A:Answer You need to look up the specific specifications for the model of Dell you have.
Most laptops in 2009 came with SATA drives. As long as your laptop uses a SATA drive interface, the PNY CS1100 should work.
That said, unless the computer has a SATA II/III interface, you will not be able to transfer data at the full rated speeds of the CS1100.
You might want to consider putting the money for the upgrade toward a newer computer instead of upgrading a 6 year old computer.
