Apple Gains Early Access to Intel's Z68 Chipset for New iMacs

095114 intel z68

As noted by tonymacx86 (via 9 to 5 Mac), iFixit's teardown of the new iMac released earlier this week reveals that the machine utilizes Intel's BD82Z68 platform controller. The inclusion is notable in part because the Z68 chipset is reportedly not set for public introduction until next week.

Apple use of the Z68 chipset marks yet another exclusive for the company, which has occasionally been granted early access to forthcoming chip components ahead of public unveilings and competitors' offerings.

The Z68 chipset is also notable because it supports SSD caching, a system that marries conventional hard drives to small solid-state drives (SSDs) to provide a seamless user experience with increased performance as the most frequently-accessed files are placed on the speedy SSD.

Apple of course offers SSD options in its iMacs, either as a replacement for or in addition to the traditional hard drive included as standard. The iMac's SSD, however, is a full 256 GB drive rather than the much smaller-capacity drives envisioned for SSD caching. And while Apple doesn't seem to be supporting true SSD caching in the new iMacs, the company achieves a similar but less seamless effect by installing the operating system and applications on the SSD while leaving the traditional hard drive for media on systems configured with both types of drives.

Intel is reportedly preparing to launch its own "Larsen Creek" line of SSDs with capacities around 20 GB and specifically designed to support seamless SSD caching when paired with a traditional hard drive and a compatible chipset such as the Z68. It is unclear if Apple will be looking to incorporate such systems in future hardware, but the company is clearly interested in pursing SSD technology for its performance benefits.

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

Popular Stories

Apple Watch Ultra Night Mode Screen

Apple Watch Ultra 3 Launching Later This Year With Two Key Upgrades

Wednesday July 2, 2025 1:13 pm PDT by
The long wait for an Apple Watch Ultra 3 appears to be nearly over, and it is rumored to feature both satellite connectivity and 5G support. Apple Watch Ultra's existing Night Mode In his latest Power On newsletter, Bloomberg's Mark Gurman said that the Apple Watch Ultra 3 is on track to launch this year with "significant" new features, including satellite connectivity, which would let you...
iPhone 17 Pro in Hand Feature Lowgo

iPhone 17 Pro Coming Soon With These 14 New Features

Friday July 4, 2025 1:05 pm PDT by
Apple's next-generation iPhone 17 Pro and iPhone 17 Pro Max are just over two months away, and there are plenty of rumors about the devices. Below, we recap key changes rumored for the iPhone 17 Pro models. Latest Rumors These rumors surfaced in June and July:Apple logo repositioned: Apple's logo may have a lower position on the back of the iPhone 17 Pro models, compared to previous...
iPhone 17 Pro in Hand Feature Lowgo

iPhone 17 Pro Max Battery Capacity Leaked

Thursday July 3, 2025 5:40 am PDT by
The iPhone 17 Pro Max will feature the biggest ever battery in an iPhone, according to the Weibo leaker known as "Instant Digital." In a new post, the leaker listed the battery capacities of the iPhone 11 Pro Max through to the iPhone 16 Pro Max, and added that the iPhone 17 Pro Max will feature a battery capacity of 5,000mAh: iPhone 11 Pro Max: 3,969mAh iPhone 12 Pro Max: 3,687mAh...
iPhone 17 Pro Lower Logo Magsafe

iPhone 17 Pro's New MagSafe Design Revealed in Leaked Photo

Wednesday July 2, 2025 8:37 am PDT by
The upcoming iPhone 17 Pro and iPhone 17 Pro Max are rumored to have a slightly different MagSafe magnet layout compared to existing iPhone models, and a leaked photo has offered a closer look at the supposed new design. The leaker Majin Bu today shared a photo of alleged MagSafe magnet arrays for third-party iPhone 17 Pro cases. On existing iPhone models with MagSafe, the magnets form a...
airpods pro 2

AirPods Pro 3 to Help Maintain Apple's Place in Earbud Market Amid Increasing Low-Cost Competition

Thursday July 3, 2025 7:25 am PDT by
Apple's position as the dominant force in the global true wireless stereo (TWS) earbud market is expected to continue through 2025, according to Counterpoint Research. The forecast outlines a 3% year-over-year increase in global TWS unit shipments for 2025, signaling a transition from rapid growth to a more mature phase for the category. While Apple is set to remain the leading brand by...
Wi Fi WiFi General Feature

iOS 26 Adds a Useful New Wi-Fi Feature to Your iPhone

Wednesday July 2, 2025 6:36 am PDT by
iOS 26 and iPadOS 26 add a smaller yet useful Wi-Fi feature to iPhones and iPads. As spotted by Creative Strategies analyst Max Weinbach, sign-in details for captive Wi-Fi networks are now synced across iPhones and iPads running iOS 26 and iPadOS 26. For example, while Weinbach was staying at a Hilton hotel, his iPhone prompted him to fill in Wi-Fi details from his iPad that was already...
iOS 18

Apple Releases Second iOS 18.6 Public Beta

Tuesday July 1, 2025 10:19 am PDT by
Apple today seeded the second betas of upcoming iOS 18.6 and iPadOS 18.6 updates to public beta testers, with the betas coming just a day after Apple provided the betas to developers. Apple has also released a second beta of macOS Sequoia 15.6. Testers who have signed up for beta updates through Apple's beta site can download iOS 18.6 and iPadOS 18.6 from the Settings app on a compatible...

Top Rated Comments

alvindarkness Avatar
185 months ago
The Z68 does something far more important than just SSD Caching. It lets you use QuickSync. Basically letting you use the onboard intel HD GPU to accelerate tasks such as encoding while still relying on your dedicated GPU for normal graphics tasks.

Some Z68 motherboard manufacturers have decided to ignore this entirely, such as Gigabyte who dont supply power to the VAXG pin of the CPU - which means the Intel HD GPU is never powered.

I'd love to know what Apple have done. Does their implementation of the chipset/cpu allow OpenCL access to the HD2000/HD3000 on the iMacs?
Score: 6 Votes (Like | Disagree)
BTGeekboy Avatar
185 months ago
More than just SSD Caching...

The Z68 chipset has more functionality than just SSD caching. Check out the writeup from Tom's Hardware: http://www.tomshardware.com/reviews/z68-express-lucidlogix-virtu-ssd-caching,2888.html

A few things I learned from the article:
1. SSD Caching is not the best; it's far faster to use the SSD on its own. It does add a small speed bump when it's "primed" but, when I first read about it, it seemed like a lot of work for little gain, which I could already do better with existing chipsets.

2. The other big benefit, and I think this is even bigger than the SSD angle, is it allows you to access the excellent video transcoding capabilities that are included in the video chip built into the processor while making use of the add-in discrete graphics card to run the display. If they can combine that with Grand Central, that's a whole lot more performance out of the same chip than with a P67.
Score: 3 Votes (Like | Disagree)
Al Coholic Avatar
185 months ago
The big news here to me is Apple's continued quick access to components from intel that are barely out of the mold. Bodes well for future updates on their entire computer line.

Is it just me or has Apple been more aggressive with this in the last 12 months or so?
Score: 2 Votes (Like | Disagree)
Lesser Evets Avatar
185 months ago
I'm still waiting for an inexpensive and functioning PCI-e SSD for my tower. The tech is oddly behind for such things, on Mac. I'd love to have a 128gb SSD starter in a PCI-e slot... yeah, I'm slightly off topic.
Score: 2 Votes (Like | Disagree)
wacomme Avatar
185 months ago
It lets you use a cheap hdd to get speeds similar to an expensive large ssd.

Does this imply that with the arrival of TB supported drives, a cheap HD can be paired with a small SSD for speeds on par with a large SSD? Does TB access the Z68 chipset, assuming TB can be used as a boot drive?
Score: 2 Votes (Like | Disagree)
Hellhammer Avatar
185 months ago
That's the thing. We don't know how Apple has the display implemented in the iMac. They've implemented seamless display support allowing the use of both the IGP and a discrete GPU in the MacBook Pros so they can certainly implement something similar to allow the IGP to be active for QuickSync. As for Virtu, Apple would have to implement something similar themselves due to the different windowing/graphics system from Windows. It'll be interesting to see whether they've done so, perhaps in Lion. Certainly the performance of QuickSync over OpenCL for video encoding makes it worthwhile. Particularly, because all subsequent Intel processor generations look to keep and expand QuickSync support so adding support now will have long-term benefits and its something they will probably have to do eventually anyways.

And I've read the latest version of Virtu virtualizes the IGP rather than virtualizing the discrete GPU as before. Perhaps that also means that the display can be connected to the discrete GPU.

Hopefully Apple has since QS is definitely awesome. However, this could have been achieved with H67 as well since it supports the IGP as well so the main point of using Z68 still seems to be the SRT.
Score: 1 Votes (Like | Disagree)