Nvidia GeForce GTX 570m performance questions

I’m having a bit of an issue here and I’m honestly not sure how much graphics RAM I actually have. My games aren't really running the way they should be, so I was wondering if maybe my card actually has 4 GB of RAM, even though it doesn't seem to be performing at full capacity during gameplay. Could someone please help me out?
This is what shows up in my card settings:
Total available Graphics Memory: 4095 mb
Dedicated Video Memory: 1536 mb
System Video Memory: 0 mb
Shared Video Memory: 2559 mb

Your GPU has 1.5GB of memory; everything else is just pulling from the laptop's RAM.

It’s possible that 1.5GB isn't enough, but honestly, I’d bet the bottleneck is either the card's raw power or the rest of the laptop's hardware. 1.5GB is technically more than what that specific card actually needs to run the settings it's capable of pushing.

I've got 16 GB of RAM and an i7 processor...

You didn't mention which games you're running or your exact processor specs, but if performance is tanking, it’s probably the GPU holding you back.

I just finished installing Far cry 2, but I'm having some issues because the frame rate seems really choppy and stuttery, even though I'm running an Intel Core i7 2670 QM CPU 2,20 GHz

It’s a pretty old game; it should run fine. Try reinstalling your graphics drivers—if you can, use DDU to wipe the old ones first (just Google it)

Alright, thanks