Some questions from -not so professional with hardware- laptop gamer

Hi guys, I have a notebook from 2010. It is this one. https://www.sony.co.uk/support/en/content/cnt-specs/VPCF12S1E/list
This baby does well till last year. It started to restart itself etc. I went to sony service/care and it still does great while playing most of the games on hd resolution. (full hd makes it really slower)

So I have (I think) fine processor (4-core 8-thread 1.73-2.93 range GHz i7) and ram (1333 mhz 6gb ddr3) for medium range gaming. But my graphics card (which is directx 10.1 supported nvidia gt330m) feels older/slower.
I just saw I cannot play Watch Dogs in this system and even nomore unreal engine 4 games because it is only directx11 supported.

So guys what do you suggest, can I replace this graphics card on my machine? if i can, should I?
Or should I get e-GPU? I have express card slot.

 

That laptop doesn't have a MXM-capable GPU, so no, you can't replace just the GPU. You'll need a whole new computer to get something better, and if you do I'd suggest some sort of Clevo (Sager) laptop or Alienware with a MXM GPU in it (so you can replace the GPU later if wanted).