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


View All Comments

  • piroroadkill - Tuesday, September 28, 2010 - link

    Also, the new Dell OSD controls are awesome. Proximity sensor with glowing controls? Bitching. Reply
  • BZDTemp - Tuesday, September 28, 2010 - link

    Agree but it would have been nice to see the review compare the Dell and the Apple more especially since afaik there are no other displays like them.

    I for one am certainly loving my U2711. I would have liked split-picture function to be an adjustable Picture-in-picture function and the gaming mode is stupid but other than those small details I have no issues. It's hooked up to a PC, a Mac, a PS3 and a 360 all on the same time - great stuff.

    I dream of even more pixels per inch2, but for now the U2711 and the 27" Apple are the best choices bringing even more pixels per inch2 than a 30" panel. When someone makes a "retina" display in 27"+ size it will be a good day :-)
  • ijhammo - Tuesday, September 28, 2010 - link

    he he, can you imagine the cost of a 27" retina display!!!! Reply
  • BZDTemp - Thursday, September 30, 2010 - link

    For sure it would cost an impossible amount at first but as with all tech the prices will come down. For example back some 2.5+ decades ago or so my dad paid something $8,000 for a phone the size of a small suitcase and now...

    Or to stay with computers. The first one I bought back when I was a kid cost $500, it had 1 KB memory total and for display I used an old TV and storage was a audio tapedeck. In other words some day... :-)
  • ijhammo - Wednesday, October 6, 2010 - link

    yeah, one day!! And we'll be here reminiscing how a an base 8 core Mac Pro cost $3000 whilst talking about the new faster than light optical processors....

    Gotta love technology :-)
  • ijhammo - Tuesday, September 28, 2010 - link

    Well that depends really on use. I would like a 27" screen with as few as cables as possible to use in a fairly limited space. So a monitor with built in speakers and a charger for my laptop seems like a reasonable choice.

    If ultimate colour quality etc is the goal though, surely you wouldn't even go for the 2711?
  • BZDTemp - Thursday, September 30, 2010 - link

    I must admit to not knowing enough about colours to truly judge my U2711 but it is the first LCD that I have seen come close to my trusted old Sony GDM-F520 (a 21" CRT and perhaps the best CRT ever made).

    Most likely you can get better colour control with a high end EIZO or something like that but these new 27" panels offer finer pixels so it depends on what you're needs are.
  • IceDread - Tuesday, September 28, 2010 - link

    I really disslike 16:9, a 16:9 27" is just like a 24" 16:10. The loss of height in the 16:9 aspect is huge and very annoying.

    I also do not like the reflection that can occur to easily and distract me on the apple screens. It may look good at first but it's really annoying when using it.
  • BZDTemp - Thursday, September 30, 2010 - link

    You forget that while the physical size is not as a 30" the 27" still offers a lot more pixels than a 24" 16:10 and the pixels are smaller as well.

    Check out the Dell U2711 to avoid the reflection hell (and gain a lot of nice features)
  • AstroGuardian - Tuesday, September 28, 2010 - link

    "For some reason color tracking in the lower left of the screen was measurably worse than anywhere else."

    Guess what...

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