My computer is a brand new windows i5 4690 3.5 ghz, 16gb ram, 1tb ssd beast that should be able to run a full orchestras worth of samples.
My soundcard is an Edirol ua-25, not great but it does the job and it's worked fine in the past with cubase. (just so you know I was running it at 288 samples... not that it should matter with so few instruments and processing.
I installed all my plugins and kontakt and shortly loaded up one instance of kontakt into vracks in a new project. I got up just one instrument and wacked on full articulations and mics (something even my old computer would have done easily 20 times over) and all seemed well until I tried out the MIDI editor and then pretty much every note was making the processing meter in the top right spike and with multiple notes it would crackle.
Now I'm sure I'm doing something wrong or it has to do with the whole computer, although the rest of my computer is ridiculously fast which makes it confusing. I'll be installing cubase again soon to make sure that it isn't the same on that though I'd be surprised. I guess potentially it might be a kontakt problem but I'm really not sure.
Any ideas or suggestions guys?
Thanks

P.S sorry if any of that doesn't make sense, it's 3 oclock in the morning here. haha