The problem of predicting the noise immunity of computer technology when exposed to macro sources of electromagnetic interference, when difficulties arise in making mock-ups and simulators of the electromagnetic field in real time, is considered. A technique and mathematical models are proposed for predicting noise immunity of computer equipment when exposed to macro sources of electromagnetic interference based on physical modeling. Benches, physical models have been developed and examples of implementation of the proposed method for predicting interference immunity of computer equipment under the influence of macro sources of electromagnetic interference based on physical modeling for solving practical problems are presented.