What is the oldest PSU that you own that is in a computer and working?

[exdeath]

Enermax 465W running 6800 Ultra SLI, Athlon 64 FX55 @ 3 ghz, RAID-0 Raptors and an external water cooling unit, it's been running since... well how long since PCIe and SLI first came out with the A8N-SLI?

And it's been run hard every day and spent 2-3 years in WoW in a high end raid guild.