Also have the same problem with my new GTX 970 (core I5, 8 gb ram, ssd)
All Elite settings set to low, shadows disabled, extended mode, monitor disabled. CoreParkingManager45.exe is even set to 100%.
Still ~62 FPS in ressource extraction zone. Really disapointing.
I found that FPS is slowly reducing just after loading, I think it's related to NPC spawning. When I have 62 FPS, my card is at 50% and my cpu to 80%, 50%, 50%, 50% approximativly. I don't understand why. Tried a lot of things with no success.
What can I do next ? Buy a GTX 980 ? Doing SLI ? Damn this game will ruin me.
Do anybody get no judder in ressource extraction zone ?