Bananas for Scale
Server Rack (42U Standard)

Photo from Wikimedia Commons

Server Rack (42U Standard)

The steel skeleton of the internet/Computing

A standard 42U server rack stands about 2 meters tall and can hold up to 42 rack-mounted servers. A fully loaded rack can weigh over a ton, consume 20 kilowatts of power, and generate enough heat to warm a small apartment. Data centers contain thousands of these, stacked in rows like the library stacks of the digital age.

Measurements

Height2 m
125Dice edges
2.5Folding chair heights
1.02Dwayne The Rock Johnsons

42U rack units

Width6 tenths m
3.16No. 2 pencils
3.3 tenthsStep ladder heights
5.2 tenthsGolf drivers

Standard 600 mm

Depth1.07 m
1.19Arming swords
6.2 tenthsYoga mat lengths
198 trillionCarbon nuclei

Standard 1070 mm

Fully loaded weight1,200 kg
81.7 millionthsBrooklyn Bridge masses
1 tenthsEmpty dump trucks
800Textbooks

Varies widely

Typical power consumption20,000 W
133Refrigerator compressors
1,000Resting brains

20 kW fully loaded

Typical storage capacity5 quadrillion B
18 trillionTweets
25.2 billionScanned pages

Petabytes with dense config

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