Arm unveiled its upcoming flagship CPUs for 2024, including the Arm Cortex X4, Cortex A720, and Cortex A520. These chips, built on the Armv9.2 architecture, promise higher performance and improved power efficiency. Arm also introduced a new 'QARMA3 algorithm' for memory security and showcased a potential 14-core mega-chip design for high-performance laptops. Ars Technica reports: Arm claims the big Cortex X3 chip will have 15 percent higher performance than this year's X3 chip, and "40 percent better power efficiency." The company also promises a 20 percent efficiency boost for the A700 series and a 22 percent efficiency boost for the A500. The new chips are all built on the new 'Armv9.2' architecture, which adds a "new QARMA3 algorithm" for Arm's Pointer Authentication memory security feature. Pointer authentication assigns a cryptographic signature to memory pointers and is meant to shut down memory corruption vulnerabilities like buffer overflows by making it harder for unauthenticated programs to create valid memory pointers. This feature has been around for a while, but Arm's new algorithm reduces the CPU overhead of all this extra memory work to just 1 percent of the chip's power, which hopefully will get more manufacturers to enable it. Arm's SoC recommendations are usually a "1+3+4" design. That's one big X chip, three medium A700 chips, and four A500 chips. This year the company is floating a new layout, though, swapping out two small chips for two medium chips, which would put you at a "1+5+2" configuration. Arm's benchmarks -- which were run on Android 13 -- claim this will get you 27 percent more performance. That's assuming anything can cool and power that for a reasonable amount of time. Arm's blog post also mentions a 1+4+4 chip -- nine cores -- for a flagship smartphone. [...] Every year with these Arm flagship chip announcements, the company also includes a wild design for a giant mega-chip that usually never gets built. Last year the company's blueprint monster was a design with eight Cortex X3 chips and four A715 cores, which the company claimed would rival an Intel Core i7. The biggest X3-based chip on the market is the Qualcomm Snapdragon 8cx Gen 3, which landed in a few Windows laptops. That was only a four X3/four A715 chip, though. This year's mega chip is a 14-core monster with 10 Cortex X4 chips and four A720 chips, which Arm says is meant for "high-performance laptops." Arm calls the design the company's "most powerful cluster ever built," but will it ever actually be built' Will it ever be more than words on a page'Read more of this story at Slashdot.
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