Help ! Help !

May I know
1. why I can not use power strip3.0B to o/c
my Radeon Engine core Freq..(it showed n/a in Engine core ) but OK o/c in 記憶體..
2. why AGP show X2 current data trafer 而非 AGP X4 ..

Radeon 64DDR vivo card
P3-897 dual cpu.
msi 694D Pro
radeon driver: 5.13.01.3102