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Apple LED Cinema Display (27-inch) vs Dell UltraSharp U2715H

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

Better figure, where one is clearly better

AppleLED Cinema Display (27-inch)DellUltraSharp U2715H
Overview
ReleasedSeptember 20102014
Display
Screen size27″27″
Resolution2560 × 1440 (QHD)2560 × 1440 (QHD)
Sharpness109 pixels per inch109 pixels per inch
PanelIPSIPS
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 3
Screen finishGlossyMatte
ShapeFlatFlat
Colour depthUp to 16.7 million colours; panel bit depth is not specified16.78 million colours
sRGB coverage–99%
Colour accuracy–Factory calibrated to average Delta E ≤ 3.
Response time detailTypical 12 ms without a specified transition; omitted from the grey-to-grey row6 ms grey-to-grey in Fast mode; 8 ms in Normal mode (Dell). TFTCentral found Fast introduced overshoot on its sample.
Viewing angles178° horizontally and vertically178° horizontal and vertical (typical).
Pixel pitch–0.2331 mm.
Eye careAmbient light sensor adjusts brightness automaticallyAnalogue backlight dimming for a flicker-free display, according to Dell.
Connections
Video inputsMini DisplayPort2 × HDMI 1.4, 2 × DisplayPort 1.2
USB-C chargingNoneNone
USB ports3 × USB-A5 × USB-A
SpeakersYesNo
HDMI detail–Two HDMI 1.4 inputs with MHL 2.0 support.
WebcamiSight camera with microphone–
DisplayPort detailCaptive Mini DisplayPort cable; audio support depends on the host MacOne DisplayPort 1.2 input, one Mini DisplayPort input and one DisplayPort 1.2 MST output.
Daisy chaining–DisplayPort 1.2 MST output; Dell lists one additional QHD 60 Hz display or two lower-resolution displays.
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.Five downstream USB 3.0 Type-A ports and one upstream USB 3.0 Type-B port; one downstream port supports BC 1.2 charging.
Audio out–Audio line out for external speakers; Dell says it does not support headphones.
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Webcam detailBuilt-in iSight; maker specifications do not publish a megapixel figure–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
Height adjustment–115 mm.
Tilt–-5° to 21°.
Swivel–-45° to 45°.
Pivot–-90° to 90°.
Weight with stand10.7 kg–
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.612.7 × 205.0 × 409.9–524.9 mm (width × depth × height).
Size without stand–612.7 × 46.4 × 363.4 mm (width × depth × height).
Weight without stand–4.91 kg, without cables.
ControlsBrightness, colour profile and calibration through Mac OS X Displays preferences; no physical image controls (Macworld)Touch-sensitive front buttons and on-screen display.
ColoursAluminium enclosure with black glass bezelBlack front frame and silver stand.
Power and support
Power useMaximum 250 W while charging a MacBook Pro; energy saver 1 W or less36 W typical, 88 W maximum with USB active; less than 0.5 W in standby.
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.Dell Display Manager.
CertificationsENERGY STAR 5.0; EPEAT Gold in the US, Canada, France, Germany and UKEPEAT Gold and TCO Certified Displays, according to Dell.
In the boxDisplay, AC power cord and printed documentationStand, power cable, Mini DisplayPort-to-DisplayPort cable, USB 3.0 upstream cable, factory calibration report and documentation.

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