LC-Power M27UO Review (4K/240Hz QD-OLED)

1. Introduction2. Design3. On-screen Display (OSD)4. Panel Analysis: SDR5. Panel Analysis: HDR6. Response Times & Motion Clarity7. Input Latency8. Closing Thoughts9. View All Pages

It's been a while since we last reviewed an LC-Power monitor, but the company released its first OLED screens this year, with the M27UO utilising the same 4K/240Hz 4th Gen QD-OLED panel as MSI's 272URX and AOC's AG276UZD.

Given it is using the same QD-OLED panel as those monitors, we were expecting the M27UO to deliver a great gaming experience and it does not disappoint. There's zero ghosting whatever the refresh rate, the wide gamut and infinite contrast lends itself to a very punchy image, plus motion clarity at 240Hz is very impressive – even if faster OLEDs are now available (just not at 4K resolution, mind!)

LC-Power has done a good job in other areas, too. I like the grey design, the OSD is very feature-rich (although, admittedly, on the uglier side), while you also get four full-size video inputs, plus one Type-C that offers KVM functionality to boot.

Its biggest drawback is undoubtedly the factory calibration. Out of the box, the image is far too warm and gamma runs closer to 2.5 than it does to the 2.2 target, resulting in a high degree of inaccuracy. This is partly excusable because LC-Power provides alternate modes, like the Natural colour balance setting and the Gamma 2.0 option, which are significantly better. However, it doesn't change the fact that, by default, the monitor is fairly poorly set up. That extends to the sRGB mode, too, which still has too high a gamma value which cannot be adjusted in that mode.

That could be a stumbling block for some. After all, the MSI 272URX is just as good for gaming, but doesn't have these issues with factory calibration, and is currently priced just £30 above the M27UO. LC-Power have done the right thing with the aggressive pricing – it's the cheapest 4K/240Hz OLED that I can see right now – but I'm just not sure they've gone far enough to tempt prospective buyers away from the more established brands.

We found it listed on Amazon for £669 HERE.

Pros

• Very wide gamut.
• Effectively infinite contrast ratio.
• Very fast response times.
• 4K resolution coupled with 240Hz OLED makes for a very sharp experience.
• HDR hits 1000 nits along with a True Black 400 mode.
• 2x HDMI 2.1.
• USB-C and KVM support.
• Feature-rich OSD.
• Grey design makes a nice change from the typical gaming monitor.
• Cheapest 4K/240Hz QD-OLED on the market (as far as we can see).

Cons

• Default colour balance is far too warm.
• The Gamma 2.2 setting is closer to 2.5 in our testing.
• sRGB emulation mode is also disappointing.
• OSD could do with a lick of fresh paint.
• The two DisplayPort connectors are 1.4 spec, not 2.1.
• Other monitors from more established brands, using the same panel, are available for just £30 more.

KitGuru says: If you find it on sale at a good price, 4K/240Hz QD-OLED makes for a great gaming experience, but the factory calibration lets the M27UO down.

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