We typically use Crucial memory in our desktop computers. The kits we use right now are Crucial 4800MHz DDR5. This 32GB kit of memory is two 16GB sticks. We often get questions from our customers about upgrading the RAM at a future date. It would be very easy to upgrade the computer later on, just make sure that the same model of RAM is used, there is a sticker on the RAM sticks with the model number. It's always best to match the ram with an identical pair of sticks when upgrading. There are 4 RAM slots on the motherboards, so this system could be upgraded from two 16GB sticks to four 16GB sticks for a total of 64GB. We also offer a 64GB kit on the customization form that is two 32GB sticks, so with four of those sticks you could get up to 128GB of RAM.