The Service Pack 8 Virtex-E version 1.60 Speed Files contain general changes for revised characterization data. Fixes are also contained for the following errors:
1. "Trce reports longer net delay for -8 Speed Grade than -7."
2. "V300E-6 PCI/64/66 core."
This problem is fixed in the latest 3.1i Service Pack, available at:
The first service pack containing the fix is 3.1i Service Pack 8.