Every business day Facebook’s Pineville, Oregon data center receives 4 truck shipments, with 13 racks of new servers each truck. Each single rack holds 90 servers. Each server has 72GB of RAM and/or a dual 6-core processor. This happens all year to keep up with demand. (source: Maximum PC, Nov. 2011).
That’s 4,680 servers installed every business day. Wow.