Calling this fanless is one of those things that is technically correct but not really accurate. Instead of the HSF having a fan directly on it, you're simply r

Calling this fanless is one of those things that is technically correct but not really accurate. Instead of the HSF having a fan directly on it, you're simply relying on the case's cooling to dissipate heat. Fans usually allow you to put larger fans on and larger fans means more airflow and quieter operation. You can design the entire system to be passively cooled but this will limit the potential power. This might be fine. Having a high-end GPU means this is almost impossible. For anyone wanting such a system, you'll want to go with an AIO HSF and intake and outtake fans on the case.