In advanced process nodes, physical verification teams face the challenge of balancing reliability with area efficiency. While voltage-aware design rule checking (VA-DRC) addresses this, traditional implementations often use conservative worst-case voltage assumptions, leading to unnecessary spacing, restricted routing and wasted silicon area. The SyncNets packaged check for Calibre PERC provides a strategic optimization by integrating timing-related design intent into physical verification. By identifying synchronously switching net pairs, SyncNets replaces generic delta-V assumptions with realistic, synchronized voltage differentials. This approach significantly recovers layout margin and enhances design density, accelerating time-to-market while maintaining reliability compliance.