Part number two has come in: the power supply unit. I went with a Corsair model (HX620W) rated for a continuous 620 Watts. Although there are lots of supplies available with larger rated capacities, this PSU has a the build to actually exceed the rated capacity by over 100 Watts if necessary. While researching PSUs I learned that using much less than the rated capacity is inefficient (usually even less efficient than toward the top of the rated range), so having a bunch of power “headroom” is going to cost you – up front and over time. It seems the sweet spot tends to be in the 40-70% range. While I’ll be pushing the top end of that range, at least I’m saving some money up front on the cost of the supply (which was $120).
The PSU is rated as a “80 Plus” energy efficient supply but in reviews it usually runs in the high 80s. It’s also reported to have exceptionally good stability and low noise in all of its different voltage lines. This model also features a 50 Amp three rail design, modular cabling, temperature dependent fan control, and excellent overload protection. It doesn’t quite have the bling of my last PSU, but it should be solid for years to come.
Tags: Comp hardware / mods
