R121991 :
I am currently building a gaming/web surfing computer that i would like to be decently fast and reliable. I will slowly buy the parts i've picked between paychecks until I have them all. I have a computer case and LCD monitor already. However I am still a bit "iffy" about the power supply. A good friend of mine says don't get one below 300W. I would LOVE to hear any and all second opinions. I'm just starting to learn about computers so please watch the "lingo".
About the time this was posted, I built a mini ATX format desktop computer, using the Zotac IONITX-B-U motherboard with a 2Gig stick of DDR2 RAM. It runs a single core atom processor but has a special dedicated bridge to the onboard nVidia graphics chip to allow it to handle demanding 3D graphics without high power consumption.
The machine has performed flawlessly for 3 years now and could run Half Life 2 at full graphics smoothly, bogging down only when there was a lot of audio effects in one cut scene.
Run through a Kill-a-watt meter, the system idles at 18 Watts and peaks at 24 Watts. I can run it with a DC-DC converter at 12 volts from a battery powered by a solar panel.
By contrast, a newer Zotac IONITX-T-U boasts runs an Atom D525 (1.8GHz dual core) processor and can support 8 gig of DDR3 RAM. The onboard chip has a dedicated half gig as well. It ships with a 90 watt power brick, but you could do DC-DC conversion the same way that I do.
In spite of the lower processor speed, I bet it will be able to handle Diablo III effortlessly.
If you want to go low power, you need to rethink the big board and peripheral card bus mentality and think system dedicated to graphics.