SKU: 49198286298

iStarUSA D-400S3 Rackmount Enclosure

Sale price$129.01 Regular price$143.34
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Description

iStarUSA D-400S3 Rackmount EnclosureThe iStarUSA D 400S3 Rackmount Enclosure is an ultra compact, industrial grade 19 inch chassis designed to deliver exceptional expandability without sacrificing footprint. With a thoughtful balance of depth, airflow, and accessibility, this enclosure is tailor made for space constrained data centers, labs, edge deployments, and rugged industrial environments. Its compact 13. 7" depth enables tight rack installations while still providing robust

The iStarUSA D-400S3 Rackmount Enclosure is an ultra-compact, industrial-grade 19-inch chassis designed to deliver exceptional expandability without sacrificing footprint. With a thoughtful balance of depth, airflow, and accessibility, this enclosure is tailor-made for space-constrained data centers, labs, edge deployments, and rugged industrial environments. Its compact 13.7" depth enables tight rack installations while still providing robust support for mainstream components, making it an ideal foundation for compact workstations, compact servers, or modular compute nodes that demand reliable performance in a durable, space-saving chassis. Built to accommodate a wide range of hardware, the D-400S3 emphasizes versatility—giving administrators and integrators a single, scalable enclosure that can grow with evolving workloads and storage needs.

  • Compact 13.7" depth: Designed to fit comfortably in standard 19" racks, the D-400S3 maximizes usable rack space, reduces cable clutter, and simplifies cooling management in crowded environments.
  • Full-size ATX motherboard compatibility: The full-size I/O area supports all ATX motherboards, enabling broad platform choice and compatibility with mainstream CPUs, GPUs, NICs, and other essential components.
  • Expansion capacity up to seven full-height add-on cards: This chassis is built for dense expansion, allowing GPUs, RAID controllers, network adapters, and other PCI/PCIe cards to be installed in a compact footprint to handle demanding workloads.
  • Dual external 3.5" drive bays with support for up to 4 x 2.5" drives via BPU-2535: Perfect for flexible storage configurations, hot-swap options, and high-throughput data access in a compact server or workstation.
  • One slim 5.25" bay for optical or other slim devices: Provides additional versatility for media, diagnostic tools, or legacy peripherals without compromising overall rack efficiency.

Technical Details of iStarUSA D-400S3 Rackmount Enclosure

  • Depth: 13.7 inches (compact chassis designed for space-constrained racks)
  • Motherboard compatibility: Full-size ATX motherboard I/O, enabling broad compatibility with current-generation CPUs and PCIe devices
  • Expansion slots: Up to seven full-height add-on cards, offering expansive I/O, GPU, or controller options in a single 19" enclosure
  • Drive bays: Two external 3.5" drive bays; supports BPU-2535 for up to four 2.5" drives (adds flexible, high-density storage capacity)
  • Bay configuration: One 5.25" slim bay for optical or other slim devices
  • Chassis design: Industrial-grade rackmount enclosure built to endure demanding environments while delivering reliable performance

How to Install iStarUSA D-400S3 Rackmount Enclosure

  • Prepare the rack: Verify that the rack rails are compatible with a 19" rackmount chassis and install the rails according to your rack manufacturer’s guidelines. Ensure the mounting surface is clean and free of obstructions to promote proper airflow.
  • Mount the enclosure: Slide the D-400S3 into the rack, align mounting holes with the rails, and secure the chassis using screws or hardware provided by the rack kit. Confirm that the enclosure sits level and that there is sufficient clearance for rear cable management.
  • Install the ATX motherboard: Open the chassis access panel and mount your full-size ATX motherboard to the internal tray, aligning the I/O shield with the rear cutouts. Secure the motherboard with standoff screws and connect essential power and data cables, including the 24-pin ATX power connector and CPU power leads.
  • Configure expansion cards: Determine your workload and install up to seven full-height expansion cards into PCIe/PCI slots. Maintain proper spacing between cards to promote adequate airflow and reduce thermal throttling. Re-seat cards if any slot is initially difficult to engage.
  • Set up storage: Install drives into the two external 3.5" drive bays, or use iStarUSA BPU-2535 adapters to support up to four 2.5" drives, depending on your storage strategy. Route cables cleanly to the rear and secure drive trays to minimize vibration and movement during operation.
  • Install the slim bay device: If you plan to use a 5.25" slim device (optical drive or similar), insert it into the slim bay and connect its data and power cables. Ensure the cables are neatly managed to avoid obstructing fans or airflow pathways.
  • Power up and test: Connect the power supply, perform a POST check, and verify that all installed components are recognized by the system. Confirm that fans operate correctly and monitor thermals during a brief burn-in to ensure stable operation.
  • Cable management and airflow: Organize front-to-rear cables to improve airflow and reduce dust collection. Use any available cable routing channels or ties to maintain a clean interior, which helps maintain component longevity and consistent performance.

Frequently asked questions

  • Q: What motherboard size does the D-400S3 support? A: The enclosure supports full-size ATX motherboards via its standard I/O area, providing broad compatibility with many mainstream platforms.
  • Q: How many expansion cards can I install? A: You can install up to seven full-height add-on cards, enabling substantial expansion for GPUs, NICs, storage controllers, and other PCI/PCIe devices within a compact 19" rack enclosure.
  • Q: What are the drive configurations? A: The enclosure includes two external 3.5" drive bays. It also accommodates up to four 2.5" drives when using iStarUSA BPU-2535 adapters, offering flexible storage expansion without compromising rack space.
  • Q: Is there a bay for optical drives? A: Yes, there is one slim 5.25" bay suitable for optical drives or other slim devices to support data transfer and maintenance tasks in a compact form factor.
  • Q: What is the depth of the enclosure? A: The D-400S3 features a shallow 13.7" depth, purpose-built to maximize rack density and ease integration in space-limited environments.
Shipping Notes
  • Free Standard Shipping on $100+ Orders to the USA.
  • Except Preorder products are shipped in 48 hours.
  • Delivery to the USA:
  1. Standard Shipping : 3-10 business days
  • If time is of the essence, please consider selecting expedited delivery for faster service.
Exchange/Return Notes
  • We offer a 30-day return/exchange service after receiving.
  • Final sale items are not eligible for returns or exchanges.
  • To process your return/exchange, please contact us at [email protected]
  • Please click here for more details>>> Return & Exchange Policy
SKU: 49198286298

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4.3 ★★★★★
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Alyssa Romano
Lake Worth, US
★★★★★ 5
Great set of pillows!!!
Size: Standard (Pack of 2), Style: Soft, Configuration: Pillow
I ordered this set of two down alternative pillows to replace some older pillows, and I’m honestly really impressed with the quality. Right out of the package, the pillows fluffed up nicely and felt soft yet supportive. They have that plush feel you want without being too flat or too firm, which makes them comfortable in multiple sleeping positions. I’ve been sleeping on these for a bit now and they’ve held their shape well throughout the night. They provide good neck support while still feeling cozy, and I don’t wake up with soreness or stiffness. What I like most is how breathable they feel compared to some other pillows I’ve tried. They stay comfortable without overheating, and the down alternative fill makes them a great option for anyone with allergies. Overall, this set is an excellent value for the price. If you’re looking for soft, supportive pillows that feel comfortable and well made, I would definitely recommend these.
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on February 10, 2026
G
Verified Purchase
Gary
Whiting, US
★★★★★ 4
Great, soft, high-quality pillows, but too thick for me
Size: Standard (Pack of 2), Style: Soft, Configuration: Pillow
This will be a brief review of my pillow journey. I tried a few of the most popular pillows, like MyPillow, Amazon Basics, bamboo/shredded foam, memory pillows, but my most common complaint about them were that they were all just too high and firm for me. I am a restless sleeper and alternate between back, side, and stomach sleeping, and I strongly preferred the stomach sleeper/flat pillows with a polyester fiber/down alternative filling. Here's a ranking of my 4 top pillows: Eversnug Adjustable Layer Pillows - (#1) These were THE pillow for me. I had never heard of these pillows or the company, but I really like being able to adjust my pillow. These pillows came with 2 small, 2 medium, and 2 large pillows and 2 twin zippable pillow pouches. All of them were polyester fiber filled and somewhat flat and soft, but not lumpy. The pillows may not come the exact same sizes, but they are close enough for me. These are the pillows I ultimately decided to stick with, despite being slightly more expensive than the others at $50 for a set of 2 pillows. Nappler Bamboo Shredded Memory Foam Pillow - (#2) Before I found the Eversnug pillows, I was trying the adjustable bamboo shredded memory foam ones. These were my go-to whenever I was testing pillows I didn't like very much. The only downside to these pillows is that if you don't add enough filling, you could feel the edges of the shredded foam. Also, the "bamboo" cover was way too warm and the inner zipper would get too easily caught. Amazon Basics Down Alternative Pillow - (#3) I don't think I've ever been disappointed by an Amazon Basics product yet. These pillows were soft, amazing pillows, but they were 1-2 inches too thick/firm for me. MyPillow - (#4) Despite all the hype around these, they were too lumpy and 1 inch too thick for me. Like I said previously, I ended up going with the Eversnug Adjustable pillows, which I absolutely adore. A tiny bonus is that you can take the pillows you don't use and rest them on your sides or between your knees for some extra cushioning.
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on July 12, 2023
Y
Verified Purchase
Yi Xuan
Lowell, US
★★★★★ 5
Good price and pretty comfortable
Size: Standard (Pack of 2), Style: Soft, Configuration: Pillow
These down alternative pillows are incredibly soft and comfortable, especially for stomach and back sleepers. The soft density gives just the right amount of support without feeling too firm or too flat. I’ve been sleeping much better since switching to these pillows, and they stay fluffy throughout the night. I also love that they’re hypoallergenic, so there’s no irritation or overheating while sleeping. The standard size fits perfectly in my pillowcases, and the white color looks clean and fresh. Getting a 2-pack at this quality is a great value. Highly recommend for anyone looking for cozy, hotel-style pillows at an affordable price!
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Reviewed in the United States on May 11, 2026
M
Verified Purchase
Michelle H
Lake Worth, US
★★★★★ 5
Comfortable Pillows
Size: Standard (Pack of 2), Style: Soft, Configuration: Pillow
These pillows have a nice soft feel and are so comfortable. They’re supportive without being too firm, so my neck feels comfortable throughout the night. They’re lightweight, fluffy, and easy to adjust for different sleeping positions. The material feels smooth and well-made, and the pillows hold their shape better than I expected for the price. They use some alternative fill instead of real feathers which is good for people with allergies.
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Reviewed in the United States on March 30, 2026
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Verified Purchase
Cassie
Pawtucket, US
★★★★★ 3
Mid range quality
Size: Standard (Pack of 2), Style: Soft, Configuration: Pillow
They work for kids who aren’t picky. Size fit twin bedding well. Look nice and clean. Quality is mediocre. It wasn’t filled very much even after giving time for it to breathe and fluff. Kind of lumpy and lopsided.
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Reviewed in the United States on February 28, 2026

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