PCIe GFX - Necessary - No, not at all necessary for a DAW.
Only exceptions to that are:
- You want to run a multi monitor setup with more monitors than your integrated gfx will handle
- You want to run a high DPI monitor setup with higher resolution than you integrated gfx will handle
- Your doing video and want to off load the decoding to the gfx card or work with video editor software (in which case the integrated gfx will work but only up to a point)
- Your a gamer
For what its worth I’ve used both PCI gfx and integrated gfx successfully to run 6 monitors on my 3rd Gen i7 (same as yours) integrated graphics (2 monitors) and an NVIDIA GFX card ( 4 monitors currently a 970 but prior versions also). From the DAW perspective there is no difference in performance between them. However my 3rd Gen i7 doesn’t really go so well with my hidpi monitor (drives 2 full HDs just fine).
Your signature doesn’t list a graphics card, presumably then you have this working just fine now. Are you experiencing a problem of just curious?