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Apple LED Cinema Display (27-inch) vs Dell UltraSharp U2711

Every spec side by side, from each maker's published figures.

Better figure, where one is clearly better

AppleLED Cinema Display (27-inch)DellUltraSharp U2711
Overview
ReleasedSeptember 20102010
Display
Screen size27″27″
Resolution2560 × 1440 (QHD)2560 × 1440 (QHD)
Sharpness109 pixels per inch109 pixels per inch
PanelIPSIPS (CCFL-backlit wide-gamut IPS.)
Refresh rate60 Hz60 Hz
Response time (grey to grey)–6 ms
Brightness (typical)375 nits350 nits
Contrast ratio1,000:11,000:1
Colour range–100% sRGB; 96% Adobe RGB
Colour accuracy (Delta E)–Below 5
Screen finishGlossyMatte
ShapeFlatFlat
Colour depthUp to 16.7 million colours; panel bit depth is not specifiedUp to 1.07 billion colours with 12-bit internal processing, according to Dell.
sRGB coverage–100% typical, according to Dell.
Adobe RGB coverage–96% typical, according to Dell.
Colour accuracy–Factory-calibrated sRGB and Adobe RGB presets to average Delta E below 5 on a new unit, according to Dell.
Colour modes–Includes sRGB, Adobe RGB and a six-axis Custom Color mode.
Response time detailTypical 12 ms without a specified transition; omitted from the grey-to-grey row6 ms grey-to-grey or 12 ms black-to-white, typical.
Viewing angles178° horizontally and vertically178° horizontal and vertical, typical.
Pixel pitch–0.2331 mm.
Eye careAmbient light sensor adjusts brightness automatically–
Connections
Video inputsMini DisplayPortHDMI, DisplayPort
USB-C chargingNoneNone
USB ports3 × USB-A4 × USB-A
SpeakersYesNo
HDMI detail–One HDMI input; Dell lists up to 1080p video modes in its manual.
WebcamiSight camera with microphone–
DisplayPort detailCaptive Mini DisplayPort cable; audio support depends on the host MacOne DisplayPort input; also two dual-link DVI-D inputs, VGA, composite and component video.
USB hub detailThree powered USB 2.0 Type-A ports; upstream USB cable required for data, camera, microphone and speakers. Device charging works without a host connected.Four downstream USB 2.0 ports and one upstream port; integrated multi-format card reader.
Picture by picture–Picture-in-picture and picture-by-picture modes with a second video source.
Audio out–Audio line out for external speakers; optional Dell soundbar support.
Speaker detailBuilt-in 2.1 system with 49 W output–
Webcam detailBuilt-in iSight; maker specifications do not publish a megapixel figure–
Design
Stand adjustsTiltHeight, tilt, swivel
VESA mountYesYes
Weight with stand10.7 kg7.72 kg
Height adjustment–90 mm vertical extension, according to Dell.
VESA patternRequires the separately sold Apple VESA Mount Adapter Kit100 × 100 mm.
Size with standCurrent UK specifications give 650 × 491 × 207 mm (width × height × depth). Original manual gives 651.7 × 488.1 × 208.13 mm; both give 10.7 kg.646.71 × 199.95 × 427.83–517.83 mm (width × depth × height).
Size without stand–646.71 × 93 × 385.67 mm (width × depth × height).
Weight without stand–7.72 kg without cables.
ControlsBrightness, colour profile and calibration through Mac OS X Displays preferences; no physical image controls (Macworld)Capacitive touch controls at the front right.
ColoursAluminium enclosure with black glass bezel–
Power and support
Power useMaximum 250 W while charging a MacBook Pro; energy saver 1 W or less113 W typical, according to Dell's manual.
Power supplyInternal power supply; 100–240 V AC, 50–60 Hz100–240 V AC, 50/60 Hz.
Laptop chargingSeparate captive universal MagSafe connector supplies up to 85 W; no USB-C power delivery–
SoftwareOriginal requirement Mac with Mini DisplayPort and Mac OS X 10.6.4 or later. July 2010 announcement specifies September availability.–
CertificationsENERGY STAR 5.0; EPEAT Gold in the US, Canada, France, Germany and UK–
In the boxDisplay, AC power cord and printed documentationMonitor and stand, power, VGA, DVI, DisplayPort and USB upstream cables, documentation and factory colour report.

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