To improve SSN results when a violation occurs:
- Use I/O standards that have a lower SSN impact for the failing group. Changing to a lower drive strength, a parallel-terminated DCI I/O standard, or a lower class of driver can improve SSN, for example, changing the SSTL Class II to an SSTL Class I.
- Spread the failing pins across multiple banks. This reduces the number of aggressive outputs on the power system of one bank.
- Spread the failing groups across multiple synchronous phases.
- Add phase information.