here's my critique.
Economy Mining Rig
AMD Athlon II X2 250 @ 3.0GHz AM3 Processor
(wtf? get a semperon or something)2GB RAM
(overkill. use linuxcoin)1x ATI Radeon HD5770 GPU
(why would you even use that card for mining? even as an "economy rig". i would expect a 5830)650W Power Supply
(overkill. a good 450W would probably work)500GB SATA HD
(wow, can't you get something cheaper? like a usb flash drive with linuxcoin?)DVD-RW
(they should revoke your rig building license)it seems like you're building gaming computers, not mining rigs. read up on how to build one over here:
https://forum.bitcoin.org/index.php?topic=16076.0.
Yea, must cut the crap in hard times. Just want to add that I run 2x5770 on a 400W no problem. Slightly OC:ed to reach 200MHash/s but compensating with 300Mhz mem so I guess they draw around 100W. Mobo + CPU maximum 100W probably less, CPU underclocked and undervolted.
Leaves another 100W for safety and more OC.