What is the minimum processor speed for Windows 11?

The minimum processor speed for Windows 11 is 1 GHz. Microsoft specifies that the processor must run at 1 GHz or faster and have at least two cores on a compatible 64-bit processor or system on a chip.

Clock speed alone does not determine Windows 11 compatibility. The processor must also appear on Microsoft's approved CPU lists, which means many older 1 GHz processors still cannot officially run the operating system. This distinction is why a computer can meet the speed requirement but fail the compatibility check.

Windows 11 added stricter hardware requirements than earlier Windows releases. A compatible device also needs at least 4 GB of RAM, 64 GB of storage, UEFI firmware with Secure Boot capability, and TPM 2.0. It must support DirectX 12 with a WDDM 2.0 driver.

The two-core requirement is another common source of confusion. A single-core processor running at 1 GHz does not satisfy the complete processor requirement. Microsoft also says that the 1 GHz speed and core count are built into the processor's design rather than being upgradeable components.