Stuttering - How Can This Be Minimized?

I've tried various settings in TS2015 and NVIDIA Control Panel, but I still get too much stuttering.
Here's my setup:
Dell Inspiron 660
Intel Core i3 3240 Ivy Bridge, Socket 1155
8 GB DDR3 RAM
Velociraptor 10,000 RPM HDD
EVGA GTX 750TI 2 GB GDDR5 128 Bit interface. This is connected to a 21" Samsung Monitor via DVI-D Dual Link. I run the game at 1920 x 1080.
I can update to a Core i5, but it costs $200 despite being an old chip.
What does a person need to make this game work? It seems a Core i7 with a GTX 980 might do the trick, but maybe not.
Rob

Here's my setup:
Dell Inspiron 660
Intel Core i3 3240 Ivy Bridge, Socket 1155
8 GB DDR3 RAM
Velociraptor 10,000 RPM HDD
EVGA GTX 750TI 2 GB GDDR5 128 Bit interface. This is connected to a 21" Samsung Monitor via DVI-D Dual Link. I run the game at 1920 x 1080.
I can update to a Core i5, but it costs $200 despite being an old chip.
What does a person need to make this game work? It seems a Core i7 with a GTX 980 might do the trick, but maybe not.

Rob
