You can upgrade upto 16GB with 0MB non-removable base memory and 4 memory slots

Machine name: Dell Studio XPS 8000
CPU options:
- Intel Core i5 Processor
- Intel Core i7 Processor
Chipset: Intel P55 Chipset
HD Bus: Serial ATA (7200rpm)
Front Side Bus options:
Memory Speed options: PC3-10666 DDR3-1333 240pin SDRAM DIMM