Alright well I would go with a 2600k, from a microcenter if you have one nearby or anywhere if you don't.
This motherboard, also available here as an open box for cheaper.
The RAM I haven't seen anyone say that 8Gb is recommended yet for a dedicated rig running only native linux and folding. For a dual purpose rig like mine 8Gb is advised but unless somebody in the know tells us otherwise I would go with as fast of a 4Gb kit as you can. So IMO that means these, unless you want to spend twice as much to go from 2133Mhz to 2200Mhz and get a fan for them too which I would say is not worth it. The 2133Mhz seems to be a great value though.
I don't know what you have planned for cooling but something like a
is hard to beat especially if you slap some high speed fans on there. Slightly cheaper but still an excellent cooler would be a
, and the cheapest I would go would be a
with another fan added on there.
For a PSU I would ask tator tot in this thread
what he thinks the best wattage and specific model is for a dedicated folding 2600K in terms of efficiency that still fits your price range.
Running native linux you would not need to buy a copy of windows.
A cheap tiny HDD or a thumb stick flash drive to boot from and you should be good to go.
Anything I'm forgetting?Edited by juano - 10/13/11 at 11:24am