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Displays & Monitors

Cooler Master GM27-CFX 240Hz Gaming Monitor Review

Display Analysis

On the stock settings, the monitor delivers very colour reproduction, and this can be pushed higher if you’re using the HDR mode and getting more out of the DCI-P3 support, but honestly, it looks pretty great in SDR too.

Gamma

There are five gamma settings on this monitor, which seems excessive, especially when none of them hit the desired 2.2 targets correctly. Actually, the Gammer 2.4 setting came closest, and while the testing software scored it at 2.3, it’s more like 2.25, it’s close enough and looked very good.

Grey Ramp

The grey ramp is very good throughout all the gamma modes though, with very little deviation, and is surprisingly accurate for a monitor in this price range.

Brightness

The overall peak brightness is great too, even in SDR mode it managed around 360 nits, and can do up to 400 in HDR mode, but obviously with no complex backlight filtering technologies, this can lead to a loss in contrast on darker areas too.

There are four white point settings on this monitor, and I was surprised the cooler ones were less bright, but I see no reason to take it off of the native or warm mode, as they provide a much more accurate picture anyway.

Colours

Colour uniformity is reasonable enough, a little warmer on the right, but not to a level I could actually notice by eye.

There’s perhaps a little backlight bleed in the edges, but that’s to be expected on an edge-lit panel, and it’s well-maintained on this panel, and its pretty uniform too. I would also say there’s likely some more deviance being detected than there should be, due to the curved panel which may be interfering with the light sensor.

As for colour accuracy, anything under 5 Delta-E is good, under 3, very good, under 2 is really excellent and largely, that’s where this monitor sits. It’s good enough to trust that the colour on-screen are what they were intended to be. Even the blue, which is often the one that sticks out, is kept remarkably in check here.

After running our calibration too, I actually got that down to an Average Delta of 0.98! However, it’s a pretty small gain that most users are unlikely to really notice.

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Peter Donnell

As a child in my 40's, I spend my day combining my love of music and movies with a life-long passion for gaming, from arcade classics and retro consoles to the latest high-end PC and console games. So it's no wonder I write about tech and test the latest hardware while I enjoy my hobbies!

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