Certus-NX: What are the recommendation on power filtering for DDR3? (BYPASS CAPACITORS TO GROUND, VDD, OR BOTH)
All three methods of connecting DDR bypass capacitors can work well, to ground / to VDD / or to both.
The key is to minimize the inductance of bypass capacitor connections to improve performance, bypassing to the closest PCB reference plane (VDD or Ground) provides the lowest inductance pathway. Bypassing to both ground and VDD in the schematic is likely to give good performance regardless of PCB stack up arrangement of VDD & Ground planes.