Unlocking the Speed of Light: How Hardware-Accelerated BitLocker Saves Your FPS

Windows 11 PCs now feature device encryption by default when a system includes a TPM 2.0 module, a subset of Microsoft BitLocker that has traditionally carried a potential performance penalty. According to Microsoft’s latest blog post, hardware-accelerated BitLocker offloads heavy cryptographic workloads from the CPU to dedicated hardware engines within the storage controller, freeing CPU resources and delivering substantial performance improvements.

Under the traditional model, BitLocker relied heavily on software execution by the CPU, which could degrade storage performance, especially during tasks like video rendering or large code compilations. The core innovation is cryptographic offload, with encryption and decryption handled by hardware within the storage controller, yielding higher efficiency and near-native SSD read and write speeds.

Hardware-accelerated BitLocker also strengthens security through hardware-based key protection in an isolated environment and offers better power efficiency for mobile devices. It requires NVMe storage controllers that support cryptographic offload and next-generation SoCs, and is integrated into Windows 11 versions 24H2 and 25H2; major chip manufacturers are expected to begin shipping compliant hardware in early 2026.