well, i can oc the NB frequency at max. about 2562.6MHz. in bios is the maximum, multiplier of x10. well, even so, i dont fells like any difference when ocing this. looks particularly the same. well at least, the game is kinda smoother, no lags but of course the fps still the same.
ok. as my final result OC,
Sempron 140 OC 3.46GHz. increase about 28.2% from stock
bus*multi: 257*13.5
voltage: 1.425V
NB frequency: x10 2567.2MHz
Max cpu temp: 54C
max mobo temp: 38-40C
Stability, 90-100%
Ram: OCed at 427.1MHz with timing of 5-5-5-12 T2 with auto volt
Previous oc to current oc percentage: about 0.4% increase
Benchmarks: not available