Yes you can upgrade or add additional memory card into you're memory card slot. Make sure to read the manual of the motherboard for compatibility of the device you will purchase. Example: Memory Support
DDR3 1333/ 1066/ 800 SDRAM (total 16 GB Max)
DDR3 memory modules are not interchangeable with DDR2 and the DDR3 standard is not backwards compatible. You should always install DDR3 memory modules in the DDR3 DIMM slots. And also be sure to check you're operating system if you want i higher amount of memory go for 64 bit process Operating system....