Because the current high-power power supply is relatively expensive, using this line can switch the two power supplies with low power at the same time, thereby increasing the power of the power supply. When connecting 5 graphics cards to swipe coins at the same time, the power of the power supply is not enough, and the high-power power supply is out of stock and the price is quite expensive. The adapter card here comes in handy. Through this card, the two power supplies can be switched on and off at the same time. The graphics card power is allocated to the two power supplies to substitute high-power power supplies. Precautions:Be sure to recognize the direction when plugging in, and don't plug it in reverse or off-position to prevent the device from being burned. When plugging in, hold the socket of the device before plugging in to avoid inserting the socket pins with excessive force. Wiring:The main power supply is connected to 4PIN, and the 24P power cord of the auxiliary power supply is plugged into the adapter card, which can realize that the auxiliary power supply and the main power supply are turned on and off at the same time to protect the power supply and the life of the graphics card. Colour:green Material:PCB Size:3 x 6.9cm Package Contents: 2 * large 4Pin interface synchronization boards Only the above package content, other products are not included. Note: Light and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.