I am trying to power 230x Laser diodes at 30mA each. Applying 5V to each would accomplish this. However, I've converted two PC Power Supplies to general purpose power supplies and neither of them were able to support the required current. They would drop from 5V to maybe 3.5V at around 1Amp. I've even ordered a power supply from eBay that was rated at 5V 40A. It had an adjustable voltage of -0.5V to +0.5V. At 5.5V, it would drop to 4.5V and only 1A trying to power the load. Is this an expected behavior even from good power supplies? Or am I getting ripped off constantly? Is there a better way to power this load?