32GB -4x8GB Memory Ram For Apple Mac Pro 4.1 2009 Quad & 8-Core all CPU speeds
INSIDE YOUR MAC PRO QUAD CORE. Quad Core Model: 2.66Ghz / 2.93Ghz / 3.33Ghz. Your Mac Pro has 4 slots and the maximum possible upgrade is 56GB (3x16GB + 1x8GB) or 64GB (4x16GB) depending on what CPU you have installed .