Ask HN: Spec of Facebook's First Server?

Regarding the launch of Facebook in February 2004, all I've been able to glean is that they were initially running the site on a rented server costing $85 per month. Digging around in The Internet Archive for hosting sites that year I estimate Facebook was probably running on a P4 with 256Mb of RAM running PHP4, MySQL and Apache. Anyone have anything more accurate?