This ultrabook came with 4 GB of memory. Being a 64 bit OS, I decided to add more memory to prevent time wasted swapping out pages. I was expecting to remove the 4 GB memory to add the 8 GB. When I pulled off the back using a T5 driver, I found the memory slot empty, so all I had to do was plug in the new memory. Now the ultabook has 12 Gig of memory. I am still thinking about adding a SSD drive.