1. Is it good to mine on 5870+5850? AMD site says they can be xfired.
2. On what mobo, cpu, memory, disk etc should i focus? Can it be just a random mobo which handle 2 GPU?
3. Can FPGA/GPU run 24/7 or do i have to do a breaks like 30mins every 24 hours or something?
4. How to minimalize power consumption? I pay ~0,18$ per kWh
Thank you for help
PS
I've read so many articles and topics about it so please dont paste links like
https://en.bitcoin.it/wiki/Mining_hardware_comparison 1. crossfire function is irrelevant. The mining software does not use them that way. It will see each card individually.
2. Nothing special. Just get a MoBo with two x16 slots - more if you want to use more GPU's later. CPU doesn't matter, and a GB of budget RAM should be fine. Hard drive really isn't even needed, it can be run from a flash drive.
3 24/7 shouldn't be a problem
4. Don't go nuts with a huge power 1200W supply (a good 430W will do), don't add a lot of unnecessary components, drives, etc. Just keep it simple. Don't even need a monitor, actually, just log-in to it remotely.