Watch Dogs 2 Stuttering with GTX 1050 Ti 4GB (Add More Ram Fix Issue?)

[gthreadmmka]

i3 2100 3.1ghz
gtx 1050 ti 4gb oc
8gb ram
i run games at 1366x768 monitor

yes i want to change my old cpu to the newest cpu+motherboard, but for now, i want to play games with it

I feel Stuttering alot in games with GTX 660 ti minimum graphic card required like pubg and watch dogs 2

first, stuttering in pubg is solved by turning geforce experince off, even ram only hit 6GB usage

and it increases 4 fps in watch dogs 2
i run watch dogs 2 low graphic, 26 - 34 fps
increase the graphic to very high , it decreases 4 fps

but the main problem is, it is stuttering alot while running and driving, it drops to 11 fps
ram just hit 6GB usage, it doesnt reach 8GB

you will think it is cpu problem because it is low end hardware, yes it is
but with the same cpu and ram, i ran it with RX 550 4GB, i ran it smooth enough with the same fps average 26 - 34 fps, yes it was not 100% smooth but , it was playable

its fps didnt drop to 11 fps like with gtx 1050 ti 4gb oc

What does cause it?
Does add 4GB more ram to 12GB Ram solve this issue?

 

[Graeme9]

Here are the Watch Dogs 2 System Requirements (Minimum)

CPU: Intel Core i5 2400s @ 2.5 GHz, AMD FX 6120 @ 3.5 GHz or better
CPU SPEED: Info
RAM: 6 GB
OS: Windows 7 SP1, Windows 8.1, Windows 10 (64bit versions only)
VIDEO CARD: NVIDIA GeForce GTX 660 with 2 GB VRAM or AMD Radeon HD 7870, with 2 GB VRAM or better
PIXEL SHADER: 5.0
VERTEX SHADER: 5.0
SOUND CARD: DirectX compatible using the latest drivers
FREE DISK SPACE: 50 GB
DEDICATED VIDEO RAM: 2048 MB