pcie 1 is a sound card port. Most of the PCIE slots closest to the CPU are used to connect to the graphics card. This slot provides X16 bandwidth. The network card, the sound card are fine. The short PCIE interface on the motherboard can be used to connect the PCIE X1 sound card and network card, and does not occupy the bandwidth of the graphics card, the graphics card is still X16, and the short PCIE channel is the south bridge rather than the CPU directly controlled.