The ram that works is VERY VERY VERY VERY VERY VERY VERY VERY Specific.  You have 4 ram slots and max ram is 16 gigs.  I would NOT advise trying 8 GIG modules because they are quad rank and do not work. [IMAGE]quad rank ram never works its high density               Nor do ECC or Registered modules work. Low density = $expensive  High density = $cheap  doesn't work and cant be returned LOW DENSITY is REQUIRED. LOW Density. INTEL Compatible Crucial 8GB Kit (2 x 4GB) DDR3L-1600 UDIMMCT2K51264BD160BConfiguration ID:CT7338356 [URL]   [URL] Specs: DDR3 PC3-12800 • CL=11 • Unbuffered • NON-ECC • DDR3-1600 • 1.35V • 512Meg x 64 •         
Is has 2x4 (8gb) ram stock and am looking to upgrade it to 6 by adding an additional 2x4gb and don't want any problems. Will any DDR3 1333MHz 10600 Non ECC 1333 Low Density RAM be ok? Thanks!
XPS 8300, memory modules for upgrade