New MacBook Air Using Scaled-Down Thunderbolt Chip

macbook air 2011 eagle ridge
Portion of MacBook Air motherboard with Eagle Ridge chip outlined in teal (Source: iFixit)

AnandTech takes a look at the Thunderbolt controller used by Apple in the new MacBook Air, finding that the company has opted to use a scaled-down "Eagle Ridge" controller chip from Intel instead of the "Light Ridge" chip found in larger Thunderbolt-enabled machines.

[Light Ridge] features four Thunderbolt channels (4 x 10Gbps bidirectional = 80Gbps aggregate bandwidth) and up to two DisplayPort outputs. It's used in the 2011 iMac, MacBook Pro and Mac mini. ...

Eagle Ridge is available in two form factors (normal and SFF [small form factor]) and is effectively half of a Light Ridge chip. That means you only get two Thunderbolt channels and one DP output. Apple used the small form factor version of Eagle Ridge in its new MacBook Air to cut cost and save on motherboard real estate.

With Eagle Ridge only supporting a single DisplayPort output, MacBook Air users are only able to drive a single external display via the Thunderbolt port, although the machine's integrated Intel HD Graphics 3000 would also preclude the use of two external monitors on the MacBook Air as it does on the 13-inch MacBook Pro.

Thunderbolt adoption has thus far been limited to high-end devices in part due to high costs associated with inclusion of the technology. Use of the scaled-down Eagle Ridge controller could help push Thunderbolt into lower-end products, presuming that the smaller chip carries some cost savings for manufacturers.

Related Roundup: MacBook Air
Related Forum: MacBook Air

Popular Stories

iPhone SE 4 Vertical Camera Feature

iPhone SE 4 Rumored to Use Same Rear Chassis as iPhone 16

Friday July 19, 2024 7:16 am PDT by
Apple will adopt the same rear chassis manufacturing process for the iPhone SE 4 that it is using for the upcoming standard iPhone 16, claims a new rumor coming out of China. According to the Weibo-based leaker "Fixed Focus Digital," the backplate manufacturing process for the iPhone SE 4 is "exactly the same" as the standard model in Apple's upcoming iPhone 16 lineup, which is expected to...
iPhone 17 Plus Feature

iPhone 17 Lineup Specs Detail Display Upgrade and New High-End Model

Monday July 22, 2024 4:33 am PDT by
Key details about the overall specifications of the iPhone 17 lineup have been shared by the leaker known as "Ice Universe," clarifying several important aspects of next year's devices. Reports in recent months have converged in agreement that Apple will discontinue the "Plus" iPhone model in 2025 while introducing an all-new iPhone 17 "Slim" model as an even more high-end option sitting...
iPhone 16 Pro Sizes Feature

iPhone 16 Series Is Just Two Months Away: Everything We Know

Monday July 15, 2024 4:44 am PDT by
Apple typically releases its new iPhone series around mid-September, which means we are about two months out from the launch of the iPhone 16. Like the iPhone 15 series, this year's lineup is expected to stick with four models – iPhone 16, iPhone 16 Plus, iPhone 16 Pro, and iPhone 16 Pro Max – although there are plenty of design differences and new features to take into account. To bring ...
Apple TV Plus Feature 2 Magenta and Blue

Apple TV+ Curbs Costs After Expensive Projects Fail to Capture Viewers

Monday July 22, 2024 5:11 am PDT by
Apple is scaling back its Hollywood spending after investing over $20 billion in original programming with limited success, Bloomberg reports. This shift comes after the streaming service, which launched in 2019, struggled to capture a significant share of the market, accounting for only 0.2% of TV viewership in the U.S., compared to Netflix's 8%. Despite heavy investment, critical acclaim,...
bsod

Microsoft Blames European Commission for Major Worldwide Outage

Monday July 22, 2024 11:55 am PDT by
Last Friday, a major CrowdStrike outage impacted PCs running Microsoft Windows, causing worldwide issues affecting airlines, retailers, banks, hospitals, rail networks, and more. Computers were stuck in continuous recovery loops, rendering them unusable. The failure was caused by an update to the CrowdStrike Falcon antivirus software that auto-installed on Windows 10 PCs, but Mac and Linux...

Top Rated Comments

Vol7ron Avatar
170 months ago
Woah there.....

First off, this is about the Macbook Air, not the Macbook Pro. The Air has considerably less room inside of it then the Pro model does.

Second, this really doesn't mean that it is crippled. It just means that can only have one extra display hooked up to it. Kinda like how the previous Air models were and the previous iMac and MacBook Pro models were before Thunderbolt came a long.

This is first generation technology. It will get refined and i bet that we will see the quad channels eventually.

My question to you is, how are you going to use 4GB of bandwidth per second? Only my VMware ESXi servers use dual 10G fiber cards. I mean, that is a lot of data moving back and forth. Most people would never come even close to utilizing that much bandwidth. So to say that the device is crippled is ridiculous....
Score: 8 Votes (Like | Disagree)
ovrlrd Avatar
170 months ago
I was more enthusiastic about this Air refresh (I have the previous generation with the 320M GPU), but every day there's a piece of news about how it's not sooo amazing as expected: Different SSD models ("did you get the fast one?"), integrated GPU "almost as good" as nVidia offer, and now a thunderbolt port that's, let's face it, crippled down compared to other Macs.

To me it just sounds like you are trying to make yourself feel better about having a previous generation. There is nothing wrong with doing that mental justification if it helps you, but the reality it is still a fantastic update to the MBA line.

The GPU thing is unavoidable due to licensing, and while the HD 3000 isn't as impressive on paper, it still performs well enough. The simple fact is that nobody is going to be doing high-end GPU work on the MBA because of battery constraints. Gaming has always been a "bonus" achievement, and never a requirement.

The different SSD models is the most overrated debate ever, there is absolutely no practical difference between the two drives, and the only people upset are people who run benchmarks all day long to inflate their ego.

Finally, this news about the Thunderbolt chip, you need to understand that this is not a gimped Thunderbolt, or less powerful. It still does the 10Gbps requirement of Thunderbolt, and that is all that really matters. You aren't going to be daisy chaining 5 devices that can make use of 100% of the bandwidth on the MBA. It's simply just not a situation that would ever happen. Having 2 channels at 10Gbps means that you can drive one display, plus any number of devices that could use up to 20Gbps (thats a TON) of bandwidth. To put that into perspective, you would need ~2000 Blu-rays running at the exact same time to saturate that kind of bandwidth. That's an insane amount of bandwidth, and the fact that you think it's "gimped" is hilarious.
Score: 7 Votes (Like | Disagree)
DrJohnnyN Avatar
170 months ago
Boom.

"Anandtech’s report also notes that the MacBook Air’s cheaper chip is likely to be the one used by PC makers who are making machines traditionally less expensive than those from Apple."
Score: 7 Votes (Like | Disagree)
solgae Avatar
170 months ago
According to CultofMac.com: "The scaled down Thunderbolt chip used in the new MacBook Airs, however, is named Eagle Ridge, and features only two Thunderbolt channels — meaning it’s half as fast — with support for just one external display."

This doesn't mean you have half the bandwidth available for Eagle Ridge - you still have bidirectional 10Gbps interface for both Eagle Ridge (MBA version of thunderbolt) and Light Ridge (MBP/iMac version of thunderbolt). It only means Eagle Ridge has one displayport interface for external display as opposed to two on Light Ridge. If you look at the anandtech's test result with the Pegasus array, you'll see that both MBA and MBP perform practically the same.
Score: 5 Votes (Like | Disagree)
basesloaded190 Avatar
170 months ago
Thunderbolt is so overrated. Apple should adopt USB3.0 asap.
Thunderbolt is not supposed to replace USB 3.0, it's meant to supplement it. Thunderbolt has so many more capabilities compared to USB.
Score: 5 Votes (Like | Disagree)
justinfreid Avatar
170 months ago
This seems like reasonable product differentiation to me.
Besides, only a small minority of users will ever drive 2 external displays from their laptop.
Score: 4 Votes (Like | Disagree)