FAQ1013: Firmware settings regarding realtime optimization

WARNING:
You are changing firmware settings on your own risk.
Every system is different and changing a setting might work for one system but prevent another from starting or even cause physical damage.
Please ensure you know how to clear settings in case the system does not start any more.

It is a wise strategy is to note every change and modify only one setting at a time. Some will require a power cycle to make them effective.
Generally said it is always "power saving" versus "latency" so disabling power savings typically reduces latency.

List of settings known to influence latency behaviour:

Disable when available:

• Intel Turbo Boost Technology
• Enhanced Intel Speed Step (EIST)
• Intel Hyper-Threading Technology (HT)
• C-States
• Intel Speed Shift Technology (SST)
• PCI Express Link ASPM Control
• DMI Link ASPM Control
• Aggressive LPM Support
• Render Standby (RC6)
• GT PM Support
• PCI Clock Gating
• Throttling (Thermal, PCH, ...)

Enable when available:

• Legacy IO Low Latency

Set when available:

• 0 for offset of Thermal Control Circuit (TCC) activation temperature
• Fixed (high) for SA Speed Enhanced Speed Steps (SA-GV)

You know other firmware settings optimizing realtime behaviour? Let us know and we can add them here.