What is the A side, B side configuration of AGP cards and what Vddq version should one order?
The Component side of the AGP card is the B side, and the solder side of the card is the A side. If looking from the back of the system chassis, the B side is on the right and the A side is on the left. The AGP bus has 5V, 3.3V, 12V and Vddq on the bus. The Vddq is intended as the power to the AGP bus interface controller ICs. The Vddq could be either 3.3V or 1.5V, depending on the motherboard AGP expansion slot design. The AGP expansion slot connector is divided into two sections by a plastic divider called the “key”. If the key of the AGP expansion slot connector is located near the back of the chassis then the Vddq for that slot is 3.3V. If the key is located closer to the center of the motherboard, then the Vddq for that slot is 1.5V. Most of the earlier 1X and 2X AGP slot was designed to be Vddq=3.3V. In newer motherboards, the AGP slot is usually 4X, 8X, and the Vddq is 1.5V. Some motherboards may also use a universal AGP connector. The universal AGP connector, as specified in th
