Final Cut won’t use dedicated graphics card.

As the title says, I’m a video editor so I use Final Cut for my workflow. The problem is I recently noticed in the iStats Menubar that the Hd630 is used when exporting with 7% memory usage and 59% processor usage. The GTX 970 that I have just stays at 17% memory usage and no processor activity whatsoever. Does this mean that all this time I used the internal graphics card like an idiot? P.S: Internal graphics is enabled from bios as I read somewhere awhile ago that it helps with export times. Pc is a bit old, MB Gigabyte z270, i5 7600k 4.6 GHz, Corsair 16gb 3200, and gtx 970 extreme edition. I’m running high sierra cuz well, it’s the last os version this damn card is supported.

P.S2: I went into bios, turned off the internal graphics. Now only the nvidia turns up with 5% memory and 15% processor usage, but the export takes forever. Like it’s been five minutes in and now is 1%. With the integrated graphics would be like 1% a minute on this project.