Rosewill 4U Server Chassis Rackmount Case | 15 3.5" HDD Bays | E-ATX Compatible | 6 Front 120mm Fans, 2 Rear 80mm Fans | 2X USB 3.0 | Front Panel Lock and Key | Silver/Black - RSV-L4500U
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AI Verdict
The Rosewill RSV-L4500U is a massive 4U chassis built for home labbers building a high-capacity NAS who don't mind unscrewing cages to swap drives.
This chassis offers massive storage density, fitting 15 drives and an E-ATX board. The lack of a hot-swap backplane and reliance on Molex fans means it requires significant manual labor to maintain and wire.
If you need hot-swap capability, look for the Rosewill RSV-L4412U instead, which includes 12 front-accessible hot-swap bays.
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Pros
- Holds up to 15 3.5-inch hard drives out of the box
- Includes 8 pre-installed cooling fans (six 120mm, two 80mm)
- Fits 12-inch x 13-inch E-ATX motherboards and standard PS2 power supplies
- Heavy-duty 1.0mm SGCC sheet metal construction prevents drive vibration
Cons
- All 8 included fans use outdated 4-pin Molex connectors instead of PWM
- No hot-swap backplane — you must unscrew and slide out the entire 5-drive cage to replace one drive
- Rack rails are sold separately and mounting holes are often misaligned by 1/3U
- Chassis measures slightly taller than a true 7.0-inch 4U, causing scraping if stacked tightly
Dimension Scores
Fits 15 3.5-inch drives and E-ATX boards with ample clearance.
Stock Molex fans run at 100% speed continuously and generate significant noise.
Thick 1.0mm steel construction prevents vibration, but the 4U sizing is slightly off.
Massive open space exists, but routing 15 SATA cables and bulky Molex daisy-chains gets messy fast.
Best For
- Unraid or TrueNAS home server builds using standard consumer motherboards
- Data hoarders needing 15 drive bays in a single enclosure
- Users planning to replace stock fans with aftermarket PWM options
Not Recommended For
- Enterprise environments requiring hot-swappable drive bays
- Tightly packed server racks where millimeter-perfect 4U spacing is required
Watch Out For
- Molex fan power — the 8 included fans daisy-chain via Molex, meaning they run at 100% speed constantly and cannot be controlled by your motherboard.
- Missing rack rails — you have to buy the Rosewill RSV-R28LX rails separately, and users report the mounting holes do not align perfectly with standard racks.
- Tedious drive maintenance — accessing a failed hard drive requires opening the top panel, removing two screws, and pulling out a cage containing five drives.
- Slightly oversized frame — the metal chassis is a fraction of an inch taller than standard 4U, which destroys the paint on adjacent servers if you force it into a full rack.
Full Specifications
| ASIN | B01JBG0LW0 |
| Brand | Rosewill |
| Color | Silver |
| Series | RSV-L4500U |
| Material | Aluminum |
| Case Type | Tower |
| Model Name | RSV-L4500U |
| Item Weight | 31.1 pounds |
| Manufacturer | Rosewill |
| Cooling Method | Air |
| Item model number | RSV-L4500U |
| Product Dimensions | 31 x 23 x 11 inches |
| Item Dimensions LxWxH | 31 x 23 x 11 inches |
| Number of USB 2.0 Ports | 1 |
| Number of USB 3.0 Ports | 2 |
| Motherboard Compatability | Extended ATX |
| Power Supply Mounting Type | Rear Mount |
| Recommended Uses For Product | Business |
What Buyers Say
The sheer capacity of 15 drive bays makes this a staple in the home lab community, but it requires DIY patience. The biggest headache buyers report is the stock cooling setup, as the eight included fans rely on short, daisy-chained Molex connectors that run at full blast. Drive maintenance is another major chore since you have to pull out an entire five-drive cage just to swap a single dead disk. Rack mounting can also be frustrating, with multiple users noting the chassis is just a hair taller than a true 4U, causing it to scrape against other servers. The heavy-duty steel construction and massive internal clearance still make it a top pick for custom NAS builds.
“It's a heavy metal beast that holds 15 drives, but throw the molex fans in the trash and buy a rack shelf because the rails are a nightmare.”
Common Praise
- Fits 15 3.5-inch drive sleds in a single enclosure
- Massive internal clearance easily fits 12x13-inch E-ATX boards and oversized power supplies
- Thick steel construction prevents vibration noise from the hard drives
- Front-to-back airflow path keeps drives well under 40°C
Common Complaints
- All 8 stock fans use Molex connectors and cannot be speed-controlled
- Swapping a single hard drive requires removing two screws and pulling out a cage of five drives
- Chassis is slightly taller than standard 4U, making it a tight squeeze in fully populated racks
- Included instructions lack clear guidance for rack mounting
Ownership Tips
- The front door lock is flimsy and mostly just keeps the dust filter in place rather than providing real security.
- You will need custom-length SATA cables to reach the furthest drive cage cleanly.
- The metal edges inside the case are surprisingly smooth, avoiding cuts during installation.
- Replacing the stock fans with Arctic P12s drops the noise floor dramatically while keeping drive temps around 35°C.
Frequently Asked Questions
Does this case come with rackmount rails?
No, the rack rails are sold separately. You will need to purchase the Rosewill RSV-R28LX rail kit or use a heavy-duty rack shelf.
Are the hard drive bays hot-swappable?
No, they are standard internal cages. You have to open the top cover, unscrew the cage, and pull it out to access the drives.
Can I control the speed of the included fans?
No, the 8 pre-installed fans use 4-pin Molex connectors that plug directly into your power supply, so they run at full speed constantly.
Will a standard ATX power supply fit?
Yes, it fits standard ATX (PS2) power supplies with plenty of room to spare for cable management.
Do I need SATA power splitters for 15 drives?
Yes, most standard power supplies do not have 15 SATA power connectors. You will need crimped SATA power splitters to power all the drives.
Can I replace the stock fans with Noctua or Arctic fans?
Yes, the fan wall uses standard 120mm mounts for the front and middle, and 80mm mounts for the rear exhaust.
Buying Guide
When building a massive storage server, your biggest enemies are vibration, heat, and cable clutter. This chassis solves the first two with heavy steel and a wall of fans, but leaves you to deal with the cables. Because there is no backplane, you must manually route 15 SATA data cables and 15 SATA power connections to the front of the case. Plan your power supply purchase carefully, and invest in crimped SATA power splitters to avoid fire hazards.
4U Form Factor
This is the height of the case, measuring about 7 inches. It is tall enough to fit standard desktop power supplies and 120mm fans, unlike 2U cases which require loud 80mm server fans.
15x 3.5-inch HDD Bays
These are internal metal cages, not hot-swap bays. You have to open the hood and use a screwdriver to change a drive.
E-ATX Compatibility
Extended ATX is larger than a standard motherboard. You can buy used dual-CPU server motherboards and they will bolt right in without clearance issues.
Alternatives
If you want to swap drives without opening the case, search for a 4U hot-swap chassis with a SAS backplane. If you just need a standard PC case that holds a lot of drives, look for a full tower case with 10+ HDD bays.
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