Since Thunderbolt ports can support up to six peripherals in a daisy chain, which is a wiring scheme where multiple devices are chained together in a certain order, Macworld decided to test how many devices they could daisy chain together with the new Mac Pro's six Thunderbolt ports, four USB 3.0 ports, one HDMI port and two gigabit Ethernet ports.

daisychainmacpro
Macworld named the test the "Mac Pro Daisy Chain Challenge" and was able to connect a total of 42 peripheral devices to the Mac Pro.

We connected 36 drives (19 Thunderbolt, 15 USB, 2 FireWire 800) with a combined capacity of 100.63TB. In addition to the drives, we also connected two Thunderbolt docks (the Belkin Thunderbolt Express Dock and the CalDigit Thunderbolt Station, an Apple Thunderbolt Display, two Apple Cinema Displays, and one HP Z Display Z27. All this to a single Mac Pro.

Only a dozen of the drives were being powered from the cables connecting them to the Mac Pro. The 24 remaining drives required external power and had to be plugged into three power strips with an attached Watts Up power meter. The combine power draw when Macworld ran a script that copied data from the Mac Pro's internal flash storage to the drives was 865 Watts.

Through Mac OS X's Activity Monitor, the lab found that there was a combined throughput of 3 Gbps. The rate slowed as the fastest drives, of which OWC's Mercury Helios was the fastest, finished transferring data.

The lab also found that the daisy chains didn't affect the performance of a single drive working alone. Rather, the location of the drive within the daisy chain affected performance. For instance, one drive's average write speed was 709.8 Mbps when tested at the beginning of the daisy chain and without a daisy chain and only 556.7 Mbps when placed at the end of the chain.

The full list of devices connected to the Mac Pro, along with more information on the challenge and future tests can be found at Macworld.

Top Rated Comments

Mr. Retrofire Avatar
91 months ago
42 Peripheral Devices Connected to One 2013 Mac Pro
Typical for the new age.


This is a more realistic picture:

[thanks to user "cc bcc" @ arstechnica]
Score: 38 Votes (Like | Disagree)
CartoonHeroII Avatar
91 months ago
42 - The answer to life ;)
Score: 26 Votes (Like | Disagree)
spyguy10709 Avatar
91 months ago
What a freaking mess.
Score: 25 Votes (Like | Disagree)
Peace Avatar
91 months ago
I am impressed. More by the amount of money that would cost rather than the number of devices connected.
Score: 21 Votes (Like | Disagree)
puckhead193 Avatar
91 months ago
They spent all there money on peripheral's and forgot to buy a chair and desk... :rolleyes:
Score: 19 Votes (Like | Disagree)
saintforlife Avatar
91 months ago
Can't innovate my ass.
Score: 16 Votes (Like | Disagree)

Top Stories

april 2021 event coverage feature

Apple Event Live Coverage: New iPads, AirTags, and More Expected [Event Over]

Tuesday April 20, 2021 9:07 am PDT by
Apple's virtual "Spring Loaded" event kicks off today at 10:00 a.m. Pacific Time, with Apple expected to debut updated iPad models and perhaps some other hardware such as AirTags or iMac models based on Apple silicon. Apple is providing a live video stream on its website, on YouTube, and in the company's TV app across its platforms. We will also be updating this article with live blog...
m1 imac colors

Apple Announces Redesigned iMac With M1 Chip and Seven Color Options

Tuesday April 20, 2021 10:22 am PDT by
Apple has announced a new, redesigned 24-inch iMac, featuring an M1 chip, a 4.5K display, and a range of color options, as well as an improved cooling system, front-facing camera, speaker system, microphones, power connector, and peripherals. The new iMac features a completely new compact design, and comes in a range of seven striking colors, including green, yellow, orange, pink, purple,...
iphone 12 preorder purple

Apple Launching iPhone 12 and 12 Mini in New Purple Color on April 30

Tuesday April 20, 2021 10:08 am PDT by
Apple today announced that the iPhone 12 and iPhone 12 mini will be available in a new purple color starting April 30, with pre-orders starting this Friday. Apple is also releasing a new MagSafe Leather Case and Leather Sleeve in Deep Violet, a Silicone Case in Capri Blue, Pistachio, Cantaloupe, or Amethyst, and a Leather Wallet in Arizona, all available to order beginning today. iPhone...
14

Apple Says iOS 14.5 Will Be Released 'Next Week'

Tuesday April 20, 2021 11:08 am PDT by
Apple today in a press release about its new AirTag item tracker announced that iOS 14.5 and iPadOS 14.5 will be available starting "next week." iOS 14.5 and iPadOS 14.5 are packed with new features, including the ability for iPhone users who are wearing an Apple Watch to unlock the iPhone with Face ID while wearing a mask. iOS 14.5 and iPadOS 14.5 will also be the minimum software versions...
ipad pro with m1 chip

Apple Introduces Next-Generation iPad Pro With M1 Chip, Thunderbolt, 5G, XDR Display, and More

Tuesday April 20, 2021 10:40 am PDT by
Apple today announced the next-generation iPad Pro with the same M1 chip found in the latest Macs, Thunderbolt and USB4 support, 5G connectivity on cellular models with mmWave support in the United States, and more. With an 8-core CPU and 8-core GPU, Apple says the M1 chip in the new iPad Pro provides up to 50% faster performance and up to 40% faster graphics compared to the A12Z Bionic chip ...
f1618938547

Apple Announces AirTag Tracking Devices Starting At $29 Each

Tuesday April 20, 2021 10:10 am PDT by
Apple today announced AirTag, a Tile-like Bluetooth tracking device that's designed to be attached to items like keys and wallets for tracking purposes, letting you find them right in the Find My app. AirTags are accessories for attaching to backpacks, luggage, and other items. Any U1 device like the iPhone 12 can be used for precision finding to guide you right to the item you're looking...
Ports 2021 MacBook Pro Mockup Feature 1 copy

Stolen MacBook Pro Schematics Confirm Apple's Plans to Add More Ports and Remove Touch Bar

Wednesday April 21, 2021 10:31 am PDT by
Schematics stolen from Apple supplier Quanta Computer outline Apple's plans for the next-generation MacBook Pro models that are expected in 2021, and clearly confirm plans for additional ports and a return to MagSafe. MacRumors saw the schematics after they were leaked online, and some of them feature the logic board of the next-generation MacBook Pro. On the right side of the machine,...
iPad Pro

New 12.9-Inch iPad Pro Will Be 0.5mm Thicker to Accommodate Mini-LED Display

Monday April 19, 2021 11:30 am PDT by
The upcoming 12.9-inch iPad Pro will be thicker than the previous-generation version, likely due to the inclusion of the mini-LED display. We've heard several rumors about the change in thickness, and now leaked design images have confirmed it. A source that designs accessories for Apple devices sent MacRumors a series of photos that feature exact dimensions for the new iPad Pro models, and...
iPad Pro Feature Orange

Wedbush Analysts Say 'Spring Loaded' Event Will Debut New iPads With 'Modest Price Increase,' Along With 'a Few Surprises'

Monday April 19, 2021 6:37 am PDT by
Apple is planning to launch a new entry-level iPad, iPad mini, and iPad Pro at its "Spring Loaded" event tomorrow, along with "a few surprises," according to Wedbush analysts. In a new note to investors, seen by MacRumors, Wedbush analysts Daniel Ives and Strecker Backe explained that the iPad will be the main focus of Apple's "Spring Loaded" event, with new entry-level iPad, iPad mini, and ...
maxresdefault

Apple Event 2021: Everything Apple Announced at Its 'Spring Loaded' Event in Just 6 Minutes

Tuesday April 20, 2021 4:23 pm PDT by
Apple today held its first event of 2021, and it was one of the most exciting events that we've seen in some time. Apple announced a whole slew of new products, including an M1 iMac, an M1 iPad Pro, a refreshed 4K Apple TV, and the long-awaited AirTags. Subscribe to the MacRumors YouTube channel for more videos. It took Apple an hour to introduce all of the new devices during its virtual...