I think everyone has seen a PCIe (PCI Express) slot, but have you ever seen a PCI slot?
PCI is a standard proposed by Intel in 1991 to define the local bus. You can understand the PCI slot as an expansion slot based on the expansion interface of the PCI local bus component. Its color is generally milky white, and the bit width is 32 bits or 64-bit, operating at 33MHz, with a maximum data transfer rate of 133MB/sec (32-bit) and 266MB/sec (64-bit).
At that time, PCI slots were often used to insert sound cards, network cards, built-in Modems, built-in ADSL Modems, USB 2.0 cards, IEEE1394 cards, IDE interface cards, RAID cards, TV cards, video capture cards, and a wide variety of other expansion cards.
Some netizens found that there is a Pro A620M-C-CSM business motherboard on the ASUS official website, based on the AM5 platform, compatible with AMD Ryzen 7000 series processors, and has a PCI slot.
In addition, it also has SMBUS connectors, COM debug headers, LPT headers, COM serial ports, etc., and of course DDR5, dual M.2 PCIe 4.0 slots, rear USB 3.2 Gen 2 Type-C and front USB 3.2 Common interfaces such as Gen 1.