I have taken some interest in Bitcoin mining and am considering making a modest investment in a gpu or two to get a little rig going. I have three questions for anyone who may be knowledgeable on such:
1) Is it more cost-effective to go with one high-end ATI card (say the 5850 series) or a couple lower end cards? I'm looking to stick to a tight budget but also want some decent speeds (the great struggle).
2) How much specialized cooling is required for higher end cards? I currently have an older NVIDEA 8800GTS card which already runs a tad hot.
3) Does anyone have some ballpark figures on their build(s) and Bitcoin income per day? I have heard the difficulty is about to rise with the price hike.