080p 27-inch monitor.

Back of the AOC Agon Pro AG276FK gaming monitor, showing RGB lighting and adjustable stand

(Image credit: Future / Jeremy Laird)

But then the 520Hz refresh rate is an extreme specification and comes at a cost.

Mostly, that’s thanks to the eye-watering 520Hz refresh rate.

But it does have other attractions.

Connection options on the bottom of the AOC Agon Pro AG276FK gaming monitor

(Image credit: Future / Jeremy Laird)

The 27-inch panel is an IPS item with claimed 0.5ms GTG and 0.3ms MPRT pixel response.

In the context of LCD as opposed toOLEDmonitors, those are very impressive numbers.

The slim bezels on three sides of the 27-inch IPS panel also ensure it looks current and up-to-date.

AOC Agon Pro AG276FK gaming monitor showing Cyberpunk 2077 on screen while resting on a desk

As for connectivity, you get two DisplayPort 1.4 connections capable of the full 520Hz.

Undoubtedly the highlight is that 520Hz refresh.

Up around 500fps, then, this monitor absolutely flies.

On-screen display of the AOC Agon Pro AG276FK gaming monitor

(Image credit: Future / Jeremy Laird)

Obviously the gains are marginal as you increase refresh rates.

Put it next to a 360Hz monitor, and the gains will inevitably be more marginal.

Ultimately, the extent to which you notice and benefit from 520Hz will always be subjective.

On-screen display of the AOC Agon Pro AG276FK gaming monitor

(Image credit: Future / Jeremy Laird)

It’s also very fast for an LCD panel when it comes to pixel response.

you’re able to choose between the four levels of pixel overdrive in the OSD menu.

Anyway, this monitor is about as LCD tech currently gets when it comes to pixel response.

On-screen display of the AOC Agon Pro AG276FK gaming monitor

(Image credit: Future / Jeremy Laird)

You’ll need to make the jump to an OLED panel to get something clearly faster.

Another strong point, relatively speaking, is the calibration.

It’s all really nicely set up in SDR mode, with punchy and accurate colors.

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In HDR mode, it’s nicely executed, too, and that includes accurate SDR colors in HDR.

Of course, this isn’t a true HDR monitor.

It has HDR400 calibration, but there’s no local dimming.

But that’s par for the course for this class of display.

If all that sounds good, the major downside involves pixel density.

1080p stretched across a 27-inch panel like this makes for a lowly density of just 82DPI.

That translates into blocky image quality and rough looking fonts on the desktop.

For general computing, web browsing or content creation, this is not a great display.

But that is not its remit.

Should I buy the AOC Agon Pro AG276FK?

Only an OLED monitor will be quicker.

You like good color calibration

The AOC Agon Pro AG276FK isn’t just fast.

You want true HDR capability

The AOC Agon Pro AG276FK offers HD400 certification.

But it doesn’t have local dimming and it’s not truly capable of high dynamic range rendering.

It’s a 4K 240Hz model, so not quite as high refresh.

But the pixel response is ultra low and the 4K OLED image quality is to die for.

But full immersion tends to provide fuller insights.

Would the huge Hz number translate into noticeably lower latency?

Comparing the pixel response to the best IPS panels and also the latest OLED screens is also intriguing.