Generally these are running 24/7. However, there are rare outages because of power failures or for a couple of minutes from operating system updates. Updates are done in batches and installed primarily at night, during off-peak hours.

For several months in 2005, Diglow Game Core ran random checks on its game servers for uptime rates. My server was consistently rated as running more than 99% of the time.

This server runs on a connection that is rated at 8,000kbps downstream and 768kbps upstream. However, when my ISP has extra bandwidth, my bandwidth may be boosted to 16,000kbps/1,500kbps (estimated).

Server Specifications
Processor: Intel Celeron E3300 2.50GHz
Memory: G.Skill 4GB DDR2 PC2 8500
Hard Drive(s): 2x Seagate Barracuda 1.5TB 7200RPM, 1x Seagate Barracuda 300GB 7200RPM
Network Interface Card: Realtek 10/100/1000
Operating System: Microsoft Windows Server 2008 R2 Standard

Web Services
Internet Information Services 7.5
PHP 5.2.12
SQL Server 2008 Express
ActivePerl 5.10.1.1006
hMailServer 5.0 Build 326 ( SMTP, POP3, IMAP)
FTP

Game Services
Counter-Strike 1.6