Hello,
users who notice no improvement or even a drop in performance when upgrading the CPU/system, please get in touch with support, this is by no means normal.
Some recent, related discussions can be found here: Cubase 8.5/ASIO vs. Multicore CPU - Cubase - Steinberg Forums and here: Cubase 8.5 (32bit) on i7-6700k or i7-5820k ? - Cubase - Steinberg Forums
The issue at the first link was eventually solved by rolling back the BIOS to the previous revision, F21 instead of F22 - quite a rare occurrence, but perhaps useful to some. The second contains some info/links about multi-core operation.
Windows users could try to disable the usual BIOS CPU trimming options (Turbo-Boost, Enhanced Halt, all C-States, Speed-step - naming may vary, please check the mainboard manual), in the OS: set Power Options for High Performance, disable HD and USB sleep, install only the GPU driver, avoiding the control panel (where applicable), 3D controllers and such.
It is worth to check the RAM timing as well: please, make sure that you are running at Intel’s recommended specs for the chipset/CPU in use, if overclocking (not recommended), make sure it’s an even ratio of the FSB speed. Also make sure that the modules are running at their ‘native’ speed (there are a few 1600MHz modules that are detected as 1333MHz and will run at that speed - this can cause both crashing and bad performance, it actually happened to me on a general purpose rig I assembled). A good course of action is: reset to safe defaults, check the RAM timing, then disable the above CPU frequency (many mainboards allow to save your profile, you might want to do that before loading safe defaults).
When all fails, please get in touch with support.
On Mac it can be a little harder to trouble-shoot, I’d advice to get in touch with support straight away.
Different applications can have different performance, with one or the other working better on some systems and worse on others, it’s all down to understand why and take action as different software implementations and frameworks will yield different results. Not referring to Logic here, as it does not use neither ASIO nor VST, they’re not really directly comparable.