Expansion card having two switchable connectors

An expansion card, comprising:

• a PCIe connector comprising a group of first receiving terminals and a group of first transmitting terminals;
• a non-PCIe connector comprising a group of second receiving terminals and a group of second transmitting terminals;
• a signal switching module, comprising:
• a signal receiving unit comprising a group of first inputting terminals and a group of second inputting terminal;
• a signal transmitting unit comprising a group of first outputting terminals and a group of second outputting terminal;
• wherein the first receiving terminals and the second receiving terminals are connected to the first inputting terminals, the first transmitting terminals and the second transmitting terminals are connected to the first outputting terminals;
• a signal processing module connected to the second inputting terminals and the second outputting terminals;
• wherein when both of the signal receiving unit and the signal transmitting unit receive a low-level signal, the second receiving terminals and the second transmitting terminals are connected to the second inputting terminals and the second outputting terminals;
• when both of the signal receiving unit and the signal transmitting unit receive a high-level signal, the first receiving terminals and the first transmitting terminals are connected to the second inputting terminals and the second outputting terminals.