Choosing a desktop for industrial SCADA and edge-control work usually comes down to three trade-offs: physical footprint, serial-port connectivity, and how much RAM and storage your controller or HMI setup needs. A tiny fanless box can sit near machinery, while a refurbished small-form-factor desktop offers more room for a Windows workstation. These four desktop options are spread across a wide price range, so the right choice depends on where the PC lives and what it has to talk to.
Quick Take
If you need an industrial mini PC with serial-port access, the Qotom Q310p is the straightforward pick. If you want a compact Lenovo with 16GB RAM and dual-display support, the ThinkCentre M715q Tiny sits in the middle of the price range. If storage and memory matter most, the Dell desktop with 32GB RAM and 4TB storage covers that end of the spectrum. The Qotom Q305p is the low-profile option for edge-control installs.
Listed Prices at a Glance
| Product | Listed Price | Price Bar |
|---|---|---|
| Qotom Q305p Fanless Mini PC | USD 59.99 | |
| Qotom Q310p Mini PC (RS-232) | USD 59.88 | |
| Lenovo ThinkCentre M715q Tiny | USD 199.99 | |
| Dell Windows 11 Pro Desktop | USD 221.47 |
Decision Matrix
| Product | Best suited for | Keep in mind |
|---|---|---|
| Qotom Q305p Fanless Mini PC | Compact edge-control installs | Used condition; modest drive |
| Qotom Q310p | POS or SCADA front-end tasks | Minimal RAM and storage |
| Lenovo ThinkCentre M715q Tiny | Engineering or office desk with a tiny chassis | 1TB storage limit |
| Dell Windows 11 Pro Desktop | Windows workstation | Highest listed price |
Product Notes
Portable Desktop Mini PC Core Onboard Fanless Mini PC Qotom POS 4GB RAM 32GB SSD
This Qotom Q305p is listed at USD 59.99, and its fanless design is a practical match for edge-control cabinets where moving air is a concern. It offers 4GB RAM, a 32GB SSD, and support for up to 8GB RAM, so it can handle light SCADA-front-end work. The product is listed as Used, and its stated use categories include casual computing, engineering coding, and office. The main limitation is the 32GB SSD: you will want external storage if your HMI projects or data logs grow.
Dell Windows 11 Pro Desktop Computer PC Up To i7 8th Gen. 32GB RAM 4TB SSD/HDD
The Dell is the highest-priced unit in this comparison at USD 221.47, and it brings the biggest headline numbers: 32GB RAM and 4TB of SSD/HDD storage. It is listed as Excellent - Refurbished with Windows 11 Pro and a small form factor, with HDMI, USB 3.0, DisplayPort, and RJ-45 available. That combination is easy to place on or under a control-room desk. The drawback is that it is the most expensive option, and it is a small-form-factor desktop rather than a tiny fanless mini PC. If local storage and memory are your priority, this is the desktop to choose.
Lenovo ThinkCentre M715q Tiny AMD Ryzen 5 Pro 16GB RAM 1TB SSD Dual 24 " Win 11
Listed at USD 199.99, the Lenovo ThinkCentre M715q Tiny balances price and capability. It pairs an AMD Ryzen 5 Pro with 16GB RAM and a 1TB SSD, and the title points to dual 24-inch display support with Windows 11 Pro. It is listed as Excellent - Refurbished, with USB 2.0, USB 3.1, DisplayPort, RJ-45, and audio ports. That makes it a strong candidate for a control-room desk where two monitors are helpful. The main thing to keep in mind is the 1TB storage limit: large local data archives will fill up sooner if you keep them all on the machine.
Qotom Q310p 3205u 4GB 32GB SSD Mini PC COM Serial Port IPC POS Computer RS-232
At USD 59.88, the Qotom Q310p is the lowest-priced desktop in this comparison. It is a 4GB RAM/32GB SSD mini PC with a COM serial port and RS-232, which is a useful combination for talking to older industrial controllers, POS peripherals, or SCADA field devices. The condition is listed as Very Good - Refurbished, and the stated use categories include industrial, engineering coding, and office. The trade-off is clear: 4GB of RAM is light for multitasking, and 32GB of storage is better for a dedicated edge gateway than for a general-purpose control PC. If your task is narrow, like running one edge-control service or polling serial devices, this is the practical low-price option.
Final Recommendation by Use Case
- Lowest listed price: Qotom Q310p
- Compact mid-range desktop: Lenovo ThinkCentre M715q Tiny
- Highest listed price with the biggest storage number: Dell Windows 11 Pro desktop
- Fanless mini PC: Qotom Q305p
