Low Performance on Cubase 7.5

Hi team,

I’m tired fighting with the performance issue since I upgraded to the latest available CPU in the selected price range.
I experience pops and clicks almost all the time when I add more than 1-2 midi tracks (VSTs) to Cubase 7.5.
First I thought it only causes issues with NI Kontakt instruments, but then realized it behaves the same way with other VSTs: arturia, spectrasonics, etc… I run some Latency tests, but they show no issues with hardware or drivers.

Is it a well-known problem or my PC is special?

Lapsa Loydi