The First Step: Buying The Processor
We bought a boxed 3.6 GHz Pentium 4 Processor 560. We did not use the engineering samples since they might be different than the retail products.
Nowadays, the Pentium 4 560 is widely available. That has not always been the case, since it took Intel two months to bring commercial-production volumes to the market.
This is Intel's reference cooler, bundled with all Socket 775 Pentium 4 processors.