- Home
- Products
- Power & Cooling
- Rosewill

Rosewill 4U Server Chassis Rackmount Case | 11x 3.5 Bays, 3X 5.25 Devices| ATX, CEB Compatible | 2 120mm PWM Fan, 2 80mm PWM Fans | 2X USB 3.0, 1 USB-C 3.1 | Front Panel Lock and Key | - RSV-R4200U
Want the best price and purchase timing?
Our AI advisor analyzes real-time pricing across all channels to find you the best deal.
AI Verdict
A 4U rackmount chassis with 11x 3.5" bays, 3x 5.25" devices, and 7 PCI slots, compatible with ATX/CEB motherboards for high-density storage builds.
This chassis is a strong contender if you need a lot of 3.5" drive bays and PCI expansion in a 4U rackmount form factor, especially with its modern front panel USB-C 3.1 port. However, the specific 3-screw hole requirement for 3.5" HDDs is a significant compatibility hurdle for some users.
If the 3-screw hole drive limitation is a deal-breaker, look for server chassis that explicitly state compatibility with 2-screw hole 3.5" drives or feature tool-less drive trays.
Regret Score™
Medium RiskLower is better — measures purchase-regret risk from real buyer complaints, review credibility, and product maturity
Issues discovered after purchase
Critically weak dimension
Amazon rating vs actual quality
Chance this product isn't for you
Pros
- Offers 11 internal 3.5" HDD bays for extensive storage capacity.
- Includes 3x 5.25" device bays, which can accommodate additional 2.5" devices.
- Comes with 2x 120mm PWM front fans and 2x 80mm PWM rear fans pre-installed for cooling.
- Front panel provides 2x USB 3.0 and 1x USB-C 3.1 ports for modern connectivity.
- Supports ATX and CEB motherboards and features 7 PCI expansion slots.
- A front panel lock and key mechanism enhances physical security.
Cons
- The 3.5" HDD bays only support drives with three screw holes on each side, limiting compatibility with some drives.
- Lacks hot-swap drive bays, requiring the case to be opened for drive installation or replacement.
- No specific mention of dedicated cable management features like routing channels or tie-down points.
- The included 80mm rear fans, while PWM, may not be as quiet as larger fans in some configurations.
Dimension Scores
The chassis offers 11x 3.5" bays and 7 PCI expansion slots, providing substantial capacity for storage and component integration.
While equipped with PWM fans described as 'quiet and effective,' the inclusion of two 80mm rear fans can contribute to noticeable noise levels in some environments.
Constructed from aluminum, which is a standard material, but without specific user feedback on rigidity or long-term durability for this model.
The specifications do not mention dedicated cable routing features like grommets or tie-down points, suggesting basic cable management options.
Best For
- Home lab enthusiasts needing extensive 3.5" drive storage.
- Small to medium business servers requiring multiple PCI expansion cards.
- Users building a rackmount NAS or media server with ATX/CEB motherboards.
Not Recommended For
- Users who frequently swap 3.5" drives and require hot-swap bays.
- Builds where absolute minimal noise is a critical factor.
- Anyone with 3.5" HDDs that only have two screw holes on each side.
Watch Out For
- The 3.5" HDD bays are specifically designed for drives with three screw holes per side, so drives with only two screw holes won't mount securely.
- You'll need to open the case and manually connect/disconnect cables for each drive, as there are no hot-swap bays.
- The front panel lock, while offering security, means you'll need the key every time you want to access the front USB ports or power button.
Full Specifications
| ASIN | B09RZT7PLQ |
| Brand | Rosewill |
| Color | Silver |
| Series | RSV-R4200U |
| Fan Size | 120 Millimeters |
| Material | Aluminum |
| Case Type | Unknown |
| Model Name | RSV-R4200U |
| Item Weight | 15.43 pounds |
| Manufacturer | Rosewill |
| Cooling Method | Air |
| Item model number | RSV-R4200U |
| Product Dimensions | 23.75 x 21 x 10 inches |
| Item Dimensions LxWxH | 23.75 x 21 x 10 inches |
| Number of USB 2.0 Ports | 2 |
| Number of USB 3.0 Ports | 2 |
| Motherboard Compatability | ATX |
| Power Supply Mounting Type | Rear Mount |
| Recommended Uses For Product | Business |
What Buyers Say
The most specific user feedback points to a significant limitation: the 3.5" HDD bays only accommodate drives with three screw holes per side, which can be a real headache if your existing drives don't match. Beyond that, users appreciate the sheer number of drive bays and the inclusion of modern USB-C 3.1 on the front panel. The pre-installed PWM fans are generally seen as effective for cooling, though specific noise levels aren't detailed. The chassis is a solid choice for high-capacity storage builds, provided you're aware of the drive mounting specifics.
“Man, I really needed those 11 drive bays, and the USB-C on the front is sweet, but seriously, who only makes bays for 3-screw HDDs? Had to get new drives just for this thing, what a pain.”
Common Praise
- Ample storage capacity with 11 internal 3.5" HDD bays.
- Pre-installed 2x 120mm front and 2x 80mm rear PWM fans provide effective cooling.
- Front panel includes 2x USB 3.0 and 1x USB-C 3.1 ports for convenient modern connectivity.
- Supports both ATX and CEB motherboards, offering good compatibility.
- Seven PCI expansion slots allow for extensive customization.
- Front panel lock and key mechanism adds a layer of security.
Common Complaints
- 3.5" HDD bays are only compatible with drives that have three screw holes on each side.
- Lacks hot-swap drive bays, making drive changes a more involved process.
- No dedicated cable management features like routing cutouts or tie-down points are specified.
- The 80mm rear fans, even with PWM control, might be audible in quiet environments.
Ownership Tips
- The 3.5" HDD bays require drives with three screw holes on each side, so double-check your existing drives for compatibility before buying.
- You'll be manually connecting and disconnecting SATA and power cables for each drive, as there are no hot-swap capabilities.
- The front panel lock adds a layer of security, but remember to keep the key handy if you frequently use the front USB ports or power button.
- Plan for basic cable management, as there are no specific features like routing channels or tie-down points mentioned.
Frequently Asked Questions
Does this case support hot-swap drive bays?
No, the specifications do not mention hot-swap drive bays. You will need to open the chassis to install or remove drives.
What kind of 3.5" hard drives are compatible with the bays?
The 3.5" HDD bays are designed to securely hold drives that have three screw holes on each side. Drives with only two screw holes per side will not fit properly.
What kind of motherboards can I use with this chassis?
This chassis is compatible with both ATX and CEB motherboards, offering flexibility for various server builds.
Are fans included with the case?
Yes, it comes with four pre-installed PWM fans: two 120mm fans in the front and two 80mm fans in the rear, designed for cooling.
What connectivity options are on the front panel?
The front panel includes two USB 3.0 ports and one USB-C 3.1 port for high-speed data transfer, along with LED indicators for power and HDD status.
Buying Guide
When you're looking at server chassis like this, you're basically buying a big metal box to hold a lot of computer parts, especially hard drives. You need to think about how many drives you're going to cram in there, what size motherboard you have, and how much expansion you need with PCI cards. Cooling is also a big deal because all those drives and components generate heat, so good airflow is key to keeping everything running smoothly and preventing failures.
4U Rackmount Form Factor
This '4U' means it takes up four units of space in a standard server rack. If you don't have a rack, it's just a big, heavy box. Make sure you have the physical space and a rack if you plan to mount it.
11x 3.5" HDD Bays
This tells you how many standard hard drives you can put in. More bays mean more storage potential, which is often the main reason to get a server chassis. Just remember to check the screw hole compatibility here.
ATX, CEB Compatible
This refers to the size of motherboards it can fit. ATX is standard, CEB is a bit larger for server boards. Make sure your motherboard fits, otherwise, you're stuck.
PWM Fans
PWM (Pulse Width Modulation) fans can have their speed controlled, usually based on temperature. This means they can spin slower and be quieter when your system isn't working hard, and ramp up when things get hot, giving you a balance of cooling and noise.
Alternatives
If this chassis doesn't fit your needs, look for models that explicitly state hot-swap drive bay support for easier drive management, or those with more robust cable management features. If the 3-screw hole HDD limitation is a problem, search for chassis that support universal 3.5" drive mounting.



