Tyan Computer GX21 - Manual (Page 27)

2.3 Installing Motherboard Components
Chapter 2: Setting Up 19
3. Place the CPU in the CPU socket, ensuring that pin 1 is
located as shown in the following illustration.
4. Press the CPU socket lever down in the direction shown
to secure the CPU.
5. Apply thermal grease to the top of the CPU and place the
CPU heatsink on the CPU.
Pin 1