Lanbench

Open LANBench on the second PC. Enter the IP address of the first PC.

is a specialized, lightweight utility designed to benchmark the speed of a local network (LAN) connection between two computers . It is highly regarded for its portability and minimal system impact, making it a staple for quick network diagnostics without the need for complex installations. Core Functionality LANBench

If you use homeplug adapters, LANBench can reveal the actual throughput over your electrical wiring, which often drops significantly over distance. Open LANBench on the second PC