SKU: 35770047331

Supermicro SuperChassis 835TQ-R921B

Sale price$746.60 Regular price$829.55
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Description

Supermicro SuperChassis 835TQ-R921BThe Supermicro SuperChassis 835TQ R921B is engineered for demanding data center environments where reliability, density, and expandability matter. This 3U rack mount chassis delivers a rigid, black painted enclosure with room for a versatile storage configuration and powerful server components. Designed to support E ATX and ATX motherboards, it provides a robust foundation for enterprise servers, virtualization hosts, dense storage nodes, and high

The Supermicro SuperChassis 835TQ-R921B is engineered for demanding data center environments where reliability, density, and expandability matter. This 3U rack-mount chassis delivers a rigid, black-painted enclosure with room for a versatile storage configuration and powerful server components. Designed to support E-ATX and ATX motherboards, it provides a robust foundation for enterprise servers, virtualization hosts, dense storage nodes, and high-performance computing deployments. With 11 external drive bays, dual 920 W power supplies installed, and seven PCIe expansion slots, the 835TQ-R921B delivers both the capacity and the flexibility to power modern workloads while fitting neatly into standard 19-inch racks.

  • Compact 3U rack-mount design for dense deployments: This chassis optimizes rack space, enabling high-density configurations without sacrificing accessibility or serviceability. The 3U form factor is ideal for data centers seeking efficient use of rack real estate while maintaining room for future upgrades.
  • Extensive external drive bay family for flexible storage: Equipped with 3 external 5.25" bays and 8 external 3.5" bays, the 835TQ-R921B supports a wide range of storage strategies—from boot drives and optical media needs to large-scale data storage and archival layouts. The modular bay layout makes it easy to tailor storage performance to specific workloads and growth trajectories.
  • Pre-installed cooling to handle high-demand workloads: Featuring 5 x 3.15" fans pre-installed for effective airflow, this chassis is prepared to sustain performance in busy rack environments. Efficient cooling helps maintain component longevity and reduces downtime risk during peak operations or heavy I/O activity.
  • Redundant power for reliability and uptime: Two 920 W power supplies are installed to deliver redundancy and stable power delivery. This configuration supports mission-critical services, minimizes risk of downtime due to power supply failure, and provides headroom for future expansion and peak workload demands.
  • Broad compatibility and expansion slots for future-proofing: The chassis supports E-ATX and ATX motherboards and offers 7 PCIe expansion slots for GPUs, NICs, storage controllers, or other adapters. This makes the 835TQ-R921B a versatile platform for virtualization, data processing, networking, and accelerator-based workloads, while maintaining a clean, organized internal layout for easy maintenance.

Technical Details of Supermicro SuperChassis 835TQ-R921B

  • Chassis type: 3U rack-mountable chassis
  • Color/finish: Black
  • Motherboard compatibility: E-ATX and ATX
  • Drive bays: 11 external bays (3 x 5.25", 8 x 3.5")
  • Cooling: 5 x 3.15" fans installed
  • Power supply: 2 x 920 W power supplies installed
  • Expansion slots: 7 PCIe expansion slots
  • USB connectivity: 2 x USB ports
  • Chassis height: 3U

How to install Supermicro SuperChassis 835TQ-R921B

Installing the 835TQ-R921B in a standard data center rack is straightforward and designed for dependable serviceability. Start by preparing a clean, stable rack and ensuring you have compatible rail kits for a 19-inch installation. Slide the chassis into the rack, align the mounting holes, and securely fasten the unit with screws to ensure rigidity during operation and maintenance. Connect both 920 W power supplies to a reliable power source that supports redundancy, and verify that both units engage correctly before powering on. Install your motherboard in the appropriate orientation, using the standoffs designed for E-ATX or ATX form factors, and mount the I/O shield. Next, populate the external drive bays with your storage devices—three 5.25" bays for ancillary drives or media, and eight 3.5" bays for primary storage or data drives. Route and manage all data and power cables neatly to avoid airflow obstruction, then install PCIe expansion cards into the seven available slots based on your workload—NICs for networking, GPUs for compute acceleration, or storage controllers for enhanced I/O performance. Use the two USB ports for maintenance tasks, boot media, or firmware updates as needed. After all components are installed, perform a thorough power-on self-test, verify POST, check BIOS/firmware settings, and validate RAID or storage configurations to ensure your deployment meets performance expectations. Regular rack maintenance, dust management, and cable organization will help sustain long-term reliability in busy data centers.

Frequently asked questions

  • What motherboards does the chassis support? It supports E-ATX and ATX motherboards, giving you flexibility for a wide range of server and workstation configurations.
  • How many drive bays are available on the chassis? There are 11 external drive bays: 3 x 5.25" bays and 8 x 3.5" bays, enabling versatile storage setups for OS, data, and expansion needs.
  • What power supplies are included? The unit ships with two 920 W power supplies installed to provide redundancy and reliable power delivery for demanding workloads.
  • What is the chassis height and form factor? The chassis is a 3U rack-mountable enclosure, designed for dense deployments in standard data center racks.
  • What color is the chassis? The SuperChassis 835TQ-R921B features a black finish, suitable for professional data center aesthetics and rack alignment.
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: 35770047331

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4.2 ★★★★★
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bicyclemayhem
Chelsea, US
★★★★★ 4
Mostly great, except one little annoyance
Color: Black&Silver, Color: Black&Silver
Pros- lightweight, small, very accurate, easy to clean, timer included. Cons- I use this to brew espresso on my Breville Touch and to get an accurate reading, you have to place something flat (structured) under the scale. Otherwise the reading just jumps all over the place. I know lot of espresso machines have the same base, so this might be an issue for some! This is my reason for 4/5 stars. It’s an easy fix, it’s just kind of annoying. Value for the price seems to be on point. It’s easy to clean. It has a timer as well as scale (nice for espresso). Buttons work the first time you push them. That’s it that’s all
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Reviewed in the United States on January 31, 2026
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Verified Purchase
payton whitten
Lowell, US
★★★★★ 5
Beautiful, functional, and perfect for a stylish coffee bar
I absolutely love this scale. As someone who cares about both function and aesthetics, this was exactly what I was looking for. It’s refreshing to find a high-quality kitchen tool that doesn’t force you to sacrifice the look of your space. The white and gold design is stunning and fits perfectly on my coffee bar without looking bulky or industrial. Functionally, it works flawlessly. I primarily use it to measure my coffee beans, but I’ve also used it for other items, and it’s consistently accurate and easy to use. The size is perfect — compact enough to keep out on the counter without taking up space, yet large enough to be practical and stable. The display is clear, the buttons are responsive, and the overall build feels solid and well made. I also appreciate how intuitive it is to use — no learning curve at all. If you’re someone who loves a beautiful, cohesive kitchen setup but still wants reliable, quality tools, I would highly recommend this scale. It’s small, stunning, and performs exactly as it should.
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Reviewed in the United States on January 4, 2026
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Verified Purchase
Caroline Rose
Charlottesville, US
★★★★★ 5
Great scale, an excellent buy
Color: Black&Silver
Is it possible to fall in love with a scale? I unboxed this one and, without reading any directions, put an empty 1/4 cup on it, turned the scale on, filled the 1/4 cup with coffee beans till I had the desired 17 or so grams, and turned the scale off. Easy-peasy! It’s small but sensitive, able to tell when a single bean has been added or removed. I almost didn’t get it because of the charging issue, but at least it tells you what the current charge is, and the way I use it I believe it will last several months without recharging. I’m so glad I bought this scale!
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Reviewed in the United States on April 14, 2026
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Verified Purchase
R. Kernisant
Carnegie, US
★★★★★ 5
Simple yet easy must have for discerning coffee drinkers
Color: Black&Silver
I seem to never get the same results from my coffee machine and it varied even more with the new brand that we just bought. I now have to make more adjustments with the water temperature, based on age, type of beans, etc. That affects the amount of ground dispensed and consistency in the shot until I get a new batch dialed in. So the only way to regulate these changes is to weigh both the beans and water. Using this little scale has made things easier, less frustrating and more predictable. What’s awesome is that it will automatically begin the timer with the first drop and stop when the pressure remains constant. Simple yet easy and super convenient. If you are looking for a great little digital scale this should do the trick. Highly recommended.
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Reviewed in the United States on February 4, 2026
M
Verified Purchase
Memphis Tigers 🐯
Whiting, US
★★★★★ 5
Great Digital Scale!!
Color: Black&Silver
The Maestri House S2 scale has been clutch for dialing in my espresso shots. Memphis heat or not, this thing stays accurate and steady. The timer starts up quick, the readings are fast, and the compact size fits perfectly under my Breville without feeling cramped. It’s built solid, charges by USB‑C, and the precision really shows when you’re trying to get that perfect pull.
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Reviewed in the United States on June 7, 2026

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