Whether adding a graphic card only improve performance?

May 8, 2018
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Hello, I have just built a pc, Intel i7-8700k | 8x2 Corsair Vengeance 2400 | Samsung 960 pcie nvme | MSI Z370 PC Pro | Corsair CX650m

I have a spare MSI GTX 750ti

I use the pc with Photoshop, After Effects and Corel draw and Premier Pro for VFX and detailed vector graphics.

Will installing the spare graphics card improve the PC's performance or it will create bottlenecks and hamper the performance?