Recently in my bid to make a new PC, I stumbled across a peltier cooling system. I did some extensive reading on it (including consulting a friend who has a degree in materials engineering) and was wondering exactly how safe it is. Here's a list of some sites that might help. http://www.dansdata.com/pelt.htm http://www.themodfathers.jolt.co.uk/?page=&action=show&id=6136 http://www.themodfathers.com/modfatha/articles/pelts.php Okay, I know I need enough wattage on that thing, so I'm going to get a 200W rated peltier, with another power supply (non pc type), catering only for it. Also, read the third link on how to prevent condensation. Now, with my pondering: will it definately work? I mean, when you put up such a setup (the extra power supply will set you back about 200 bux) you don't really want it to work out less well than a good HSF. Not to mention you'd probably want to run watercooling with that. Another problem I think we'll face is this: being below 0 degrees will create condensation, sure, but its not the only problem faced. The PC is not designed to work at those temperatures. Will there be another problem which has not been brought up yet? especially since its only a certain part of the m/b that is chilled below 0, not the whole m/b. Will bringing down the temperature to below 0 (which I'm sure a 200W peltier will do, with the correct power) allow you to overclock your CPU way over what is conventionally possible? Also, although it will be elss effective, will using a peltier to create a cool environment in the PC actually help alot in the general life and speed of the PC (specifically the HDD)? And I'd probably need to find a way to increase the effectiveness by monitoring the cold air flow from the peltier. Need some ideas for that. Other than those few problems, I think peltiers are the best posible cooling system now. The more I read up on it, the more I feel like spending the money to get it (and overclock like crazy). Especially since such a system will be reuseable. Will someone that has tinkered with one give their opinions? p.s. I'm going to tinker around with a peltier soon, although not for computer use (making a mini fridge for the car). I hope this tinkering will give me the needed experience to modify and put it into the comp.