When selecting computer equipment, the number and variety of ports are often considered key specifications. Many users tend to assume that more ports equate to greater expandability and a more advanced device. However, in practice, unused ports can indicate design redundancy and wasted cost, while the absence of a critical port may disrupt workflows. Understanding the actual purpose of common ports is the first step toward making a rational choice.
Core Ports: Data Transfer and Power

The USB interface is the most universal data connection standard, but different types vary significantly. The USB Type-A port offers the broadest compatibility and is suitable for common peripherals like keyboards, mice, and USB drives. The USB Type-C port is more versatile, supporting high-speed data transfer, video output, and power delivery (PD protocol). For roles requiring multiple peripherals (e.g., finance, design), ample USB ports are indeed necessary. However, for fixed-purpose devices (e.g., dedicated terminals), extra USB ports may serve little practical purpose.
Video output ports directly impact display capabilities. The HDMI port is widely used in commercial displays like conference screens and projectors. The DisplayPort holds an advantage in professional scenarios requiring high resolution, high refresh rates, or multi-monitor daisy-chaining. The choice should primarily depend on the display devices you need to connect and the desired visual performance.
Specialized Ports: Industry-Specific Needs
In certain professional fields, specific ports are crucial. For example, in industrial environments, an RJ45 Gigabit Ethernet port is standard for connecting to local area networks and industrial networks, while the COM (serial) port is still commonly used to connect traditional industrial equipment like PLCs and barcode scanners. In audio-video production, the specifications and placement of audio input/output ports and SD card readers significantly impact workflow efficiency.
Power and Expansion Ports

The power port not only supplies electricity but its design also affects installation convenience and safety. The traditional DC barrel jack is widely compatible, while the newer Type-C PD port can simplify cabling. Expansion slots like PCIe provide the possibility of adding functional cards (e.g., capture cards, independent network cards) in the future, but this is only valuable if there is a concrete expansion plan.
Our Configuration Philosophy: Scenario-Driven, Avoiding Redundancy
We understand that discussing the number of ports is meaningless without considering the usage scenario. When customizing all-in-one PC solutions for clients, we first gather detailed information: Which peripherals must be connected permanently? Are there future expansion plans? Does the installation environment require specific port placement?
Based on this information, we provide a precise port configuration. For instance:
For digital signage devices, we prioritize video output ports and may reduce unnecessary data ports.
For medical workstations, we ensure sufficient and conveniently located USB ports for various medical peripherals.
For industrial settings, we invariably retain or add necessary COM ports and specialized communication interfaces.
This customized approach ensures port practicality and overall device cost optimization. We help you avoid paying for ports you will never use, while ensuring every included port plays a key role in your business processes.
When selecting equipment, rather than simply counting ports, it's more effective to list all the devices you need to connect. This list is the true standard for judging whether a port configuration is rational. We are ready to help you compile this list and transform it into a truly tailored all-in-one PC.