Given the 7750 ref, this is on Mac OS I assume (?) In any case, my experience on OS Sierra & Windows 10 is that GPUs make bugger-all difference to music apps, they simply drive the VDU(s). There was some talk a few years ago about Logic X being developed to offload processing power to the GPU, but have seen no development around this for any DAW. If running a video file within a DAW for music-to-picture, the GPU may be a little helpful, depending …
Mac OS does not natively support Nvidia & so downloading drivers is necessary (and that changes for each and every OS or security update); similarly, Nvidia will not support the mac EFI unless you have a flashed version of the card. So, no boot screen or command keys without this. You’ll be needing to do some background on that re. various mac /Nvidia GPU threads, e.g.: https://forums.macrumors.com/forums/mac-pro.1/ Buying a flashed for mac card is easiest, but a little more expensive. Usually a few always on eBay, or from MacVid Cards, http://www.macvidcards.com
In other apps like NLEs, video plugins and for gaming, the applications variously & actively use GPU Cuda or OpenCL for processing, and in tandem with the number of CPU cores and Ram - those later aspects can also have a dramatic impact on overall performance (not just the GPU).
I have heard of ‘some’ issues with Cubase and Nvidia cards. e.g.:
https://forums.geforce.com/default/topic/818523/video-hangs-in-cubase/
However, my Titan X runs fine with Cubase Pro 9 both on Sierra & Win10. FYI, I use the card etc for NLEs - FCPX on Mac OS & DaVinci Resolve on Win. Hope that helps.
[MacPro 5,1 /48GB /12 core 3.33Ghz /Nividia Titan X 12 GB (Maxwell)/dual 4k VDUs]