Jonsbo ATX Back-Connect Mid Tower Alternatives: 6 Similar Picks Compared

How each alternative compares

Thermaltake Versa H21 ATX Mid Tower

The Thermaltake Versa H21 is a standard ATX mid-tower that prioritizes mesh airflow and tool-free assembly. It measures 8.2 by 16.9 by 18.7 inches and weighs 9.3 pounds, making it significantly lighter and more compact than the Jonsbo X400. Unlike the X400, which supports back-connect motherboards and offers 13 fan positions, the Versa H21 focuses on essential ventilation for standard builds. It lacks the X400’s skeletal mecha aesthetic and double-glazed glass panels. You should choose this if you need reliable airflow and easy maintenance without the complexity or bulk of a specialized back-connect chassis. It is a practical choice for users who value function over unique visual design elements.

be quiet! Pure Base 600 ATX Mid Tower

The be quiet! Pure Base 600 is an ATX mid-tower designed for acoustic performance and quiet airflow. It measures 22.4 by 11.3 by 20.4 inches and weighs 16.4 pounds, offering a different footprint compared to the Jonsbo X400. While the X400 emphasizes extensive cooling flexibility with 13 fan positions and AIO support, the Pure Base 600 focuses on minimizing noise. It supports standard ATX motherboards and modular storage. You should pick this if you prioritize silent operation over the X400’s high-density fan mounting options. It gives up the X400’s specialized back-connect motherboard support and unique skeletal design in favor of a quieter, more traditional mid-tower experience for standard ATX builds.

Phanteks Enthoo Pro Full Tower Tempered Glass

The Phanteks Enthoo Pro is a full tower ATX chassis that provides maximum expansion space. It measures 9.25 by 21.1 by 21.7 inches and weighs 24.3 pounds, making it much larger and heavier than the Jonsbo X400 mid-tower. Unlike the X400, which supports up to 427mm GPUs and features a skeletal design, the Enthoo Pro offers a spacious interior for extensive component expansion. It includes tempered glass side panels and RGB lighting options. You should choose this if you need room for multiple GPUs, large custom loops, or numerous drives. It sacrifices the compact mid-tower footprint and specialized back-connect features of the X400 for superior scalability and premium build aesthetics.

Fractal Design Meshify C ATX Mid Tower

The Fractal Design Meshify C is a compact ATX mid-tower that prioritizes airflow in a smaller footprint. It measures 8.35 by 17.8 by 16.1 inches and weighs 13.6 pounds, making it narrower and shorter than the Jonsbo X400. While the X400 offers 13 fan positions and supports back-connect motherboards, the Meshify C focuses on efficient cooling in a compact design. It includes USB 3.0 connectivity and clean cable management. You should pick this if you need a smaller case for efficient cooling without the bulk of the X400. It gives up the X400’s extensive fan mounting options and specialized BTF support for a more streamlined, airflow-focused mid-tower experience.

Zalman S3 Compact ATX Mid-Tower Case

The Zalman S3 is a compact ATX mid-tower designed for smaller GPUs and radiators. It measures 7.44 by 17.8 by 16.2 inches and weighs 8.38 pounds, making it significantly smaller than the Jonsbo X400. Unlike the X400, which supports GPUs up to 427mm and 360mm radiators, the S3 limits GPU length to 330mm and radiator size to 120mm. It supports standard ATX motherboards and 120mm fans. You should choose this if you need a compact case for smaller components. It sacrifices the X400’s large GPU clearance and extensive cooling flexibility for a more portable, space-saving design suitable for builds with smaller graphics cards and coolers.

Zalman T6 ATX Mid-Tower Case

The Zalman T6 is an ATX mid-tower that includes an external 5.25-inch optical drive bay. It measures 16.9 by 14.8 by 7.87 inches and weighs 8 pounds, offering a different form factor compared to the Jonsbo X400. Unlike the X400, which focuses on back-connect motherboards and extensive fan positions, the T6 prioritizes external drive support alongside standard ATX, micro-ATX, or mini-ITX components. It accommodates up to four cooling fans and four storage drives. You should pick this if you need external optical drive access. It gives up the X400’s specialized BTF support and unique aesthetic for a practical, everyday desktop setup with traditional drive bays.

Quick picks

Our 7 picks

1 Best overall

Jonsbo ATX Back-Connect Mid Tower Case

Best for: BTF motherboard builders seeking mecha aesthetics

Motherboard Support

ATX, Micro-ATX

Case Type

Mid Tower

Radiator Support

360mm

Max GPU Length

427mm

Dimensions

18.1 × 12.2 × 18.8 inches

View on Amazon: Jonsbo ATX Back-Connect Mid Tower Case

The Jonsbo X400 is a mid-tower case designed for ATX and Micro-ATX back-connect motherboards. It features a 3D skeletal frame and dual-sided tempered glass with ARGB lighting. The case supports GPUs up to 427mm and offers 13 fan positions for extensive cooling options, including 360mm radiators. Front I/O includes USB 3.2 Gen 2 Type-C. It suits builders seeking a mecha-inspired aesthetic and clean cable management for BTF systems.

Pros

• Supports ATX and Micro-ATX back-connect motherboards for clean internal layouts
• 13 fan positions with support for 360mm radiators on top or side
• Dual-sided tempered glass panels with ARGB lighting effects
• GPU length support up to 427mm for vertical installation

Cons

• Vertical GPU mounting requires separate purchase of a conversion bracket and extension cable
• Tool-free panel design may reduce structural rigidity compared to screw-mounted panels
• Limited drive bay space with only one 2.5 SSD and two 3.5 HDD slots

Good fit if

• You are building with an ATX back-connect motherboard
• You want extensive fan mounting options for high airflow
• You prefer a mecha-inspired aesthetic with visible internal components

Skip if

• You need a standard ATX motherboard without back-connect support
• You require extensive built-in drive bays for multiple hard drives
• You want a compact case with minimal external dimensions

Verdict: The Jonsbo X400 Gray ATX Back-Connect Mid Tower is ideal for builders using BTF motherboards who want a distinctive skeletal design. It offers robust cooling flexibility but requires extra parts for vertical GPU mounting.

2 Best budget

Thermaltake Versa H21 ATX Mid Tower

Best for: Standard ATX builds needing mesh airflow

Motherboard Support

ATX

Case Type

Mid Tower

Dimensions

18.7 × 8.2 × 16.9 inches

Weight

9.3 pounds

View on Amazon: Thermaltake Versa H21 ATX Mid Tower

The Thermaltake Versa H21 is a black ATX mid tower chassis built for gamers who need reliable airflow. It features a perforated metal mesh on the front and top panels to maximize heat dissipation. The design includes heighten foot-stands to enhance air intake. You get tool-free installation and optimized ventilation for standard ATX motherboards and long graphics cards. It also offers convenient USB 3.0 and audio connectivity on the top panel.

Pros

• Perforated mesh front and top panels for rapid air intake
• Tool-free installation for easier assembly
• Pre-mounted holes support ATX motherboards and long graphics cards
• Top I/O includes USB 3.0 and audio jacks

Cons

• No pre-installed case fans listed in specifications
• Back-panel cable management is not explicitly detailed
• Standard ATX support only, no E-ATX mention

Good fit if

• You want a budget-friendly case with strong passive airflow
• You prefer tool-free installation for quick builds
• You use standard ATX motherboards and need front access to USB 3.0

Skip if

• You require pre-installed fans for immediate cooling
• You need support for larger E-ATX motherboards
• You prefer a back-connect motherboard design for cleaner cable routing

Verdict: Thermaltake Versa H21 Black ATX Mid Tower provides essential airflow features and tool-free assembly for standard ATX builds. It suits users prioritizing ventilation and ease of use over premium cable management or pre-installed cooling.

3 Also great

be quiet! Pure Base 600 ATX Mid Tower

Best for: Quiet ATX builds with large radiators

Motherboard Support

ATX

Case Type

Midi Tower

Included Fans

2x be quiet! Pure Wings 2

Radiator Support

Up to 360mm

Use

Gaming

Dimensions

20.4 × 22.4 × 11.3 inches

View on Amazon: be quiet! Pure Base 600 ATX Mid Tower

The be quiet! Pure Base 600 is a black ATX mid tower designed for quiet operation and flexible cooling. It includes two pre-installed Pure Wings 2 fans and supports radiators up to 360mm on the front, top, and rear. An adjustable top cover adds ventilation options. This case suits builders who prioritize acoustic comfort and modular interior space for high-performance components.

Pros

• Supports radiators up to 360mm on front, top, and rear
• Includes two pre-installed Pure Wings 2 fans
• Adjustable top cover for enhanced airflow options
• Removable ODD cage and repositionable HDD slots

Cons

• Heavier build at 16.4 pounds
• Standard ATX mid tower dimensions may not fit small desks
• No mention of cable management sleeves or included RGB controllers

Good fit if

• You need extensive liquid cooling support for large radiators
• You want pre-installed fans for immediate quiet operation
• You prefer a non-windowed, solid black design

Skip if

• You require a compact ITX or micro-ATX form factor
• You need a case with a tempered glass side panel
• You are looking for a lightweight portable build

Verdict: be quiet! Pure Base 600 Black ATX Case offers robust cooling flexibility and quiet airflow for standard ATX builds. It fits users who value acoustic performance and modular storage options over visual flair.

4 Best premium

Phanteks Enthoo Pro Full Tower Tempered Glass

Best for: builders needing maximum expansion space

Case Type

Full Tower

Side Panel

Tempered Glass

Motherboard Support

ATX

Lighting

RGB

Dimensions

21.7 × 9.25 × 21.1 inches

Weight

24.3 pounds

View on Amazon: Phanteks Enthoo Pro Full Tower Tempered Glass

The Phanteks Enthoo Pro is a full tower ATX chassis with a black finish and tempered glass side panel. It measures 21.7 inches in length and weighs 24.3 pounds. The case includes integrated RGB lighting and front ports for USB 3.0 and USB-C Gen 2. This large build suits users needing extensive expansion space and premium materials.

Pros

• Full tower size for maximum component compatibility
• Tempered glass side panel for visibility
• Integrated RGB lighting and front USB-C Gen 2 port
• Brushed aluminum look with clean interior design

Cons

• Full tower dimensions require a large desk or floor space
• Heavy at 24.3 pounds, making it difficult to move
• No mention of pre-installed case fans

Good fit if

• You need a full tower for extensive hardware expansion
• You want a premium brushed aluminum aesthetic
• You prefer a large tempered glass side panel

Skip if

• You have limited desk space for a large chassis
• You prefer a compact mid tower form factor
• You want a lightweight case for easy transport

Verdict: Phanteks Enthoo Pro Full Tower ATX is a heavy, spacious chassis for builders who prioritize expansion room and a premium look over portability.

5 Best usb 3.0

Fractal Design Meshify C ATX Mid Tower

Best for: Compact ATX builds prioritizing airflow

Motherboard Support

ATX

Case Type

Mid Tower

Included Fans

2x 120mm

Connectivity

USB 3.0

Dimensions

16.1 × 8.35 × 17.8 inches

Weight

13.6 pounds

View on Amazon: Fractal Design Meshify C ATX Mid Tower

The Fractal Design Meshify C is a compact mid-tower case supporting ATX motherboards. It includes two 120mm pre-installed fans and features a mesh front panel for high airflow. The design offers a full-length power supply shroud and 35mm of cable management space. This case suits builders who want efficient cooling in a smaller footprint without sacrificing drive options.

Pros

• Supports ATX motherboards in a mid-tower form factor
• Includes two 120mm pre-installed fans for cooling
• Mesh front panel maximizes air intake
• 35mm of cable management space behind the motherboard plate

Cons

• Smaller internal volume than standard mid-towers
• Only two fans included at startup
• No side panel window listed in specifications

Good fit if

• You need a compact case for an ATX build
• You prioritize airflow over glass aesthetics
• You want pre-installed fans for immediate cooling

Skip if

• You require extensive side-panel window visibility
• You need more than two pre-installed fans
• You prefer a larger full-tower chassis

Verdict: Fractal Design Meshify C Mid Tower delivers strong airflow in a compact ATX chassis, making it ideal for users who value efficient cooling and clean cable management in a smaller footprint.

6 Also great

Zalman S3 Compact ATX Mid-Tower Case

Best for: Compact builds with smaller GPUs

Motherboard Support

ATX

Case Type

Mid-Tower

Side Panel

Acrylic

Included Fans

3x 120mm

Radiator Support

120mm

Max GPU Length

330mm

View on Amazon: Zalman S3 Compact ATX Mid-Tower Case

The Zalman S3 is a compact ATX mid-tower case featuring a hairline front panel and dual intake design. It includes three 120mm fans and supports up to eight for optimized cooling. The acrylic side panel offers a clear view of your build. With a maximum GPU length of 330mm and support for 120mm radiators, it suits users seeking a balanced mix of airflow and aesthetic appeal in a smaller footprint.

Pros

• Includes three 120mm pre-installed fans
• Supports up to eight fans for flexible cooling
• Full acrylic side panel for visibility
• Top and bottom dust filters for maintenance

Cons

• Max GPU length is 330mm, limiting large cards
• Radiator support is limited to 120mm size
• Acrylic panel may scratch more easily than glass

Good fit if

• You want pre-installed fans for immediate cooling
• You prefer a compact mid-tower footprint
• You like the look of hairline metal finishes

Skip if

• You need to fit a GPU longer than 330mm
• You want to install a 240mm or larger radiator
• You prefer tempered glass over acrylic panels

Verdict: Zalman S3 Compact ATX Mid-Tower is a solid choice for builders who need a compact case with good airflow options but must stay within 330mm GPU and 120mm radiator limits.

7 Also great

Zalman T6 ATX Mid-Tower Case

Best for: builders needing an external optical drive bay

Motherboard Support

ATX, mATX, Mini-ITX

Case Type

Mid-Tower

Side Panel

Mesh

Included Fans

1x 120mm

Use

Gaming

Connectivity

USB 3.0

View on Amazon: Zalman T6 ATX Mid-Tower Case

The Zalman T6 is a steel ATX mid-tower chassis built for standard workstation or gaming hardware. It includes one preinstalled 120mm rear fan, support for up to four fans total, and an external 5.25-inch drive bay. You also get mounts for up to four storage drives, making it a fit if you need optical media support.

Pros

• External 5.25-inch bay accommodates an optical drive
• Preinstalled 120mm rear fan with mounting space for up to four total fans
• Supports ATX, mATX, and mini-ITX motherboard form factors
• Mounts up to four internal drives across 2.5-inch and 3.5-inch slots

Cons

• Incompatible with ATX motherboards that have side-facing SATA ports
• Front panel includes only one USB 3.0 port alongside two USB 2.0 ports
• Includes only one preinstalled fan out of four supported locations

Good fit if

• You need a dedicated external 5.25-inch bay for an optical disc drive
• You use an ATX, mATX, or mini-ITX motherboard with top-facing SATA ports
• You want an 8-pound steel chassis with mesh ventilation on the front and side

Skip if

• You use an ATX motherboard with side-facing SATA connectors
• You require multiple front-panel USB 3.0 ports

Verdict: Zalman T6 ATX Mid Tower with 5.25 Bay fits builders needing external optical drive support alongside standard ATX, micro-ATX, or mini-ITX components. It accommodates up to four cooling fans and four storage drives for everyday desktop setups.

Specifications side by side

Frequently asked questions