Obvious, visit a secret Bitcoin mining operation. If you think that Bitcoin mining is something you can do with a spare GPU, or even a rack of spare GPUs, then it's time to rethink.
The ASICMINER construction was started in August 2013 and its hash rate started to ramp up in October. The whole unit is installed on the roof of the company that makes the ASIC chips. The ASIC cards are fitted to racks inside a glass tank containing a fire retardant liquid normally used in extinguishers. The liquid is cooled and pumped around using Chinese hardware. Each tank has 92 blades with 200cc of liquid providing 4kw of cooling.
Currently the farm is not fully populated and some of the racks are empty. The construction of the cooling system looks more like a piece of sci-fi set or perhaps plumbing-based modern art: ASICMINER is estimated to have 1% of the Bitcoin mining market but what happens when hardware like this is fully working and perhaps expanded a few times over. It is thinkable that with hardware and software improvements a single entity could control mining and hence the block chain — not to mention making the SHA-256 hash completely useless."
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