When discussing custom PC performance through benchmarks, AVX-512 has long been treated as "an instruction set that exists in silicon but can't be used." That's because Intel fused it off at the silicon level in 2021's Alder Lake, and it never returned in any of the subsequent generations—Raptor Lake, Meteor Lake, Arrow Lake, or Lunar Lake. But on July 7, 2026, a post from leaker Jay Kihn and a Linux kernel patch suggested that Intel's next-generation CPU, "Nova Lake," might implement AVX-512 on both its P-core "Coyote Cove" and E-core "Arctic Wolf." Five years after the seal was set, what has now surfaced is the most thorough revival plan yet—a unified implementation across both P-cores and E-cores.
The leak: AVX-512 on both Nova Lake's P-core and E-core
On July 7, 2026, the X account "Jay Kihn (@jaykihn0)" posted about Intel's next-generation client CPU, "Core Ultra Series 4" (codenamed Nova Lake). According to the post, AVX-512 (a 512-bit SIMD instruction set) would be implemented on both the P-core "Coyote Cove" and the E-core "Arctic Wolf." A Linux kernel patch released around the same time reportedly showed that both the P-core and E-core would natively support 512-bit ZMM registers and EVEX encoding via AVX10.2, and that a new CPUID flag, "avx512_avx10_2," had also been added—as reported by Tom's Hardware. ZMM registers can process twice the data width at once compared to AVX2's 256-bit-wide YMM registers, which can boost throughput in workloads like video encoding or AI inference that repeat the same operations at scale. The fact that this information emerged from two independent channels—a leaker's statement and a kernel patch—pointing in the same direction lends the observation some weight.
If implemented, this would mark the first official return of AVX-512 to client CPUs since the 11th-gen Core "Rocket Lake," released in 2021. However, this wouldn't be a simple revival. Rocket Lake had a uniform architecture consisting only of P-core-equivalent cores, whereas Nova Lake has a hybrid architecture mixing P-cores and E-cores—meaning this would be the first time both core types shared the same instruction set. Nova Lake is positioned as the successor to Arrow Lake on desktop and to Panther Lake (Core Ultra Series 3) on mobile, with a launch expected in late 2026; Intel's investor communications have suggested the end of 2026.
The record of Alder Lake's "disabling, hacking, and sealing"
The story of how AVX-512 disappeared from client PCs is less a simple spec change than an unusual saga. In the 12th-gen Core "Alder Lake," released in 2021, the AVX-512 circuitry actually existed in the P-core silicon itself, but the newly designed E-cores didn't support it. While Intel decided against official support, a loophole initially remained: disabling the E-cores via BIOS would let users enable AVX-512 on the P-cores, and some motherboard vendors and users took advantage of this.
Intel didn't let this loophole stand. After closing it off with a microcode update, AVX-512 was physically fused off in silicon on Alder Lake CPUs manufactured from early 2022 onward, making it permanently impossible to enable. Behind this lies a structural problem: the hybrid design assumes the OS scheduler can freely move threads between P-cores and E-cores, which is incompatible with an instruction set available on only some cores. If a thread using AVX-512 got moved to an E-core, it would be unable to execute and could crash—a contradiction Intel would face every time it considered reviving the feature. Raptor Lake, Meteor Lake, Arrow Lake, and Lunar Lake all skipped AVX-512 for this same reason: lack of E-core support.
Why the AVX10.2 spec demands P/E unification
This isn't the first time Nova Lake and AVX-512 have come up together. In November 2025, Intel's official Instruction Set Extensions and Future Features manual revealed that Nova Lake would support a new instruction set called "AVX10.2," a superset of AVX-512. This manual's specification states that any processor supporting AVX10.2 must have AVX-512 acceleration on both P-cores and E-cores—and this has been cited as the basis for the claim that advanced vector processing would be implemented on both Coyote Cove and Arctic Wolf. This marks the first time a specification requirement and an actual codename-level implementation have been connected.
If this unified implementation comes to pass, it would also matter for closing the gap with competitors. AMD introduced AVX-512 to client CPUs ahead of Intel with Zen 4 (released in 2022), but used a "double-pumped" approach that split 512-bit operations into two 256-bit passes. Zen 5 removed this constraint, switching to native execution that processes the full 512 bits at once and boosting performance. Given Nova Lake's expected late-2026 launch, Intel's full-fledged client AVX-512 support would arrive roughly four years after AMD's Zen 4. The practical benefit for developers would be the ability to safely run optimized code for video encoding, cryptography, and AI inference libraries without worrying about whether it lands on a P-core or E-core.
The source is a single leaker, and Intel remains silent
Looking only at the information so far, a revival might seem like a foregone conclusion, but the foundation is surprisingly thin. The primary source for this claim is a single post from the X account "Jay Kihn," whose real identity and affiliation remain unknown—Intel itself has not officially announced AVX-512 support on both P-cores and E-cores for Nova Lake. Tom's Hardware, in the same article, explicitly states: "this is, for now, just a Linux patch, and Intel has not yet officially announced native AVX-512 support for Nova Lake." While the kernel patch does provide independent technical evidence, the mere existence of a patch doesn't rule out future removal or spec changes.
Moreover, speculation about Nova Lake's AVX-512 support has flip-flopped multiple times in less than a year. In October 2025, GCC compiler patch information briefly fueled the opposite speculation—that Nova Lake wouldn't include AVX-512, AVX10, AMX, or APX at all. The following November, Intel's official manual confirmed AVX10.2 support, overturning that view. And now, in July 2026, detailed implementation specifics for the P-core and E-core individually have surfaced as a leak. In the span of nine months, the assessment has swung through three stages: "none at all," "supported per spec," and "implemented per core."
Additionally, despite the precedent of Rocket Lake being criticized for overheating under AVX-512 loads, neither this leak nor the kernel patch mentions any impact on power consumption or thermals. The same goes for potential differences across SKUs or verification data from actual hardware—it's still unclear whether entry-level and high-end models would get the same implementation, or whether it would be limited to higher-tier models. All that's currently known is a general direction toward building AVX-512 support into the core design; whether that translates directly into mass-produced products remains to be revealed in future official announcements.
What this means for Japan's DIY PC builders and emulation enthusiasts
The Intel Core Ultra series remains a major option in Japan's DIY PC market, sold through Akihabara shops and domestic BTO manufacturers, and Nova Lake-based products are expected to hit the Japanese market as early as late 2026 through 2027. AVX-512 is known to directly affect performance in demanding software like the PS3 emulator "RPCS3," where the more computational work a CPU handles, the more its presence or absence can affect frame rates. This would be a meaningful change for Japan's emulation enthusiast and gaming communities as well.
AVX-512 on Alder Lake vanished through an unusual three-stage process: disabling, BIOS hacking, and finally silicon-level sealing. What Nova Lake appears to be aiming for is something on a different level entirely—resolving the inherent contradiction of heterogeneous design at the architectural stage itself, by giving P-cores and E-cores the same instruction set, rather than simply bringing back a feature temporarily. When Nova Lake launches in late 2026, how AVX-512 support is spelled out per core type on the spec sheet will be the first piece of evidence for determining whether the five-year seal has truly been broken.