Hello everyone!

I've been thinking of building two rigs both of which will use 7990 for GPU mining.
I'm looking for advise on the following

* Linux/Windows?
- I am thinking of Linux since I am much more used with it and I wanted to run the OS from a thumb drive. Any thoughts? I also find it easier to administrate with just using SSH etc.

* MSI/Sapphire/Asus?
- Will it matter? What is better on win/linux?

* PSU? 1200W or will 1000W be enough?
- I'm thinking of 1000W, but unsure

* Alternating pools or just one pool, any tips on alternating pools such as multipool.us?
- Unsure if alternating pools are the way to go..

The rigs will be built without chassis and placed in a cold cellar. I dont think I will be using water cooling.

Thank you for all your help!

/O