Perfect Clearance Achieved
The ASUS TUF Gaming RTX 4080 Super (339.0mm) easily clears the Phanteks Eclipse P400A RGB's 420.0mm maximum GPU length.
Detailed Compatibility Analysis
Will the ASUS TUF Gaming RTX 4080 Super fit inside a Phanteks Eclipse P400A RGB?
The Phanteks Eclipse P400A RGB is fully capable of housing the ASUS TUF Gaming RTX 4080 Super. Because the GPU measures 339.0mm, it easily sneaks under the case's official 420.0mm maximum limit.
Thermals and Spacing
You have a buffer of 81.0mm remaining. Because the ASUS TUF Gaming RTX 4080 Super doesn't push right up against the front of the Phanteks Eclipse P400A RGB, your intake fans can efficiently push cool air directly into the GPU's heatsink without choking.
Radiator Warning
If you are just using standard 25mm case fans in the Phanteks Eclipse P400A RGB, you will have plenty of room to route your PCIe power cables cleanly. However, a push/pull radiator configuration at the front might consume that remaining 81.0mm of space.
Frequently Asked Questions
Does the Phanteks Eclipse P400A RGB support vertical GPU mounting?
Many modern cases support vertical mounting via an optional PCIe riser cable. However, mounting a thick card like the ASUS TUF Gaming RTX 4080 Super vertically can push the fans dangerously close to the glass side panel, choking airflow. Always check the case manual for specific slot spacing.
What power supply (PSU) do I need for the ASUS TUF Gaming RTX 4080 Super?
You should refer to the official manufacturer recommended PSU wattage. When building in the Phanteks Eclipse P400A RGB, ensure your PSU is not longer than the case's basement shroud clearance, especially if you plan to keep the hard drive cage installed.
How do I calculate clearance if I add a front liquid cooler?
If you install an AIO liquid cooler in the front of the Phanteks Eclipse P400A RGB, you must subtract the thickness of the radiator (usually 27mm) and the fans (usually 25mm) from the total 420.0mm clearance.