Operating instructions

4.6 CPU Configuration
If your system came with one 1 GHz Alpha processor installed, you can
upgrade by installing a second Alpha processor.
Processor Upgrade Guidelines
In a single processor configuration, the CPU must be installed in the CPU slot
0 socket.
A single processor configuration does not require termination in the empty
socket.
Dual processors must be the same speed and same cache size.
Configuring and Installing Components 4-19