The Professional Series Gold AX series PSUs have thermally controlled fans which will vary the fan speed depending on both the loading and temperature of the PSU. Check out the video below for a specific explanation:
The 24-pin ATX connector for the AX series PSUs have a split connector that plugs into the AX series PSU. The single 24-pin connector is the end that will connect directly to your motherboard. See below for a video explanation.
The HX1050 is the updated version of our popular HX1000 PSU. In addition to a slightly different look, we have moved to a single 12v rail design, and we have also been able to increase efficiency to 80 Plus Silver compliance to match our other HX series PSUs.
Efficiency has been improved from standard 80 Plus, to 80 Plus Bronze with the V2 versions. Also, the V2 PSUs are now ErP compliant. The only other main difference is that the product labeling and packaging have been revised.
In order to start up, the power supply requires two things. A load (a device connected to it requiring power) and a signal. The switch on the back of the PSU simply tells the power supply to go into standby mode and await a signal from the motherboard to actually turn on.
Disconnect everything from your PSU except for one single fan that should be connected directly to one of the Molex connectors. Then, get a small piece of wire, paper clip, or suitable object and short the green pin and a black pin on the 24-pin connector on the power supply. The voltage present is a very low signaling voltage so no worries of being shocked. Your PSUs fan should spin along with the fan you have connected to it. If this is the case, your PSU may not be receiving the power on signal from your motherboard and you should consider other causes of the problem you’re having.