I found out, that L5 has a great performance compared to SX 3.
A project in SX 3 with VSTi´s (3x Vanguard, Cronox 3, FM7, Reakor 5, Halion 3)
spikes up to 80-99 % when playing a chord-sound in Vanguard, crackles and pops appeared.
I loaded the same amount of VSTi´s in L5, played the same sound ...