Affordability and performance of training systems devices have become key factors in improving availability of training to a broader military community. An example of this is the Target Projection System (TPS) embedded within Boeing's Visual Integrated Display System (VIDS) - a product delivered to a number of military training programs such as the T-38 and the USAF Distributed Mission Training (DMT) F-15C and DMT F-16 programs. Driven by a dedicated image generator (IG), the TPS simultaneously projects multiple high-resolution images of aircraft onto VIDS screens. Until recently, only a desk-side workstation or a full-featured, high-performance IG has had the polygon and pixel-fill performance necessary to generate the TPS aircraft imagery. However, rapid advances in PC-based three-dimensional (3-D) graphics technology have finally offered such performance at a much lower cost. This paper describes Boeing's effort in transitioning PC-based IG technology into the VIDS product by quantitative measurements of PCIG performance using TPS-specific benchmarks. IG performance requirements and their embodiment in benchmark databases and test software are described. Available PC-based IG descriptions are provided followed by a comparison of the benchmark test results, as well as a discussion of issues with real-time image generation hardware and software integration. Finally, a recommendation of the TPS PC-based IG is presented based on the observed performance, as well as IG features and other 'non-performance' factors. Suggested PCIG applications conclude the paper.