Laptop video card compatibility

Hey guys this is really my first time posting on tom's hardware and I'm fairly new to the customizing seen but I wanted to try my hand at it so here it goes. The basics of what im trying to do is upgrade the video card on an old alienware m5550, a good gaming laptop back in its day. So I have already confirmed that the video card in question is user replaceable and that the one it has currently is a geforce go 7600 256mb and I want to put something a little more recent in this thing. So my basic question is what would my system be able to handel and what would you recommend I do. If you guys need any more specs on this thing let me know what you need and I'll bring it up thanks.

thank you that is very helpful