Power Consumption

With the U2711 Dell opted for a CCFL backlight to deliver a wider color gamut. Apple moved to LED to reduce the size of the display's chassis and cut power consumption. Even while charging a MacBook Pro and running at full brightness the 27-inch LED Cinema Display never got more than warm. Part of this is due to the vent in the back of the display:

The display is also just generally power efficient:

LCD Power Draw (Kill-A-Watt)

The 27-inch LED Cinema Display tops out at 98W at full brightness, only saving about 14W compared to my old 30. The power efficiency is greatly improved however. At 98W you get a brighter display than almost anything on the list. Note that this is peak power consumption without a notebook attached to the MagSafe port. I plugged a 2010 15-inch MacBook Pro that was nearly dead and measured a max power draw of 166W at the wall for the display + charging the notebook.

LCD Power Draw (Kill-A-Watt)

At the lowest brightness setting the new Cinema Display sips power, 23W to be exact. You can even go up to 50% brightness (~100 nits) and never pull more than 40W at the wall.

Processing and Input Latency Final Words
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  • kukuuu - Tuesday, January 25, 2011 - link

    Ive heard that windows doesnt work and thus there might not be gaming from my pc. Also the minidisplay issue means ,im not sure about it at al :(
  • bcron - Tuesday, April 19, 2011 - link

    Hello,

    First of all: thanks for your test – it is by far the best I could find!

    I have the first version of the 30" Cinema Display and would like to buy a new display. I am using my 30" primarily for image and video processing, and photo printing (with an Epson Stylus Photo R3000).

    My question is: Do you think that the 27" is better, worse or equal to the 30" (first version) for photography and image processing? (I am not talking about the glare/nonglare-discussion but only about colour accuracy for image editing and photo printing)

    From what I´ve seen from your test the 27" seems to have a better colour space: 83.16% vs 72.96% for the 30". (By the way, is there a way to measure the actual color space of my display? I have a DTP94 colorimeter and use iColorDisplay and basiCColor, but I could not find an option to measure the colour space in percentage of Adobe RGB)

    At a setting of 100cd/m2 (for photo printing) the 27" has a deltaE of 2.2. But in this diagram there is no comparable value of the 30" display.

    Is 2.2 good enough for professional photo printing? I do know that there are better displays but what I do not know is: how big is the difference, eg. compared to a deltaE of 1.1 really – in terms of human perception?

    Thanks!

    B.C.
  • dffs - Thursday, December 11, 2014 - link

    There are several things wrong with this monitor. First, of course, the price. Other monitors, such as the Dell UltraSharp 27, appear to use the same screen, and have a street price of nearly half of this one. Although the aluminum case is lovely, it seems impossible to justify the price differential. Second, its height is not adjustable. This is a serious drawback if, for example, you want to use it as an external monitor with an iMac. Third, a good monitor needs its own color controls, featuring RGB sliders. The only way to adjust colors on a Mac monitor is by that exceedingly lame Colors section of the Displays control panel. It's high time Apple gives us something better.

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