Thunderbolt iMac Torn Down and Benchmarked

While Apple's new iMac models released yesterday appear nearly identical to their predecessors at first glance, the company has of course made a number of changes to beef up performance of its flagship desktop line.

100046 imac 2011 teardown 500

The folks over at iFixit quickly got their hands on one of the new 21.5-inch models and subjected it to one of their thorough teardown routines. Among the interesting findings:

100046 imac 2011 gpu board
Graphics board and heat sink from new 21.5-inch iMac

- The AMD graphics chip is located on a separate board from the main logic board, allowing for replacement of the GPU without the need for an entirely new logic board. Apple of course doesn't make the GPU board particularly easy to access, as it is not considered a user-replaceable part, but it can be done.

With a bit of magic, the GPU heat sink detaches from the logic board, exposing the AMD GPU board. You heard that right, folks - you don't have to replace the entire logic board if your GPU explodes from too much l33t gaming. You can just swap out the GPU board for another one.

-The new iMac features the same LG display found in the previous generation.

-The optional secondary solid state drive appears to reside directly underneath the optical drive.

The optional SSD appears to reside beneath the optical drive - that's the only space we could find where something was clearly missing. There's three mounting points under the optical drive that have nothing attached to them in our machine, since this option is only available on 2.7 GHz 21.5" iMacs.

The previous-generation iMacs only supported secondary SSD drives on 27-inch models, with the bay positioned next to the optical drive. The bay may still be in that location on the new 27-inch models, but Apple clearly had to find a different layout for the internal components in the smaller body of the 21.5-inch model in order to fit the drive in.

100046 imac 2011 speedmark

Separate from iFixit's teardown, reviewers have also begun benchmarking the new iMac models with Macworld having already put the new 3.1 GHz 27-inch model through its Speedmark 6.5 testing suite. Unsurprisingly, the machine was found to be significantly faster than the previous generation.

Our overall system performance test suite, Speedmark 6.5, shows the new system to be 16 percent faster than the previous high-end standard configuration iMac, a 27-inch 2.8GHz Core i5 quad-core model with a 1TB 7,200-rpm hard drive, and ATI Radeon HD 5750 graphics with 1GB of dedicated RAM.

Comparing to other machines, the new iMac clocked at about 10% faster than the standard high-end 15-inch MacBook Pro and about 15% slower than a build-to-order six-core Mac Pro.

Macworld will be subjecting the other three standard-configuration iMac models to the same battery of tests to provide comparison data.

Related Roundup: iMac
Buyer's Guide: iMac (Caution)
Related Forum: iMac

Top Rated Comments

lazyrighteye Avatar
149 months ago
Still impressed by what they manage to cram inside these machines...
Score: 5 Votes (Like | Disagree)
MacMan86 Avatar
149 months ago
Well, it's not jut CPU. Apple will not tell you SKU for any of the components. All iMac components are regular PC components so if a buyer knew the part list s/he would make an educated decision and iMac would lose every time.

I don't think it would be a surprise to anyone to hear there's a generous mark-up on Apple products. It's for the consumer to decide if that's worth paying for or not. There are market forces after all, if it was too expensive, not enough people would buy them - but that doesn't seem to be a problem they're having at the moment.

Still, they are more than the sum of their parts, other companies are free to pick those parts off the shelf and put together something the same or better than the iMac for less. None of the competitors have impressed me with their attempts so far though. I'd be interested to see the cost of the 27" IPS display as well, doesn't strike me as a bargain bucket component.
Score: 4 Votes (Like | Disagree)
Umbongo Avatar
149 months ago
Why won't they just give the cpu sku, it would make it much easier to compare than ghz values, with turbo, ht, vt enabled and what not.
Apple marketing don't think those things matter. You can find all the info easily at ark.intel.com and the information is in plenty of threads in the iMac subforum.

any care to fill out the rest?
21 inch base = Core i5 2400S
21 inch high = Core i5 2500S
21 inch bto = Core i7 2600S

27 inch base = Core i5 2500S
27 inch high = Core i5 2400
27 inch bto = Core i7 2600

Here is a link that compares all processors used: http://ark.intel.com/Compare.aspx?ids=52208,52211,52215,52207,52213
Score: 4 Votes (Like | Disagree)
err404 Avatar
149 months ago
What exactly is so "elegant" about requiring the disassemble of half the computer just to change out the GPU?
It's not meant to be user serviceable. It's sold as an "appliance". In order to achieve the slim profile and silent performance, the jigsaw construction is very similar to a laptop.

That said, the replaceable GPU is intriguing. The worrying bit is:
Making the LCD and glass spotless when reassembling the machine is nearly impossible.
I wonder if ThunderBolt is fast enough to allow an external GPU that exceeds the performance of the 6970m? Bus to external GPU. GPU to display via Target Display Mode.
Score: 3 Votes (Like | Disagree)
Shasterball Avatar
149 months ago
i wonder how much apple pays to assemble these? one would think it's cheaper to put a tower or something similar together than an all in one
Since when does Apple try to lower prices by making something less elegant and appealing to a wide audience? Price is no restrictor (compared to others)!!! :)
Score: 3 Votes (Like | Disagree)
MacMan86 Avatar
149 months ago
Magnetic ... glass isn't magnetic ... only iron, nickle, cobalt are magnetic. Your suggestions are even possible ... learn physics before you suggest crazy ideas like this.

Calm down, no need to be rude, especially given that the guy was right.

The glass panel is held on by magnets - I've probably taken apart 50 iMacs so I would have an idea.

The glass panel has a number of metal pins on metal flanges, glued on around its circumference. The aluminium front housing has holes for these pins with magnets on either side. The magnets on the housing attract the metal pins on the glass panel and keep everything together.

If you don't believe me, find something ferrous in your house and wave it around the edge of an iMac's glass panel, you'll notice it get attracted to the 10 or so magnets hidden behind.

What the guy is suggesting is possible, just very unlikely to happen because the bare LCD is so fragile.
Score: 2 Votes (Like | Disagree)

Popular Stories

apple watch ultra deuglify 1

Apple Watch Ultra User Mods Titanium Casing to 'Deuglify' Design

Tuesday September 27, 2022 8:05 am PDT by
An Apple Watch Ultra user has modified their new device's casing to add a brushed finish and remove the orange color of the Action Button in an effort to make it more visually appealing. The Apple Watch Ultra offers the first complete redesign of the Apple Watch since the product line's announcement in 2014, and while the design has been met with praise from many users, some have criticized...
Dark Sky App Featured

Dark Sky Removed From iOS App Store Ahead of Upcoming Shutdown

Wednesday September 28, 2022 4:27 pm PDT by
The Dark Sky weather app that's owned by Apple is no longer available for download in the U.S. App Store, suggesting that it has been removed ahead of schedule. Apple acquired Dark Sky back in March 2020 and has since incorporated elements of the app into the Weather app available on the iPhone (and soon, the iPad). Dark Sky remained available for purchase as a standalone weather app...
iphone 14 pro max vs 13 max 2

Camera Comparison: iPhone 14 Pro Max vs. iPhone 13 Pro Max

Thursday September 29, 2022 7:44 am PDT by
The iPhone 14 Pro and Pro Max introduce some major improvements in camera technology, adding a 48-megapixel lens and low-light improvements across all lenses with the new Photonic Engine. We've spent the last week working on an in-depth comparison that pits the new iPhone 14 Pro Max against the prior-generation iPhone 13 Pro Max to see just how much better the iPhone 14 Pro Max can be. Subscrib ...
apple watch ultra hammer test

YouTuber Tests Apple Watch Ultra Durability With a Hammer: Table Breaks Before the Watch

Sunday September 25, 2022 2:27 pm PDT by
A YouTuber has put Apple's claims for the durability of the Apple Watch Ultra to the test by putting it up against a drop test, a jar of nails, and repeated hits with a hammer to test the sapphire crystal protecting the display. TechRax, a channel popular for testing the durability of products, first tested the Apple Watch Ultra by dropping it from around four feet high. The Apple Watch...
tony blevins car

Apple Procurement VP Departs Company After Vulgar TikTok Comment

Thursday September 29, 2022 12:38 pm PDT by
Tony Blevins, Apple's vice president of procurement, is set to depart the company after he made a crude comment about his profession in a recent TikTok video, reports Bloomberg. Blevins was in a video by TikTok creator Daniel Mac, who was doing a series on the jobs of people he spotted with expensive cars. After seeing Blevins in an expensive Mercedes-Benz SLR McLaren, Mac asked Blevins what ...
iPhone 14 Pros in Hand Black Background Feature

Verizon iPhone 14 Pro Customers Reporting Cellular Connection Issues

Monday September 26, 2022 6:23 am PDT by
iPhone 14 Pro customers on the Verizon network in the U.S. are reporting issues with slow and unreliable 5G cellular connections and calls randomly dropping. Several threads on Reddit (1,2,3) and the MacRumors forums chronicle issues faced by Verizon customers and Apple's latest iPhone. According to user reports, signal strength on the iPhone 14 Pro is unreliable and weak, while other...
iPhone 15 to Switch From Lightning to USB C in 2023 feature sans arrow

Kuo: iPhone 14 Pro Max Popularity Could Lead to More Differentiation Between iPhone 15 Pro and iPhone 15 Pro Max

Wednesday September 28, 2022 10:22 am PDT by
Apple has seen high demand for the 6.7-inch iPhone 14 Pro Max, which could lead the company to further differentiate the next-generation iPhone 15 Pro and Pro Max, according to Apple analyst Ming-Chi Kuo. Apple could add exclusive features to the iPhone 15 Pro Max in an effort to encourage more people to purchase the larger and more expensive device. Kuo last week said that Apple asked...
iPhone 14 Pro Sports Scores Dynamic Island

iPhone 14 Pro Features Live Sports Scores in Dynamic Island on iOS 16.1

Monday September 26, 2022 7:52 am PDT by
Earlier this month, Apple announced that iOS 16.1 will enable a new Live Activities feature that allows iPhone users to stay on top of things that are happening in real time, such as a sports game or a food delivery order, right from the Lock Screen. On the iPhone 14 Pro and Pro Max, Live Activities also integrate with the Dynamic Island. Premier League match in Dynamic Island via Paul Bradford ...
iOS 16

Everything New in the Latest iOS 16.1 and iPadOS 16.1 Betas: Stage Manager Expansion, Wallpaper Tweaks and More

Tuesday September 27, 2022 11:36 am PDT by
Apple today released new betas of iOS 16.1 and iPadOS 16.1 to developers, tweaking some of the functionality that's been introduced in prior betas and in the case of iPadOS 16.1, adding a major new feature to Stage Manager. We've rounded up everything new in both betas below. Wallpaper Updates Apple has updated the Wallpaper section of the Settings app to allow users to swap between...
General iOS 16 Feature Yellow

Some iOS 16 Users Continue to Face Unaddressed Bugs and Battery Drain Two Weeks After Launch

Monday September 26, 2022 7:34 am PDT by
Today marks exactly two weeks since Apple released iOS 16 to the public. Besides the personalized Lock Screen, major changes in Messages, and new features in Maps, the update has also seen its fair share of bugs, performance problems, battery drain, and more. After major iOS updates, it's normal for some users to report having issues with the new update, but such reports usually subside in...