The Cooler Master Cosmos C700M ups the game compared to the original C700P in many ways, including price. While the P variant came in at US$299, the new and improved C700M adds a whooping US$140 to that, resulting in a US$439.99 MSRP. For that, you get more steel, better liquid cooling support, a full set of addressable RGB embedded into the chassis, alongside a better quality controller, and, last but not least, a PCIe ribbon cable and presentation stand. All this could be worth the extra money, but things don't simply end there. Cooler Master has also improved and added more parts to the inside, like the 2.5" drive mounting plates or the fact that the C700M now sports a multi-stage fan controller. Materials have also been improved, with a sturdier front cover and brushed aluminium on the top and front of the case.

With the C700 series, Cooler Master brought the essence of the MasterConcept to the consumer market; the aim of having an essentially fully customizable chassis with the ability to buy bits and pieces to accommodate an ever-changing hardware setup or the evolving needs of the user. The case is also meant to be accessible to modders, which has it go along the lines of the "Make It Yours" mantra that is at the core of the Cooler Master brand these days. The C700M moves forward in the same direction with a bit more fine-tuning by including an additional backplate for the "chimney" setup, for instance.

The biggest strength of the Cosmos C700M is its modularity. The ability to take the case apart completely and be left with nothing but a frame is not only unique, but extremely well executed, for the most part. The only issue here is the complex upgrade path should you want to change GPUs, for example, as the modularity comes at the price of having to take the system apart just to reach them properly. Maybe using thumb screws here instead of traditional ones would have helped alleviate the issue a bit. Alternatively, Cooler Master could include a little tool to reach these screws without disassembly.

In regards to the exterior, the Cosmos C700M clearly refines the standard Cooler Master has set for the modern Cosmos line when they launched the C700P. The elaborate material mix of metal mesh, glass, plastic, and steel remains, which also brings similar issues of small imperfections upon closer inspection. Think of the Cosmos C700M as a Tesla—beautiful, but some of the gaps and transitions between panels/pieces could be a bit more refined.

Overall, the Cosmos C700M ends up fixing many of the smaller and somewhat bigger issues we covered in the C700P, all while adding more features and functionality. The downside of these improvements is the fact that the Cooler Master Cosmos C700M will cost you a considerable chunk more for all that additional bang. This just means that the price/performance/feature set triangle has stayed essentially the same as you pay for what you get.