Phanteks Eclipse P400S Tempered Glass Case Review


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P400S Tempered Final Thoughts

The P400S Tempered makes a perfect computer case for a standard gaming system with its stealthy look, glass side panel, and RGB lighting effects. This is a good computer case for people who are looking into building their first computer. It also makes a good silence optimized computer thanks to sound dampening materials on both side panels, the top covers, and the front panel. Computer users looking to build a small and affordable system in an elegant enclosure should consider the P400S Tempered. 

Phanteks Eclipse P400S Conclusion

The P400S Tempered does well when it comes to performance. The front of the case supports three 120mm intake fans and the top supports up to two 140mm fans for improved airflow. The P400S Tempered is not the best computer case for water cooling because there is no support for a radiator with fans at the top of the case. The front does support a 280mm or a 360mm radiator, but installing a 360mm radiator does require the removal of the mid-plate bracket and the removal of the only two 3.5″ HDD drive caddies in the case. For a standard gaming system, the P400S Tempered allows adequate airflow to the internal components.

The case looks great with its simple, stealthy exterior look and the tempered glass side panel is large enough to show off the internal components. Having the LED lighting feature and an RGB LED strip is a nice touch giving the P400S Tempered some character. The exterior looks modern with its sleek design and glass side panel.

In terms of construction and build quality, the internal structure is pretty sturdy throughout and the side panel is heavier than normal due to the added sound dampening material. I am very happy to see captive thumbscrews on the side panel as this prevents any user from misplacing them. The tempered glass side panel is 3mm thick making it heavy and durable.

The P400S Tempered does well in terms of functionality. Personally, I would have liked to see support for CPU coolers over 160mm. This could have been an easy fix to future proof this case for computer users looking into adding water cooling hardware into their system sometime in the future. This would prevent them from having to purchase a whole new case.

As of February 2017, the Phanteks Eclipse P400S Tempered Glass Edition sells online for $89.99 (Amazon Newegg). For a standard build, you are getting an affordable case with modern features and design. If you do want to add more storage, extra mounting brackets can be purchased separately from the Phanteks website. Overall, the Eclipse P400S Tempered is a great case for first time builders or for computer users who want a smaller ATX case with a simple look.

Pros: Benchmark Reviews Silver Tachometer Award Logo (Small)

+ Tempered glass side panel
+ Good cable management system
+ RGB capable LED lighting feature
+ Modern and simple exterior design
+ Sound dampening materials throughout
+ Removable dust filters for easy cleaning
+ Supports large 280mm or 360mm radiators at the front


– Limited water cooling potential
– Rear supports only a 120mm fan/radiator
– No support for CPU coolers over 160mm tall
– Limited storage potential with 360mm radiator at the front


  • Performance: 8.00
  • Appearance: 9.75
  • Construction: 9.25
  • Functionality: 8.50
  • Value: 9.00

Final Score: 8.90 out of 10.

Quality Recognition: Benchmark Reviews Silver Tachometer Award



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