Interoperability is the key to successfully augmenting the features and capabilities of ATCA systems with Advanced Mezzanine Cards (AdvancedMCs) or PCI Mezzanine Cards (PMCs). However, interoperability can be difficult to achieve and even more difficult to evaluate, so GE Fanuc Embedded Systems and Intel Corporation set out to jointly build and test several AdvancedTCA systems. By documenting system performance, the goal was to offer definitive assurance of interoperability. The test platforms used PMC and AdvancedMC modules from GE Fanuc Embedded Systems, compute blades from Intel Corporation and industry standard benchmarking tools. This white paper details several test system setups and provides the results of our testing.