PC Cases / Accessories

Cooler Master Cosmos C700P Case Review

King of the Full Tower Cases

« A Closer Look - Interior | Final Thoughts and Conclusion »

Hardware Installation and Clearance Compatibility

Test System

  • Core I7 6950x
  • Gigabyte x99 Pheonix SLI
  • 32 gb Corsair Dominator Platinum DDR4 2666 MHz
  • GTX 1080 TI Founders Edition
  • 250 gb Samsung 960 EVO
  • EVGA Super Nova P2 1600 Watts

Water Cooling

  • GPU: Swiftech Komodo Full Cover Block for FE 1080 TI
  • CPU: EK Supremacy Evo (Copper Plexi)
  • Radiator: EK CoolStream XE 360
  • Fans: Cooler Master Master Fan Pro. 4 x 120 mm and 3 x 140mm
  • Pump: EK-DDC 3.2 PWM Elite
  • Reservoir: EK-RES X3 150, 150 ml. Reservoir
  • Fittings: Monsoon 5/8″ OD hardline fittings and EK-ACF 10/13 mm Nickel fittings. XSPC 90° fittings, black chrome.
  • Tubing: Monsoon 5/8″ OD PETG tubing and EK DuraClear 9.5 mm ID x 12.7 mm OD clear tubing.
  • Coolant: Mayhem X1 Clear with Primochill UV Pink dye.

Cooler Master Cosmos C700P Case Review C700P, Cooler Master, Cosmos, custom loop, PC Cases, RGB Lighting 1

It was a pleasure to build in the Cosmos C700P. With so much room, and so many options, this case is designed for a custom loop in mind. The design is very well thought out, and it shows.  Being a full tower, the Cosmos C700P offers plenty of extra space while building. Cooler Masters’ FreeForm Modular system truly shines in the Cosmos C700P. You can completely strip the case down to its frame. This makes the Cosmos C700P a modders dream. No rivets to drill out or welds to break. One could easily take this case apart, paint it and rebuild it with little to no modding experience.  I decided to go with the standard layout for this build.

For convenience, this loop was constructed with a mix of rigid and flex tube, with the majority of it being PETG tubing. I started by first mounting the three 140 mm fans on the top of the case. For this, I used the installed fan bracket on the top of the case.


Next, using the front bracket, I mounted the 360 mm radiator to the bracket, and attached the 3, 120 mm fans. I then mounted the reservoir and pump to the track next to the motherboard tray. The same place the 3.5″ drive bays come mounted. Using flexible tubing, I connected the reservoir to the pump, and the pump to the radiator.Next, I installed the motherboard standoffs. Once the motherboard was installed, I could really start the loop.

The amount of space in the Cosmos C700P made measuring for the tubing easy. The pump and reservoir mounted to the case with ease. The mounting holes on lined up perfectly. Even with the pump and reservoir installed, I still had enough room for a 3.5″ drive bay.

There is ample room behind the motherboard tray for cable management, The placement of the many zip tie loops makes the cable management that much easier. This design was well though out. Right down to the placement of the 2.5″ drive trays. There are zip tie loops every where you would want them. The removable panel on the left helps hide most of the cables anyways. So even if cable management isn’t your strongest area, you can still do a clean build in the Cosmos C700P. Like the front tempered glass panel, the rear panel also has the same dual curve design. This design completely eliminates the annoying bulge some cases get on the rear panel. The mounting solution for the panels is unique, and a welcome change from the norm. Three metal nipples on the panel snap into a steel bracket, mounted on the side of the case. The rear door swings open like the front panel. This design is one of my favorite features of the Cosmos C700P.

The built in fan controller on the Cosmos C700P has two settings, high and low. The MasterFan Pro was my fan of choice for this build. In total, the build has a total of 4, 120 mm fans and 3, 140 mm fans. The 3 x 140 mm fans are installed on the top as exhaust fans. Three of the 120 mm fans are attached to the radiator in a pull configuration. The fourth fan is the exhaust for the case. On the high setting, the Cosmos C700P ran at a quiet 38 decibels. Very quiet. However, on low, the system ran at a whisper quiet 31 decibels. You can hear the water running through the loop over the fans. The MasterFan Pro is RGB ready, but requires an RGB controller. If not controller is installed, the fans can be either red or blue with the flip of a switch. The X99 system in the Cosmos C700P runs whisper quiet and I’m very happy with the end result.


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One Comment

  1. I built the Cosmo C700P reversed around an EVGA Classified SR-2 dual Xeon HPATX motherboard. It worked awesome, fills the case perfectly, posted CUDA rendering records first time out, and looks gorgeous!!!

    The EVGA SuperNOVA 1600W G2 is bottom right; the pcie and sata power cables are completely hidden bottom center to left under the geometric shroud where I keep my emergency backup HyperX SSD out front in the special shock-mounted holder. The dual six-core X5660 2.8 GHz Xeons are air-cooled by twin LED CM V8 GTS fans; 24 RAM slots are good for 48GB factory, 96GB with the “Secret Sauce”; and 7 full length pcie slots in the upper right keep the air-cooled GTX cards right side up for better cooling, like in Mac Pro cases. The only real alteration was to move the vertical HD mounting column/support back on standoffs to clear the colossal SR-2 motherboard; everything else just worked, and the gorgeous double-curved glass door swings out and then right (towards the back of the machine). 4TB of SSD boot and scratch disks are tucked into two special holders on the back of the mobo tray behind a huge double curved black aluminum door; everything is super clean, and super accessible!

    Initial config was with two immaculate EVGA GTX590 Classifieds, and one ROG MARS GTX580x2 for a total of six massive GF110 Fermi GPUs. On the Thea Rendering benchmarks (combined Nvidia CUDA and Intel Embree unbiased 3D rendering performance), this system scored 10,660; crushing many dual and triple GTX 1080ti rigs! Gotta love it!

    The top grill pops off to reveal the very impressive and huge ROG MARS GTX580x2 video card, and the many internal red LEDs hint nicely at the depth, volume, and massive power inside the stunning case! The ROG MARS GTX580x2 supports DisplayPort with audio, and drives a single 27” Apple Cinema LED display with glass face and nice sound. It really compliments the timeless and high quality styling of the C700P!

    For the long term, I plan on re-installing two EVGA GTX580 3GB Classified Ultras under the ROG MARS GTX580x2, and setting up for cool and quiet presentation renderings in a professional industrial design studio. With BIOS temp-controlled and reliable air-cooling fans for all system components, this will prove to be a valuable asset in our bag of extreme-duty design tools. The heavy and hushed sounds of the big fans, the barely audible coil whine, and the subliminal double-curved tempered and LED lit smoked-glass case tell clients they are in for an experience they will not soon forget…

    For showcasing the vintage and classic dual Xeon SR-2, and the massive CUDA video cards it can support, the Cooler Master Cosmo C700P is the one to see! Everyone loves it!


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