SSC Setting

1. AMD

Advanced CBS FCH Common Options Miscellaneous Options FCH Spread Spectrum enabled

2. Intel

2.1. 这项是CPU设0.5% SSC / Core mesh RMT的reference clock（可能是这个，文档上写的）

Miscellaneous Configuration ISCLK Configuration SSC1 Enabled

2.2. 这项是CPU PCIE设0.3% SSC

Miscellaneous Configuration ISCLK Configuration SSC2 Enabled

2.3. 外置时钟SSC

Platform Configuration clock SSC Support SSC off/-0.3%/-0.5%/Hardware