Rumor Mill: Apple Working on an M1 Max Duo SoC for Upcoming iMac Pro

As its name implies, the M1 Max Duo will reportedly be two M1 Max chips connected together for double everything the Max chip offers. This translates to a 20-core CPU, and 64-core GPU, along with the ability to boast up to 128GB of RAM. There’s also Mac Pro rumors suggesting an M1 Max Quadro, with a 4x design. This is huge upgrade from the original M1 chip, which has just eight CPU cores and seven GPU cores, along with a maximum of 16GB of memory. The sources of these rumors are twofold: Bloomberg journalist Mark Gurman, and Hector Martin, who is porting Linux to Apple silicon Macs.

Starting with Gurman, who is a noted Apple insider, he pointed out in a recent tweet that Apple is indeed working on taking the M1 Max die and simply multiplying it both 2x and 4x for upcoming desktop chips. In his tweet he writes, “…the new Mac Pro desktop is expected to come in at least two variations: 2X and 4X the number of CPU and GPU cores as the M1 Max. That’s up to 40 CPU cores and 128 GPU cores on the high-end.” This dovetails with info from Mr. Martin, who has been elbow-deep in the MacOS code and reports, “…the macOS drivers have plenty of multi-die references, and the IRQ controller in the M1 Pro/Max is very clearly engineered with a (currently unused) second half for a second die.” If that’s not enough information from you, he adds, “For the technically minded: it’s a second set of config/mask/software-gen/hw-state registers, and the hardware inputs are all idle but you can software-gen IRQs in that block just fine and they get delivered with a die-id of 1 in the top 8 bits of the event register.” If you’re more into the video thing, YouTuber MaxTech goes into significant detail about all of these rumors.

For those of us who are silicon aficionados, it’s been fascinating to watch Apple’s moves in this market, as the M1 chips have upended the notion of what we can expect from a mobile CPU by offering both blistering performance and incredible efficiency; a rare feat indeed. Which is why the prospect of Apple delivering a chip that doesn’t need to go into a mobile device is alluring, as they can theoretically unleash the hounds since they won’t need to worry about power consumption, within reason at least. The bad news, however, is the same tipsters who are offering these tantalizing leaks are also pointing to insane price tags for this much power, with one pointing out the top-end Mac Pro could cost around $50,000. This shouldn’t come as that big of a surprise though, as you can already spend that much money quite easily on the current Xeon-powered Mac Pro tower, even without the $400 wheels.

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