Tested, and are in working condition:
-2 x i7-920 CPU
-4 x 2GB DDR3-1066 (PC3-8500) RAM Sticks
-6 x 2GB DDR3-1333 (PC3-10600) RAM Sticks
-1 x 2GB DDR3-1333 (PC3-10600) RAM Sticks
-1 x 1GB DDR3-1333 (PC3-10600) RAM Sticks
-1 x 4GB DDR3-1600 RAM Sticks Corsair Vengeance
-1 x 4GB DDR3-1600 RAM Sticks Patriot Viper
Untested:
-2 x 2GB DDR3-1333 (PC3-10600) Laptop RAM Sticks