Something like a Celeron J1800/1900/1037U looks like it would be great on power consumption and some of the boards are even fanless. Single threaded performance of the J1900 is on par with your P4. Of course, for multithreaded apps, it's 3x faster. 10W vs 80W :D It kinds of seems like a better Atom.

Great idea guys. Thank you very much. It's insane how many options that there are these days. Something like a Celeron J1800/1900/1037U looks like it would be great on power consumption and some of the boards are even fanless. The Haswell stuff also looks interesting. I have a feeling that I'm going...

Thanks guys. All great helpful points. Freecycle is pretty interesting. I had no idea stuff like it existed. Lets say I go with something newish, what are among my cheapest, lowest wattage, quietest options? I'm most concerned with noise and power consumption. The only catch is I need a single PCI s...

Thank for the reply. I'm most concerned with the noise/power consumption. I didn't think about if the Intel GMA3100 video had newer codec acceleration. I'll have to read up on on the sandy bridge stuff and see if I can score something cheap.

Hi, I have a P4 3.06 Northwood desktop that is getting a bit slow. I'd like to replace it with parts that I can score cheap off Ebay. It doesn't have to be cutting edge. I'm looking for something that would be lower power consumption and also quiet. I already have a quiet 80+ PSU so I'm covered on t...