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Apple LED Cinema Display (27-inch) vs Dell UltraSharp U2717D

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

Better figure, where one is clearly better

AppleLED Cinema Display (27-inch)DellUltraSharp U2717D
Overview
ReleasedSeptember 20102016
Display
Screen size27″27″
Resolution2560 × 1440 (QHD)2560 × 1440 (QHD)
Sharpness109 pixels per inch109 pixels per inch
PanelIPSIPS (LED-backlit IPS-type LCD; TFTCentral identified a Samsung PLS panel in its sample.)
Refresh rate60 Hz60 Hz
Response time (grey to grey)–6 ms
Brightness (typical)375 nits350 nits
Contrast ratio1,000:11,000:1
Colour range–99% sRGB
Colour accuracy (Delta E)–Below 2
Screen finishGlossyMatte
ShapeFlatFlat
Colour depthUp to 16.7 million colours; panel bit depth is not specified16.7 million colours, according to Dell.
sRGB coverage–99% typical, according to Dell.
Colour accuracy–Factory calibrated to average Delta E < 2, according to Dell.
Response time detailTypical 12 ms without a specified transition; omitted from the grey-to-grey row8 ms grey-to-grey in Normal mode; 6 ms in Fast mode, according to Dell.
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, 2 × DisplayPort 1.2
USB-C chargingNoneNone
USB ports3 × USB-A4 × USB-A
SpeakersYesNo
HDMI detail–One HDMI input with MHL support.
WebcamiSight camera with microphone–
DisplayPort detailCaptive Mini DisplayPort cable; audio support depends on the host MacOne DisplayPort input, one Mini DisplayPort input and one DisplayPort MST output.
Daisy chaining–DisplayPort MST output supports one additional 2560 × 1440 60 Hz monitor, according to Dell.
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 USB 3.0 downstream Type-A ports and one upstream port; one downstream port supports BC 1.2 charging.
Audio out–Stereo audio line out for speakers; Dell says headphones are unsupported.
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Webcam detailBuilt-in iSight; maker specifications do not publish a megapixel figure–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, pivot
VESA mountYesYes
Weight with stand10.7 kg4.5 kg
Height adjustment–130 mm.
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.611.3 × 200.3 × 410.2–540.2 mm (width × depth × height).
Size without stand–611.3 × 48.3 × 355.6 mm (width × depth × height).
Weight without stand–4.5 kg, without cables.
ControlsBrightness, colour profile and calibration through Mac OS X Displays preferences; no physical image controls (Macworld)–
ColoursAluminium enclosure with black glass bezel–
Power and support
Power useMaximum 250 W while charging a MacBook Pro; energy saver 1 W or less26 W typical, 74 W maximum with USB active, according to Dell.
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 UKENERGY STAR and TCO Certified Displays; EPEAT registration varies by country.
In the boxDisplay, AC power cord and printed documentation–

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