What is PCI Express clock gating in BIOS?

Clock gating is a power-saving feature in semiconductor microelectronics that enables switching off circuits. Many electronic devices use clock gating to turn off buses, controllers, bridges and parts of processors, to reduce dynamic power consumption.

What is PCI Express in power management?

Active-state power management (ASPM) is a power management mechanism for PCI Express devices to garner power savings while otherwise in a fully active state. Predominantly, this is achieved through active-state link power management; i.e., the PCI Express serial link is powered down when there is no traffic across it.

Can I turn off PCI Express?

By entering your computer’s Basic Input/Output System — or BIOS — you can enable and disable individual system hardware components, such as the PCI-Express slot, to facilitate troubleshooting.

Should I turn link state power management off?

It depends on your need. If always use your computer plugged in, then there you should disable the feature to get the maximum latency. However, to save battery, you should not disable it. You can also find a middle ground, i.e; turn the feature off when you are plugged in and enable it when you are on battery.

How do you change PCI Express power?

Click on “Change Advanced Power Settings” Expand “PCI Express” > “Link State Power Management” and change that setting to “Off”. Restart windows, and try re-running the game with your FPS utility of choice. While not all results will be the same, I saw a 10FPS increase from what I was getting previously (45~53FPS).

What happens if I turn off PCI Express?

Link power management merely lets Windows lower PCIe lane speeds or even put lanes in standby to save some power. Leaving it to on shouldn’t cause any performance issues. Turning it off will cause your PC to consume a few extra watts at idle.