I was a long time happy-ish Cubase 5 user and have had to upgrade to Cubase 8 Pro because my Steinberg AI, TP and QC controllers are not supported properly (or at all with the QC) in Cubase 5 and my new Komplete Kontrol keyboard needs a later version of Cubase to function fully. With Cubase 5 I was never able to max out my machine, running dozens and dozens of tracks with many instances of VST instruments like Kontakt, Atmosphere, The Grand, Edirol, Reaktor, 4-8 fx plugins on every track and a string of bus plugins. I never reached cpu overload with any project.
Now I’m trying to use Cubase 8 Pro 64bit and with just 3 VST instruments and a few compressors I’m at around 75% load when resting (according to the transport bar) and with overload lighting up red when playing back. It’s also so slow to respond, for example when copying and pasting a midi object Cubase freezes and it takes about 3 seconds to appear. Also, using my Komplete Kontrol keyboard has serious latency with USB or just MIDI through the audio interface when I hit a key to the point where it’s not possible to play comfortably.
I’m running on an Asus ROG VW55 laptop with:
Intel I7 2.4Ghz (with turbo mode up to 3.2Ghz or something)
Windows 7 64 Bit
Samsung 1TB 840 Evo SSD
Steinberg UR 22 audio interface
Cubase 8 Pro 64bit
With 3 instances of Komplete Kontrol running I am nearly maxed out with audio processing usage really high and cpu overload lights up red on the transport bar repeatedly. Cubase is slow, laggy, yet with windows performance monitor running it says only 25% cpu usage. The same project opens in Cubase 5 64bit and is fine, snappy with no problems, playing the keyboard has no noticeable latency and copy pasting is instant as it should be.