Yes. I upgraded the CPU to an i7-4790 and I upgraded the RAM to 16 GB. I also got some pcie sata cards and added a bunch of HDD's. The HDD's are mostly lower capacity ones I had laying around but it's cool. I installed Cachy OS on it and even got Star Trek: Deep Space Nine: The Fallen running on it. I don't have room for a dedicated GPU so modern games are out of the question. It was a fun project.