This article covers Corsair Obsidian 750D E-ATX規格対応 パフォーマンスフルタワーPCケース CS5316 CC-9011035-WW ブラック.

Overview

The Corsair Obsidian 750D is a full-tower PC case from Corsair that supports the E-ATX form factor and emphasizes expansion. Its interior provides up to 450mm of graphics card clearance and 170mm of CPU cooler height, allowing you to install large modern GPUs and towering air coolers without hassle. The case ships with three 140mm fans (two front, one rear) and can accommodate up to nine fans in total, making it capable of handling even high-end cooling requirements. Front, top, and bottom dust filters simplify maintenance.
The chassis features a black finish with an acrylic side window to showcase your components. Cable management is aided by multiple routing holes and roughly 25mm of clearance behind the motherboard tray. Nine expansion slots support multi-GPU setups, and the case weighs about 10.7kg (23.6 lbs). In the market, the Obsidian 750D sits at the mid-to-high tier among full-tower E-ATX cases and has been a popular choice for enthusiasts planning large liquid-cooling systems or extensive storage arrays.
This review covers compatibility details, assembly caveats, and the types of users for whom this case is best suited.

Compatibility Guide

The case supports E-ATX motherboards and also accommodates standard ATX boards. If you have an extra-wide E-ATX board exceeding 305mm in width, you should verify that it will fit within the interior. The power supply area accepts ATX PS/2 units, and long high-wattage PSUs can be installed without issue.
Graphics cards up to 450mm in length are supported, which covers most flagship GPUs on the market. CPU coolers up to 170mm tall are allowed, so large dual-tower air coolers work fine. For liquid cooling, the top panel can mount 280mm or 240mm radiators, and the front offers similar support. The case was designed with 280mm and 240mm AIO coolers in mind, and custom loops are also possible. However, when mounting a radiator at the top, check for interference with VRM heatsinks or tall memory modules.
Storage options include six internal drive bays, allowing multiple 3.5-inch HDDs or 2.5-inch SSDs. The front panel offers two USB 3.0 ports; if you need more connections, a USB hub is recommended.

Product Info

The Obsidian 750D was introduced around 2013 but remains available for purchase through retailers like online retailers. In Japan, it is sold as an authorized distributor product with a two-year warranty. Pricing on online retailers is approximately 68,000 yen. The case sits in the mid-to-high tier of full-tower E-ATX enclosures and was a flagship design at its launch. While mid-tower cases dominate today, this model still appeals to users who want extensive radiator support and large drive capacity.

Best Use Cases

  • High-end gaming PC builders: With 450mm GPU clearance, cards like the latest flagship GPUs will fit easily, and liquid cooling for the CPU is also supported. However, if a mid-tower would suffice, this case may be larger than necessary.
  • Content creators who need massive storage: The six drive bays provide ample room for HDDs and SSDs, and the nine-fan capacity helps keep everything cool. On the downside, the case is heavy for frequent transport.
  • Enthusiasts planning a custom water-cooling loop: Plenty of radiator mounting space and dust filters make maintenance straightforward. Users who prefer compact systems should look elsewhere.

Things to Consider

This case is large and heavy, so make sure you have enough desk or floor space. The front I/O only has two USB ports, so a hub may be necessary for many peripherals. The acrylic window can scratch easily, requiring careful handling. Compared with modern cases, you won't find USB Type-C on the front panel, and the front-panel connector standard is older, so an adapter might be needed. Nevertheless, the expansion capacity remains comparable to today's high-end towers.

FAQ

Q: Can I use any E-ATX motherboard in this case?
A: The case officially supports E-ATX, but boards wider than 305mm may not fit. Measure your motherboard before purchase.
Q: Will a 360mm radiator fit?
A: No. The top only supports up to 280mm radiators, so you should choose a 240mm or 280mm unit.
Q: Are modern components compatible with this case?
A: Yes, for GPU length and cooler height. However, the front panel lacks USB Type-C, so consider using an adapter or hub if needed.

Product Disclosure (Amazon)

  • Manufacturer: CORSAIR
  • Seller: クリエイトハマダ
  • Fulfilled by: クリエイトハマダ
  • ASIN: B00EB6O4N8
  • Note: This article covers a manufacturer-made product based on Amazon listing details.