Sonnet eGFX Breakaway Box, First Take: A GPU upgrade path for your Mac


Apple’s World Wide Developer Conference was unusually bountiful this yr, providing an assortment of and software program updates, in addition to previews of forthcoming merchandise such because the HomePod sensible speaker and that iMac Pro. Somewhat neglected was the announcement that Metal 2 — Apple’s up to date graphics API, as a result of seem with macOS High Sierra (10.13) later this yr — would help the usage of exterior graphics playing cards by way of a Thunderbolt Three interface.

Macs are sometimes criticized for his or her poor upgradeability, so this announcement might shall be welcomed by the corporate’s skilled prospects. Sonnet Technologies is not the primary firm to offer an exterior GPU that may hook up with a Mac or PC by way of Thunderbolt Three — corporations corresponding to Akitio and Mantiz supply related improve choices. However, Sonnet does have a protracted historical past of manufacturing improve merchandise for the Mac, and its new eGFX Breakaway Box is getting used as a part of Apple’s developer package for macOS High Sierra, so we had been eager to discover the efficiency enhancements that shall be out there to skilled Mac customers within the very close to future.

Sonnet’s Thunderbolt Three-interfaced eGFX Breakaway Box comes with 350W or 550W energy provides, the latter offering additional energy to cost the hooked up laptop computer.

Images: Sonnet Technologies

Preliminary exams

Comprehensive benchmarking is not actually potential in the mean time, as the general public beta of High Sierra at present solely helps the AMD Radeon RX580 as an exterior GPU, and with various limitations, corresponding to the necessity to join the eGFX to a second show when utilizing a MacE book Pro (as we did throughout our exams).

Even, so the outcomes supply some welcome excellent news for Apple’s skilled customers. It is feasible to make use of nVidia graphics playing cards with the Breakaway Box, utilizing nVidia’s personal beta drivers, however that requires some additional hacking, so we caught with an formally supported Asus RoG Strix RX580 offered by AMD, which prices round £390 (inc. VAT; £325 ex. VAT, or $450).

We examined a Breakaway Box with a 350W energy provide, which prices £318 (inc. VAT; £265 ex. VAT, or $299), however there’s additionally a 550W mannequin out there for £348 (inc. VAT; £290 ex. VAT, or $349) that may present additional energy to cost a laptop computer by way of the Thunderbolt interface. It’s a reasonably simple black metallic enclosure, measuring a cumbersome 205mm excessive by 185mm broad by 340mm deep, however even then we needed to be fairly cautious squeezing the full-length Radeon card by the facet panel and into the only PCI-Express slot housed contained in the field.


We examined a Breakaway Box fitted with an Asus RoG Strix RX580 graphics card in its single PCIe slot.

Image: Sonnet Technologies


The beta model of macOS High Sierra at present requires an exterior monitor to be linked to the Breakaway Box.

Image: Cliff Joseph/ZDNet

Our 15-inch MacE book Pro acknowledged the exterior GPU mechanically though, as talked about, the High Sierra beta at present requires an exterior show to be linked to the Breakaway Box. This work-in progress association confused our regular Cinebench R15 check software program, which resolutely ignored the exterior GPU for some motive. However, different benchmark apps, corresponding to Geekbench four.1 and Unigine Heaven had been capable of swap between GPUs just by dragging the app’s open window from the MacE book’s built-in show to our exterior LG monitor.


Even with a beta OS and drivers, the RX580-equipped Breakaway Box delivered vital efficiency enhancements over the MacE book Pro’s inner Radeon Pro 560.

Image: Cliff Joseph/ZDNet

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Geekbench four.1 reported a rating of 23,640 utilizing Apple’s Metal API on the MacE book’s inner AMD Radeon Pro 560, whereas the RX580 within the Breakaway Box delivered a roughly 30 p.c efficiency enhance to 30,600. However, OpenGL efficiency in Unigine Heaven offered a extra substantial enhance. Using Heaven’s highest ‘Ultra’ high quality setting at 1920-by-1080 (full HD) decision, the MacE book Pro’s native GPU managed a mere 16fps, however nearly doubled this to 31fps when utilizing the Breakaway Box.

Sonnet claims to have achieved body charges round 55fps utilizing nVidia’s GeForce GTX 1060 playing cards, so skilled Mac customers can definitely stay up for vital efficiency enhancements as soon as High Sierra get its closing launch.

Of course, the Breakaway Box does add some £300 to the fundamental value of no matter graphics card you select, however utilizing an exterior enclosure has different benefits too. It can simply be shared by a number of customers in an workplace — who can then argue over whose deadline is most vital. The Breakaway Box is not restricted to only GPUs both, as you could possibly swap in alternate options, corresponding to high-end audio playing cards, which may very well be helpful for small studios needing to work with a variety of multimedia purposes.

Sonnet has additionally indicated that High Sierra will enable the Breakaway Box to work with older Macs that includes Thunderbolt 2, with solely a minor efficiency penalty. That will surely be an attractive and cost-effective choice for current Mac customers — though it’s, in fact, topic to affirmation with the ultimate launch of High Sierra.



Image: Sonnet Technologies

If nothing else, the arrival of macOS High Sierra shall be welcomed by Apple’s skilled customers if it lastly permits them to utilize graphics upgrades corresponding to Sonnet’s eGFX Breakaway Box. Even utilizing the beta OS and at present out there drivers, the Breakaway Box delivers vital efficiency enhancements for Apple’s present skilled Mac fashions. It’s not low-cost, nevertheless it’s nonetheless far cheaper than shopping for a brand-new Mac — which has been Apple’s solely improve path for the reason that firm discontinued its outdated Power Mac tower techniques method again in 2006.

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