Built this PC to play mainly steam games. Runs Kerbal Space Program, Universe Sandbox, Portal, G-mod and more on full settings without any problems. I plan to add 4 more gigabytes of RAM, however this PC has yet to pass 75% memory usage even while running 2 games at once. The one issue I had with this build however was the fan that comes with the case is not 100% compatible with the motherboard fan ports. The fan has a 3 pin cable while the motherboard has 4 pins for each fan. The fan will work when plugged into the last three pins but you will not have any control over that fan's speed. The PC has yet to even come close to overheating even with this issue, but I still plan to purchase a new compatible fan in the future.