Quick Take
A SCADA workstation or edge-control node has to fit its environment. Do you need fanless operation and serial ports for legacy PLC connections? Or do you want a ready-to-run Windows machine with plenty of RAM and storage? The four listed PCs handle these different priorities. The least expensive is a compact Qotom fanless mini PC at $59.99, while the most fully equipped is a Dell Windows 11 mini desktop at $282.00.
Price Comparison
| Product | Listed Price | Relative Price Bar | Key Point |
|---|---|---|---|
| Qotom Q305p Fanless Mini PC | USD 59.99 | Low-cost fanless gateway with 4GB RAM and 32GB SSD | |
| HP Business Class Desktop | USD 184.99 | Ready with Windows 11 Pro, 16GB RAM, SSD, DVD | |
| Dell Precision T7910 Tower | USD 212.98 | Xeon tower for custom builds | |
| Dell Windows 11 Mini Desktop | USD 282.00 | Compact micro with 32GB RAM and 1TB SSD |
Decision Matrix
| Product | Best For | Standout Feature | Watch Out |
|---|---|---|---|
| Qotom Q305p | Edge gateways, POS, firewall, lightweight control | Fanless design, COM ports, small footprint | No OS included, 4GB RAM may be limiting |
| HP Business Class | Out-of-box office/SCADA workstation | Windows 11 Pro preinstalled, DVD drive, WiFi | SFF case limits expansion |
| Dell Precision T7910 | Custom workstation builder | Xeon 6-core processor, tower chassis | No RAM/GPU/HDD/OS, you supply the rest |
| Dell Windows 11 Mini | Space-constrained control rooms | 32GB RAM, 1TB SSD, built-in WiFi | Used condition, highest listed price |
Product Notes
Qotom Q305p Fanless Mini PC (USD 59.99)
This small fanless box is built for embedded work. It has 4GB RAM, a 32GB SSD, USB 3.0, and six COM ports, making it a natural fit for serial-based PLC connections, edge data collection, and firewall or gateway tasks. It also supports Windows, pfSense, and Linux, so you can tailor it to your stack. The catch: no operating system is installed, so you'll need to load your own software. At $59.99, it's the least expensive way to get a dedicated, quiet control node, but its 8GB maximum RAM means you shouldn't expect heavy multitasking.
HP Business Class Desktop (USD 184.99)
If you want a desktop that's nearly ready to use, this HP small form factor machine ships with Windows 11 Pro, 16GB RAM, an SSD, DVD drive, WiFi, and Bluetooth. That combination makes it a practical choice for running SCADA software in a small panel or office, and the serial port is a bonus for legacy industrial connections. The small-form-factor case, though, offers limited room for expansion cards or additional internal storage. For $184.99, this is a balanced option when you prefer a preassembled Windows desktop.
Dell Precision T7910 Tower (USD 212.98)
This is a tower for someone who wants to spec the memory, storage, GPU, and OS themselves. The refurbished Precision T7910 includes an Intel Xeon E5-2620 v3 six-core processor, USB 2.0 and 3.0 ports, and a tower chassis with room for expansion. Just remember: it comes with no RAM, no GPU, no hard drive, and no operating system. That means the real cost is higher than the listed $212.98 once you add those components. It's a usable base if you have spare parts or a specific dedicated-GPU requirement for graphics-heavy HMI applications.
Dell Windows 11 Mini Desktop (USD 282.00)
Dell's micro/mini desktop is the most complete package at $282.00. It comes with Windows 11, 32GB RAM, a 1TB SSD, built-in WiFi, and a very compact micro form factor. The connectivity set includes DisplayPort, HDMI, VGA, Ethernet, and USB 3.0, plus adapters for HDMI and VGA. Because it's used, expect minor cosmetic wear from normal use, but the memory and storage capacities are the highest among the four, making it a strong choice for multitasking and storing large SCADA logs. If your control room is tight on space and you want a ready-to-run machine, this is the one to prioritize.
Final Recommendation
For a serial-heavy edge gateway, the Qotom Q305p at $59.99 is the least expensive way to get a fanless node with COM ports. For a ready-to-run machine with the most memory and storage, the Dell Windows 11 Mini Desktop at $282.00 has 32GB RAM, 1TB SSD, and built-in WiFi. If you already have RAM, storage, GPU, and an OS on hand, the Dell Precision T7910 at $212.98 is an expandable six-core tower. And the HP Business Class Desktop at $184.99 balances Windows 11 Pro, 16GB RAM, and serial connectivity for an office-style SCADA station.
