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Phanteks Eclipse P400S Review


Phanteks Eclipse P400S Specifications:

Model Number: PH-EC416PSTG_BR
Form Factor:
Mid Tower
Black (exterior) / Red (interior)
7 kg (15.4 lbs)
Side Panel: Tempered glass side panel
CPU Cooler Compatibility: Up to 160mm
GPU Compatibility: Up to 395mm
Motherboard Compatibility: ATX, Micro ATX, Mini ITX,
E-ATX *(up to 272mm wide, cannot use rubber grommets)
210 mm x 465 mm x 470 mm (W x H x D) 8.3 in x 18.3 in x 18.5 in
Power Location: Rear Bottom
Internal 3.5" / 2.5" Drive: 6X (2X included)
Internal Dedicated 2.5": 2X (2X included)
Soundproofing Panels:
Yes, Front / Top / Sides
Front I/O: 2x USB 3.0, Mic, Headphone, Reset, LED control,
3-speed Fan controller (only available for P400S)
Rear Fan:
1x120mm, 1 included
Front Fan: Up to 3 X 120mm fan, (1 included) or 2 X 140mm fan (not included)
Top Fan: 2 X 120mm (not included) or 2 X 140mm (not included)
Radiator Support:
Front: Up to 360mm
Rear: Up to 120mm
Expansion Slots:


Phanteks Eclipse P400S Features:

  • Tempered glass side panel
  • RGB lighting (10 colors)
  • Sound deadening material on panels
  • Front dust filters
  • Removable top covers
  • 3-speed fan controller
  • Space for 2 x 120mm or 2 x 140mm fans on top
  • Space for 3 x 120mm or 2 x 140mm fans in front (1 x 120mm fan included)
  • 1 x 120mm fan port in the rear (installed)
  • Supports 120mm / 240mm / 280mm / 360mm front water cooling radiator
  • Supports max. 395mm GPU

All information courtesy of Phanteks: http://www.phanteks.com/Eclipse-P400S-TemperedGlass.html


Phanteks Eclipse P400S Case Testing:

Testing involved recording temperatures in degrees Celsius for the CPU and GPU during idle and load phases. The load was simulated by running Prime95’s small FFTs and 3DMark Vantage for one hour. The maximum temperatures were recorded using HW Monitor 1.21.0. Please note that each case is tested from its factory setup, including the location of fans unless otherwise noted.


Testing Setup:




A thermal imaging camera is a great tool that shows a visual representation of where the heat is concentrated. In the picture to the left, the CPU is at idle and shows exhaust air at around 27.3 °C. This, of course, varies as you move around the case, but only by a degree or two when the system is not under a load. The blue areas are the coolest (ambient) followed by shades of red, which are a little warmer, increasing to orange, and finally, the warmest being yellow. The fans from the D14 CPU cooler direct the excess heat to the rear of the case, where it is ultimately pushed out of the case. After kicking in the mild overclock, the temps go up close to 43 °C coming out of the rear of the case. There are a couple more hot spots below the exhaust fan - one is the GPU and then toward the bottom is the 750W power supply working hard (and generating heat) to supply the system with plenty of power.

The GPU testing shows similar results to other test cases in the same size range, and this is to be expected when using a reference style (blower) GPU. The blower on a reference card pulls cool air from the case and ejects it out of the rear, so heat build up in the case is really minimized and is the reason why I like reference-style coolers. However, reference style cards tend to be a bit noisy when the fan spools up, and if you have more than one reference style GPU, it can sound like an airport.

With all the thermal testing completed, the P400S performed as expected, and the included front 120mm fan and single rear 120mm fan did a decent job of keeping the air moving through the case. There is room for additional fans, so you have the opportunity to improve cooling even more. Most people don't run their systems in a constantly stressed state, so heat build-up is not really an issue, but this testing shows that the P400S can tackle the heat.


Buy Now from Amazon

  1. Phanteks Eclipse P400S: Introduction & Closer Look
  2. Phanteks Eclipse P400S: Specifications & Testing
  3. Phanteks Eclipse P400S: Conclusion
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