Do all of you have any tip for using peltier to cool a board?

I'm at one step to start cooling my system with some peltiers, I saw one in a piramidal shape, (reaching -50c). Is it effective, will I use much energy or it'll heat too much in the other side? Is anyone using this kind of cooler? Thanks.
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More about tip peltier cool board
  1. It will use a shit load of electricity, better to go with a phase changing cooler instead if you like to freeze your CPU.
    Also note that you will have to insulate all around and on back of the CPU to avoid condensing water.
    Reply to Kasper Jorgensen
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