Alder Lake
Intel's 12th-gen hybrid architecture with performance and efficiency cores.
Chris Light · CC BY-SA 4.0
Alder Lake is Intel's codename for the 12th generation of Intel Core processors, launched on November 4, 2021. It is notable for being Intel's second hybrid architecture, combining Golden Cove performance cores and Gracemont efficient cores in a design similar to ARM big.LITTLE, and for being fabricated on the Intel 7 process (formerly Intel 10 nm Enhanced SuperFin).
Quick Facts
- Produced-Start
- 2021-11-04
- Produced-End
- 2025-04-25 (mobile)
- Soldby
- Intel
- Code
- 80715
- Clock
- 800 MHz to 5.3 GHz, P-cores · 700 MHz to 4.0 GHz, E-cores
- Microarch
- Golden Cove (P-cores) · Gracemont (E-cores)
- Arch
- x86
- Instructions
- x86-64
- Extensions
- AES-NI, CLMUL, RDRAND, SHA, TXT, MMX, SSE, SSE2, SSE3, SSSE3, SSE4.1, SSE4.2, AVX, AVX2, FMA3, AVX-VNNI, VT-x, VT-d
- Cores
- Up to 8 P-cores
Facts from the source article.
Lore & Background
Intel officially announced 12th Gen Intel Core CPUs on October 27, 2021, with mobile CPUs and non-K series desktop CPUs following on January 4, 2022. The Alder Lake-P and -U series were announced on February 23, 2022, and the Alder Lake-HX series on May 10, 2022. The hybrid architecture was announced in November 2021, marking Intel's second such design after the mobile-only Lakefield from June 2020. Desktop Alder Lake processors were on the market by January 2022, while mobile processors were expected early that year. First laptop tests were performed later that month, with PCMag positively reviewing the Core i9-12900HK. In April 2022, press reported hints of Alder Lake-X, and Intel officially announced the HX processor series on May 10, 2022, including Core i5, Core i7, and Core i9 models, with the Core i9-12950HX as the flagship and Intel's first 16-core chip for laptops.
The Golden Cove performance cores feature a 6-wide instruction decoder, 12 execution ports, 512 reorder-buffer entries, and an ~18% IPC uplift. The Gracemont efficiency cores are aggregated into 4-core clusters with a shared 2 MB L2 cache, 256 reorder-buffer entries, and Skylake-like IPC. Intel Thread Director assists the OS thread scheduler with load distribution. Alder Lake supports DDR5, DDR4, LPDDR5, and LPDDR4X memory, up to 256 GB, and features up to 20 PCIe lanes from the CPU (16 PCIe 5.0, 4 PCIe 4.0). The GPU is Intel Xe-LP with up to 96 EUs on mobile and 32 on desktop, supporting hardware decoding for AV1.
Early versions of Alder Lake CPUs had CPUID incoherence between P-cores and E-cores, causing issues with DRM systems. This was fixed in a microcode update, with P and E cores now returning the same CPUID when both are enabled. AVX-512 is present in P-cores but disabled by default; on early revisions it could be enabled by disabling E-cores, but Intel physically fused off AVX-512 on later revisions. The CPU family no longer features Intel SGX, which is required for playing UltraHD Blu-ray discs.
Reader's Guide
Alder Lake represents a significant architectural shift for Intel, introducing a hybrid x86 design that balances high-performance and energy-efficient cores. Its use of the Intel 7 process delivered a 10–15% performance boost over the previous 10SF process used in Tiger Lake. The inclusion of Intel Thread Director, requiring OS support, aimed to improve scheduling on heterogeneous cores, with Windows 11 and Linux kernel 5.18 providing support. The CPUID incoherence issue highlighted challenges in adapting software to hybrid architectures, but was resolved via microcode. Alder Lake's support for both DDR4 and DDR5 memory, along with PCIe 5.0, positioned it as a transitional platform. The discontinuation of Intel SGX affected UltraHD Blu-ray playback. The HX series brought desktop-class core counts to laptops, with the Core i9-12950HX being Intel's first 16-core mobile processor. Overall, Alder Lake set the foundation for Intel's subsequent hybrid designs and influenced operating system scheduler development.
Did You Know?
- Alder Lake was Intel's second hybrid architecture after the mobile-only Lakefield.
- The Core i9-12950HX was Intel's first 16-core chip designed for laptops.
- AVX-512 is present in P-cores but disabled by default; early revisions allowed enabling it by disabling E-cores.
- The CPU family no longer features Intel SGX, required for UltraHD Blu-ray disc playback.
Gallery
Frequently Asked Questions
Who is Alder Lake?
Alder Lake is the codename Intel uses for its 12th-generation Core processor family, officially unveiled on November 4, 2021. Think of it as the character who finally brought a two-type-core design to the x86 stage.
What are Alder Lake's powers and role?
Its signature ability is a hybrid layout that pairs Golden Cove performance cores with Gracemont efficiency cores, echoing the big.LITTLE philosophy ARM popularized. On desktop, a single chip can field up to eight P-cores alongside eight E-cores, letting it juggle heavy workloads and background tasks in one package.
Why is Alder Lake important to the Intel vs. AMD saga?
It was the first time in over a decade Intel overhauled its core microarchitecture on such a broad scale, shifting from a single-core-type design to a dual-type one. That pivot let Intel reclaim multi-threaded workloads it had been losing to AMD's Zen 3 parts and reset the competitive narrative heading into 2022.
What is Alder Lake built from?
Every Alder Lake die is fabricated on Intel 7, which is the enhanced, higher-yield revision of Intel's 10 nm SuperFin process. It sits one node ahead of the 10 nm parts that powered 11th-gen Rocket Lake, giving the hybrid design the headroom it needed to fit both core families on a single package.
More in Intel and AMD Microprocessors, Part 2 1-24
Spotted an error? Know more?
Reader corrections go straight into our review queue. Suggest an edit · How this site is sourced