# PCIE Spread Spectrum **URL:** \ **Category:** NXP LX2160\ **Created:** [December 30, 2024, 8:07am UTC](https://community.solid-run.com/t/pcie-spread-spectrum/946 "2024-12-30T08:07:40Z")\ **Posts on this page:** 4\ **Page:** 1
**Author:** ![joema](https://avatars.discourse-cdn.com/v4/letter/j/a9adbd/32.png) [@joema](https://community.solid-run.com/u/joema)\ **Post date:** [December 30, 2024, 8:07am UTC](https://community.solid-run.com/t/pcie-spread-spectrum/946/1 "2024-12-30T08:07:40Z")
Hi, Is PCIE Spread Spectrum enabled by default? can we disable it? thank you ---
**Author:** ![jnettlet](https://dub1.discourse-cdn.com/flex005/user_avatar/community.solid-run.com/jnettlet/32/62_2.png) [@jnettlet](https://community.solid-run.com/u/jnettlet)\ **Post date:** [December 30, 2024, 11:30am UTC](https://community.solid-run.com/t/pcie-spread-spectrum/946/2 "2024-12-30T11:30:09Z")
Are you using u-boot and device-tree as your boot method, or UEFI and ACPI? ---
**Author:** ![joema](https://avatars.discourse-cdn.com/v4/letter/j/a9adbd/32.png) [@joema](https://community.solid-run.com/u/joema)\ **Post date:** [December 31, 2024, 2:24pm UTC](https://community.solid-run.com/t/pcie-spread-spectrum/946/3 "2024-12-31T14:24:02Z")
hi, yes, we’re using the standard u-boot and device tree - mostly just using the SolidRun software almost with no change ---
**Author:** ![jnettlet](https://dub1.discourse-cdn.com/flex005/user_avatar/community.solid-run.com/jnettlet/32/62_2.png) [@jnettlet](https://community.solid-run.com/u/jnettlet)\ **Post date:** [January 2, 2025, 11:12am UTC](https://community.solid-run.com/t/pcie-spread-spectrum/946/4 "2025-01-02T11:12:46Z")
The only reference to PCIe spread spectrum is for the reference clock. This is not enabled by default in the BSP, you can see the reference here, SSC\_SEL is 0 ![image](https://europe1.discourse-cdn.com/flex005/uploads/solid_run/original/1X/8c7c9ef0486751122253e93de4a66fff587a9317.jpeg)