Currently the websdr software is running on a laptop with the Debian 9.9.0 operating system. It has a I7 processor with 4 cores. It has 4Gbyte of RAM and standard hard drives. The laptop is about 5 years old (march 2020). We have a mouse & keyboard & monitor attached to it for development purposes.
We have not yet any cooling measures (besides the standard laptop internal blower).
If the cabinet where we have all equipment gets to hot in the summer, we will install a simple blower for airflow to cool.