You know Bitcoin mining has hit the mainstream when a computer manufacturer dedicates its design and manufacturing efforts to go after the market. This is exactly what happened at ASRock.
They have announced their dedicated Bitcoin mining platform the H61 Pro BTC motherboard.
This motherboard includes the ability to connect 6 video cards simultaneously for Bitcoin or Altcoin mining. As far as GPU mining is concerned, 6 cards is very difficult to achieve with existing hardware. Therefore, congratulations to ASRock as this is a very impressive piece of hardware to design and manufacture.
ASRock H61 Pro BTC