AOC C4008VU8 UHD Monitor Review

OSD Setup & Calibration

The C4008VU8 sticks to AOC’s tried-and-true menu strip which appears at the bottom of the screen and covers almost its full width. Navigation is very easy with the joystick, which changes fields and selects with a press. It feels high-end with solid feedback and a complete lack of play. This is the way all monitors should be.

The Luminance menu features six picture modes plus a seventh that turns on a uniformity compensation option. Standard is the default and renders the monitor’s full DCI-P3 color gamut. If you’re looking for the sRGB gamut, it’s found in the Color Setup menu with the color temp presets. You'll also find three gamma presets, dynamic contrast, and three overdrive settings. The medium option is the best with minimal ghosting and noticeable motion blur reduction.

The Image Setup menu is only available for analog VGA signals. It lets you tweak the clock, phase, sharpness, and picture position.

Color Setup starts with four temperature presets plus a user mode. The latter has a single-point adjustment with sliders that start at center range. In our tests, we couldn’t improve upon the C4008VU8’s out-of-box grayscale tracking. It’s decent with or without calibration but not quite in professional monitor territory. This menu also has DCB modes that alter color in green, sky, and flesh tones. Finally, there is a low blue light setting with weak, medium, and strong options. It can be used to reduce eye fatigue during long work sessions.

This monitor boasts AOC’s trademark Picture Boost menu, with its ability to highlight a specific area of the image. You can alter the frame size and position, then adjust brightness and contrast within it independent of the surrounding picture.

OSD setup has 16 language choices, timeout up to 120 seconds, menu position, and transparency. You can set a one-hour break reminder if you wish. For compatibility with older video cards, there is a DP 1.1 option. And the HDMI 2.0 port can be set to version 1.4 if needed for certain Blu-ray players.

The C4008VU8 is a perfect display for PIP and PBP. You can view up to four sources at once thanks to the wide variety of inputs. The PIP window can be sized and moved to any corner of the screen. You can also control which source receives audio support.

The Extra menu has an input selector, off timer (up to 24 hours), aspect ratio control, DDC/CI toggle, and a factory reset.


Calibrating the C4008VU8 required us to make a few compromises. In Standard mode, grayscale tracking and gamma are quite good except for the brightest parts of the image, which look a little blue. Reducing the contrast control helps with that. Adjusting the RGB sliders produces a slightly different look but no improvement in error levels. We don’t recommend the uniformity compensation, because it cuts brightness and contrast by about half. And our sample didn’t need improvement, it aced our field tests. Also, the only way to reduce the color gamut to sRGB is by selecting the preset of the same name in the color temp menu. Unfortunately, that makes the white point visibly red. We recommend either using the Standard mode with a 10-click reduction in contrast, or performing a full calibration. The resulting numbers are about the same. And you’ll be viewing all content in the DCI-P3 gamut, which is more saturated than sRGB. Here are the settings we came up with.

AOC C4008VU8 Calibration Settings
Eco Mode
Brightness 200cd/m2
Brightness 120cd/m236
Brightness 100cd/m223
Brightness 80cd/m210
Color Temp User
Red 50, Green 53, Blue 52

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  • RobertGru
    Why not just buy an LG 43" 4K TV for $400.
  • venelin.mihaylov
  • sargentchimera
    I have a 43in Sony Bravia X800D TV I bought for ~$650, I bought it specifically for its size and HDR capability. If this had been out 8 months ago I think I would of bought it instead. The review mentioned not all HDR TVs fully benefit from their HDR, I wonder if mine is in that boat... I do notice a difference with it on but perhaps the effect is not as strong as it could be. I wonder if the picture would be better on this monitor.
  • JonDol
    When I saw the title I hoped for a second that the first 4K monitor that is worth the money has arrived. Too bad it isn't it.
  • Zerstorer1
    40" Samsung KU6300 HDR 4K 4:4:4 60 fps gaming for 399. Been using it for year as my personal desktop screen.
  • Zerstorer1
    I've been using a Samsung KU6300 for year now. Got it for 399. Heal of deal. Supports 4:4:4 and HDR 60 fps at 4k gaming.
  • hannibal
    Why so? This monitor is very well worth of its money!
    It is big and picture quality is nice!
    Even 27" 4K monitors cost almost 600-1000$
    And if it is any better... it is even more expensive.

    Hopefully we will get HDR and freesync version below 1500$ sooner than later. That would be bargain!
  • Brian_R170
    I bought a Samsung UN40KU6290 40-inch 4K TV last November from Costco for $289 to use as a monitor for my gaming system. There are usually a lot of trade-offs when using a TV as a monitor, and I agree that using a purpose-built computer monitor should always be better. Still, if you can find a TV that meets your own minimum requirements, you can save a LOT of money.
  • Brian_R170
    Zerstorer1, +1 on the KU6300. Reviews said it's the same as my KU6290 but has a fancy remote. The only thing I miss that a purpose-built computer monitor would have is auto-sensing the inputs to automatically power-on from standby. The KU will automatically go to standby after it senses all inputs are lost for a few minutes, but it doesn't power-on automatically.
  • Max_x2
    I'm wondering in the warm whites are often a problem with AOC. I returned one couple years because of that, and, you know, it kinda left a bad aftertaste.
  • AnimeMania
    I was hoping you would have included a close-up photo of the connection ports on the back, they look interesting.
    a 800$ monitor without HDR yea right
  • ahnilated
    I was tempted until I saw "curved". I am so sick of the curved crap.
  • irtehyar
    Please let curved finish dying already. :(
  • photonboy
    Why not 4K HDTV? They literally answer that question in the first paragraph.

    I don't think you can select resolutions like 2560x1440 either so it can be problematic for gaming.
  • bksk1932
    Hi ..Buy a Sony Bravo TV like $3.5k in 2007 ...print this article and then eat it....
    or rewrite it....
  • 10tacle
    Decent price for such a large 4K 10-bit monitor, but no HDR support and no Freesync is a deal killer. I'd have been willing to pay $200 more for HDR10 and Freesync support. Like many, I have an Xbox One X on pre-order and am in the market for a 4K HDR monitor to take advantage of it. Looking to replace the 32" 1080p desktop HDTV used for my PS4. I do not game in my living room where my 4K HDR10 TV is.
  • hannibal
    4K tv is not a monitor, even you can use it like monitor. There is big difference in there...
  • rwinches
    If you buy a large expensive monitor like this you are going to use a VESA mount that gives wide range of adjustment and stability.
    If there is no 'perfect monitor' then there is no point in the mention.
    Like their excellent 144Hz 1080p 24" monitor at $200 that they followed up with a same spec Freesync monitor for $220-$250 street (both favorably reviewed by Toms) I believe AOC will offer an improved version of this 4K for a reasonable price.
    Wow, what a weak list of cons and no recommendation?
    No gaming impressions? Is it only good for productivity SW?
    No pic of a bunch of apps open on the screen or a full screen spreadsheet or split screen?
  • zodiacfml
    The introduction is quite misleading leading me to think that this goes beyond 60Hz. This is no different from Philips' 40inch and above 4K monitors.
  • 10tacle
    191196 said:
    The introduction is quite misleading leading me to think that this goes beyond 60Hz. This is no different from Philips' 40inch and above 4K monitors.

    If you are referring to this opening paragraph comment:

    It’s not too hard to find a 40” or larger Ultra HD TV at the local wholesale club for less than $1000. But going this route can have a few downsides. First off, you won’t find a consumer TV with DisplayPort. And more importantly, most sets won’t accept signals above 60Hz, even if they refresh at a higher rate.

    They are referring to the extremely limited availability of 4K HDTVs <$1K with >60Hz refresh rate capability, and this one is no exception. That's the way I read it initially, but I now see where it can be interpreted that this set does run higher than 60Hz and is an ambiguous statement.
  • Zerstorer1
    Well that is debatable to a degree. My Samsung KU6300 has an option to specify that a PC card is hook up to it. Once it has done that, the 4:4:4 text mode kicks in for super crisp text and also enables full HDR for vivid deep color as well as 60 FPS / refresh at 3840x2160. My 1080 TI runs all my games at 4K at 60 FPS. Now obviously its capped at 60 FPS, but for $400 at a 40" screen with HDR. Plus I get to use 4K Netflix, 4K Hulu, 4k Amazon with multiple additional inputs. Kinda sinks the battle ship of these $1000+ dollar 28"-32" monitors they are hustling in my opinion. Now get this I have been reading that Samsung is bringing free-sync to their TV line up at the end of the year, although that's only good for AMD cards. So might switch to Vega next year and get another $400-500 Samsung that will have access to 144 refresh, plus all the previous mentioned goodies. Just my 2 cents.
  • photonboy
    2536519 said:
    Hi ..Buy a Sony Bravo TV like $3.5k in 2007 ...print this article and then eat it.... or rewrite it....

    I bought a Sony Bravia 32", 768p HDTV probably about 2007 and it's still going strong. Paid $3,500 (CDN) for the 768p as it was 5K for the 1080p version. Still pretty good picture.

    In fact, it has way better speakers than any HDTV today from what I can see (probably not much proportionate cost to use good speakers when the TV was so expensive).