To me it seems my CPU is more than suited for these kind of tasks.

The thing is it doesn't seem to matter that much if I increase the buffer size, also when I monitor my CPU with task manager or the dedicated Ryzen software it barely goes above 30%, and this is with a browser, spotify, whatsapp etc running in the background. I have a MOTU Ultralite mk3 which is connected via FireWire, I don't have the Hybrid version so no USB option. I am running Live 9 64 bit on Windows 10 with a Ryand 8GB of RAM, samplerate is 44100 and buffer size all the way up to 1024. As soon as I switch the 4th on it shoots to somewhere between 90 and 130%, turn it off and it goes back down. When I disable the 4th instance everything is fine, and cpu sits around 40%. I realise the sampler engines are most CPU heavy. All four of them have 2 engines with the sampler running and 6 of those use granular. I have adjusted to highest buffer (512) and lowest (44k) sampling with no improvement. I also get stuck notes and UI freeze occasionally. Some factory presets hit 70 or more CPU usage and audio breaks up/crackles with maybe 5 or 6 note polyphony. I have four instances of Pigments running and the fourth one seems to take up 50% of the CPU load, Pigments is always heavy on my cpu but it looks like something different is the issue. I'm running stand alone Pigments 2, latest update on Win 10, 16G, 1T SSD, i5 7th gen, ASIO USB Scarlett.

Arturia pigments 2 cpu usage