Intel’s Advanced Performance Extensions (APX) are officially supported on Windows 11 PCs. However, there are currently no consumer PCs capable of utilizing APX. Intel’s APX is set to debut with the “Nova Lake” processors in early 2027, but software development has been ongoing to ensure new features are ready before the processors reach retailers. In Windows 11 build 29695 for insiders, there is a toggle that allows you to enable APX for better performance. This indicates that Microsoft has prepared the APX optimizations across Windows, which will enhance everyday tasks and handle workloads with more processing power.
Intel APX is an extension to the x86-64 ISA that adds more registers and introduces new features to boost workloads across various use cases. Intel has designed APX to double the number of general-purpose registers in a CPU from 16 to 32, along with specific optimization paths to ensure compiled code is optimized to take advantage of the additional CPU capacity, resulting in performance improvements. Although this is a minor tweak, the data paths that follow are much more efficient. Intel reports around 10% fewer instructions in compiled code for Intel APX, even though the new instruction lengths are larger. This means the overall efficiency of executed tasks will consume fewer CPU cycles, freeing up resources for more tasks and boosting system performance.
APX will also complement Advanced Vector Extensions, with AVX10.2 being the target for “Nova Lake.” Since AVX10.2 requires both P-cores and E-cores to support AVX-512 acceleration, this suggests that “Coyote Cove” P-cores and “Arctic Wolf” E-cores for “Nova Lake” will be capable of advanced vector processing, significantly enhancing CPU capabilities. With “Nova Lake” expected to feature a 52-core design, having a large set of cores processing AVX-512 could potentially give Intel an advantage in the desktop CPU market.