The led strips where powered by an old pc power supply that was standing in a corner of my desk. I had to place resistors on the 5V line to get the power supply stable because the 12V output was the only output in use. This was a waste of energy, so I bought a 150W 12V power supply to power my led strips and a few other appliances.
The power supply is mounted behind my equipment, therefore I got some more workspace.
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