look on your power supply, they usually list how many amps / per voltage line.
then look at how many amps that peltier pulls. and figure out whats left on your 12V line. If you have less than 7 or 8 amps left, you might need a larger power supply.
If you are close, hook it up, and test the voltage on the 12V line. If its too far from 12v, you need a new PS.
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