What PC, Software, Internet, and Cabling Does a DIY Golf Simulator Need?
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There is no standard golf-simulator PC. The right computer depends on the launch monitor, the simulator software, and the resolution you want to run. Some practice apps work on phones or tablets; other simulator programs require a Windows gaming PC and a capable graphics card. Choose the launch monitor and software first, then buy the computer and plan the network, power, and cable runs around that combination.
Pick the software before you spec the PC
It is easy to shop for a gaming computer first because the specifications feel concrete. That is backwards for a simulator. Software support changes by launch monitor, and the hardware requirements can be very different from one program to another.
Pick the software you actually want to use first. Check its current supported launch monitors, operating system, graphics requirements, license or subscription terms, and internet requirements. Then compare those requirements with the launch monitor's own app and connection method. GSPro, for example, runs only on Windows 10 or 11, and its minimum hardware list includes an Ethernet port and/or Bluetooth, depending on the launch monitor. A software choice like that can rule out some launch monitors before the PC is even part of the decision.
1080p and 4K are different workloads
GSPro's own hardware guidance shows the gap: an RTX 3070 or 3060 Ti with 16 GB of memory for a great 1080p experience, and an RTX 3080 or better with 32 GB for 4K. If your projector is 1080p, paying for a much stronger graphics card solely for 4K output may do nothing for the image you see today.
If you expect to move to a 4K projector later, that is a reasonable reason to leave some headroom. Just make it a deliberate choice, not a reflex because the simulator is the expensive part of the room. Make sure the future display still works with the projector geometry you can actually fit in the room.
Draw the connections before you close walls or ceilings
Make a simple connection map. Where will the PC sit? How does the launch monitor connect? Where does video reach the projector? Do you need a touchscreen, a second monitor, speakers, or a wired network connection?
Measure the actual cable route around walls, ceilings, and equipment rather than the straight-line distance. Long video or USB runs may need a different cable type or powered solution, so check the limits for the equipment you are using before buying a long bundle of generic cables.
Use Wi-Fi where it works; wire the parts that benefit from it
A simulator does not need Ethernet everywhere just because the room has electronics. Plenty of hardware works well over Wi-Fi. Some sensors are wired by design, though. Uneekor connects its launch monitors to the PC with a CAT6 Ethernet cable that must plug directly into the PC's port, not a switch, router, or adapter.
If the room is open for renovation anyway, an accessible Ethernet run can be cheap insurance. Keep adapters, couplers, and power supplies where you can reach them. A connection hidden permanently above a finished ceiling is much less convenient the first time it fails.
Plan power, heat, and service access together
Projectors and gaming PCs give off heat, and both need airflow. Leave space around vents and do not bury the PC in a closed cabinet just to make the room look tidy.
Put outlets where the equipment will actually live so extension cords do not cross the hitting area or walkways. If the room needs new circuits, ceiling power, or in-wall wiring, follow local electrical requirements and use a qualified electrician where the work calls for one.
Recheck software requirements before you buy
Simulator programs add features, drop old operating systems, change supported launch monitors, and raise hardware recommendations, and launch-monitor makers publish their own PC specs. Uneekor's page recommends an NVIDIA RTX 4070 Ti or higher when its hardware runs third-party software at 4K.