Lenovo Yoga 9i 2-in-1 Gen 9 is running very slowly

A Yoga 9i 2-in-1 Gen 9 that feels slow has plenty of hardware, a Core Ultra 7 155H with 16 GB of memory, so slowness is almost always a mode, a busy background task or heat. The Intelligent Cooling mode set with Fn+Q changes how hard the chip may run, and the Eco mode that owners use to keep the laptop quiet holds clocks back, so a laptop left in Eco will feel slow in demanding apps. On battery, Windows and the laptop limit performance, and the power mode in Settings, System, Power and battery should be Balanced or Best performance when you need speed. A hot chip slows itself, so clean the vents and use a hard surface.

Windows updates, indexing and antivirus scans cause temporary slowness, and a full SSD makes everything lag. Install Lenovo's BIOS and drivers; the 2.8K OLED and 120 Hz display also reward the latest graphics driver. The 2.8K OLED at 120 Hz asks a lot of the integrated graphics, so a laptop that feels slow at scrolling may improve when the display is set to 60 Hz or to a lower scaling. Watch the memory too: with 16 GB, a browser with many tabs and a video call can push Windows into using the drive. Intel's Core Ultra chips include a neural processor and efficient cores that Windows schedules automatically, so an old Windows build can schedule badly, and installing the latest Windows update often smooths performance on this generation.