This is a "Generous guy opinions"


1
any cpu

2
any motherboard , it really depends on how many VGa card you want to mine with

3
any hdd or ssd min 60GB

4
min of 4GB of ram 8GB better any brand , any type what is working with ur mobo

5
if you are asking question like this ones , probably better for you to get a completed ,full build
something like this : https://bitcointalk.org/index.php?topic=1679407.0
or just use ebay and search for eth mining rig..

6
psu it depends what kind of setup you want , how many gpu , using the cpu for mining or not ...ect

7
cooling... keep your gpu temp under 85 celsius ,it depends how fair you placing your cards from each other , it can be fine with 30-35 celsius amb temp , but if your cards can not "breath" you can fry them ..

there is one of my build : https://bitcointalk.org/index.php?topic=1614386.0

there is another build thread : https://bitcointalk.org/index.php?topic=1584973.0

and there is a lot more on this site