Dell Latitude E6420 1. What is the maximum RAM that can be supported? 8GB x 2 = 16GB. It is indeed 16GB 2. It is using DDR3 normal RAM or DDR3 low voltage (LV) RAM? Work for DDR3 low voltage. DDR3 normal not tested 3. Do you have a datasheet link for this model? Dell Inspiron 15 5559 1. What is the maximum RAM that can be supported? 8GB x 2 = 16GB It is indeed 16GB 2. It is using DDR3 normal RAM or DDR3 low voltage (LV) RAM? Work for DDR3 low voltage. DDR3 normal not tested 3. Can upgrade the 2.5" SATA HDD to 2.5" SATA SSD? Maximum Storage Capacity that 2.5" SATA SSD Supported? Tried SSD Micron Crucial BX500 1000GB 4. Do you have a datasheet link for this model? Dell Latitude 3490 1. What is the maximum RAM that can be supported? 16GB x 2 = 32GB 2. It is using DDR4 normal RAM or DDR4 low voltage (LV) RAM? 3. Maximum size supported by SSD M.2? 4. Do you have a datasheet link for this model? How do you download all the drivers automatically? Eg. Lenovo > Lenovo Vantage HP > HP Support Assistant