ABSTRACT Sensory Processing Disorder (SPD) has long been framed as a qualitative over-responsivity or under-responsivity to environmental stimuli. This paper presents a complete thermodynamic reconstruction of isolated sensory overload, introducing the Architecture of Cache Saturation within the HEPOE framework. We isolate the information erasure variable (Werasure) as the primary site of global hardware failure. Based on Landauer's Principle, resetting neural buffers to discard irrelevant ambient data requires active thermodynamic work (kB T ln 2). In this architecture, global clearance mechanisms, specifically astrocytic clearing and GABAergic desensitization, are highly inefficient, drastically raising the thermal cost of data erasure. To avoid catastrophic localized Joule heating, the system leaves the sensory buffers un-cleared. This induces an immediate, global cache saturation where background noise is permanently retained, forcing the Predictive Solvency Equation S(t) into an acute state of environmental overload. Keywords: HEPOE Framework. Sensory Processing Disorder (SPD). Cache Saturation. Landauer's Principle. Thermodynamic Erasure. Predictive Solvency.