Intel’s new "FRED" technology boosts performance on Panther Lake processors, but it must be manually enabled on Linux.

Key points

• What is FRED? Flexible Return and Event Delivery (FRED) is a new architectural feature in Intel’s latest "Panther Lake" chips that improves how the CPU handles system events and transitions.
• Performance gains: By replacing older, slower methods of managing CPU tasks, FRED reduces latency and improves efficiency, particularly for heavy data-processing and networking tasks.
• Hidden feature: Despite being built into the hardware and supported by the Linux kernel since 2024, FRED is currently disabled by default on Linux systems.
• Manual activation: Users can unlock these performance gains by manually enabling the feature via a kernel boot parameter (fred=on).
• Future outlook: While it is currently off by default, recent developments suggest that patches are being prepared to enable FRED automatically in future Linux updates.

This new technology offers a significant performance upgrade for modern Intel laptops, but users are currently missing out on these benefits because the feature is not yet active out of the box. Enabling it manually can provide a noticeable speed boost for demanding professional and technical workloads.