Is it safe to replace the graphics card and cpu in an Alienware laptop?

One of my friends recently built a new computer and gave me his old Alienware m15x-R1 laptop. I wanted to replace the processor and graphics card. Would this be good to do?

It can be done if the laptop doesn't have the best possible processor and graphics solution for it's motherboard. What hardware specs does this laptop have?

Have you screwed up a laptop upgrade? I've done several upgrades to my laptops and some friend's laptops without any problems. I've upgraded RAM, CPUs, and hard drives. Graphics can sometimes be upgraded. High-end graphics is more likely to be upgrade-able since high end graphics is more likely to not be integrated into the motherboard or CPU.

Alienware laptops probably all have discrete graphics cards so upgrading is possible so long as the laptop doesn't already have it's best possible configuration.

Small improvements? It depends on the difference between the previous CPU/GPU and the new ones. Sure, going from a 6900m to a 6990m won't give a good difference, but going from 6700 to 6800 or 6800 to 6900 cards will be a greater difference.

Also, the better CPU/GPU don't need to be expensive, just go to ebay.

You can try Google to find out all supported CPUs, graphics cards, and RAM configurations. You can definitely get a better CPU and video card, but I don't know if a laptop that old would support the newest video cards. However, it can almost certainly support faster graphics than a Geforce 6800m.

Again, try Google to find out what it supports.