Printed circuit board method and apparatus

A card slot receiving a card provided with signal input/output pins to provide extended capability, and having data transmission pins, a power pin and a ground pin in correspondence to the signal input/output pins, and internally comprising:

• an electronic device to do impedance matching with the card, the electronic device having a first end connected to at least one of the data transmission pins and a second end connected to one of the power pin and the ground pin.

A hardware interface receiving a device providing operability to a computer, comprising:

• a slot providing an electrical and mechanical connection with the device;
• and
• a circuit element reducing an impedance loss between the hardware interface and other components of the computer.