FSP PPA5008106 Hydro Pro K 500W 80 Plus Bronze Non-Modular Black Desktop Power Supply

I've been purchasing a few of these units, as I've not been able to get decent units under 500 watts lately. 500 watts is overkill for most of our school computers as is, but I went with this model as it is solid, no frills and sturdy. As a bonus, the attached cable length is long enough to route the cables neatly in every case I've used them in so far without running short.

Performance wise the PSU runs dead silent and to date I've had no complaints from users about random shutdowns or other issues that could be power related. As always I do wish one could get modular PSU's in this price bracket so you can reduce cable clutter, but failing that this unit makes for a very good office/school PC PSU.