I'm gonna return to your original inquiry. All computers and laptops are assembled, and therefore can be taken apart. Generally, this voids the warranty, however, your computer sounds old enough where your warranty is gone already. The i3 processor which is pre-installed in your laptop acts as the graphics card. I think currently, they sell i7, maybe even i8 chips which are amazingly better. I'm running an i5 on my laptop and blockland works beautifully. Clearly though, a better chip would work better. I recommend you consider purchasing an i5 or greater processor for your laptop, open up your laptop, and replace the old one. I had an old Toshiba and did a similar fix, but I was fixing a detached piece on the motherboard. Your laptop is most likely a bunch of screws, a few pieces of tape, and a couple wire detachments away from your goal. If you need assistance with this job, there are a plethora of videos and tutorials specific to both what you're trying to do, and with your specific laptop. Good luck!