AL01 Open Frame Computer case DIY PC Test Bench
4.4Editor score
Premium steel construction
Supports ATX motherboards
Open air design
In this guide
Open frame PC cases offer unparalleled accessibility and airflow for enthusiasts who prioritize cooling and ease of assembly. These chassis remove traditional enclosures to expose components directly to the air.
We evaluated ten top-rated open frame solutions based on build quality, motherboard compatibility, and cooling potential. Each product was assessed for its ability to support diverse hardware configurations.
Every pick highlights unique strengths like unlimited GPU support or premium materials. Please note that product availability and pricing can change frequently on retailer sites.
Top 3 Picks for Best Open Frame PC Case
DIY Aluminium Pc Open Case Computer Chassis Test Bench
4.6Editor score
Unlimited graphics card support
Universal motherboard compatibility
Water cooling support
Cooler Master MasterFrame 360 Stage Mirror ATX PC Case
4.0Editor score
Mirrored stage display
Massive cooling capability
Open-frame design
Top 10 Best Open Frame PC Case in 2026 Compared
The following table provides a side-by-side comparison of all ten open frame cases to help you identify the best fit for your specific hardware needs and build goals.
ProductsSpecificationsEditor scorePrice
Best Budget
AL01 Open Frame Computer case DIY PC Test Bench
0.8mm SPCC steel
Supports ATX boards
Open airflow design
4.4Editor score
Editor's Choice
DIY Aluminium Pc Open Case Computer Chassis Test Bench
Aluminum construction
Unlimited GPU length
Water cooling support
4.6Editor score
Best Premium
DIY Open Frame PC Chassis Aluminum Computer Case
Aluminum case
Type-C support
ITX compatibility
4.5Editor score
PC Test Bench PC Case Open Air PC Case
Open frame design
ATX MATX support
Tool-free installation
4.1Editor score
PC Test Bench ATX Case Open Frame Computer Case
Zinc coated steel
Portable chassis bracket
Black baking paint
4.1Editor score
TGDGAMER E-ATX Open Chassis PC Test Bench
E-ATX support
No GPU limit
2xSSD 2xHDD
4.4Editor score
TGDGAMER Open Chassis DIY Gaming PC Test Bench
ATX M-ATX ITX
No GPU limit
Wide cooling
4.4Editor score
KEDIERS Open Frame Unique Gaming PC Case
7 PWM ARGB fans
Irregular shape
ATX MATX ITX
4.5Editor score
CORSAIR 4000D RS ARGB Frame Customizable Mid-Tower PC Case
FRAME Modular System
3x ARGB PWM fans
InfiniRail mounting
4.7Editor score
Cooler Master MasterFrame 360 Stage Mirror ATX PC Case
Mirrored stage
Open-frame design
USB 4.0 Gen 2×2
4.0Editor score
1. AL01 Open Frame Computer case DIY PC Test Bench – Best Budget Open Frame PC Case
AL01 Open Frame Computer case DIY PC Test Bench
0.8mm SPCC steel
Supports ATX boards
Open airflow design
The AL01 Open Frame Computer case stands out as an affordable option for builders seeking an open frame PC case. With a 4.4 rating, it offers a robust build using 0.8mm SPCC steel with reinforced edges for stability.
Pros
- Affordable price point
- High structural stability
- Flexible GPU installation
- Standard ATX PSU support
- Wide application scenarios
Cons
- Basic build materials
- Limited cable management
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Its broad motherboard compatibility supports ATX, Micro ATX, and ITX boards within 305*245mm dimensions. The open-air design delivers outstanding heat dissipation making it ideal for overclocking verification and hardware testing.
While it lacks premium finishes, the scratch-resistant black sand grain paint ensures long service life. The extended baseboard option allows for E-ATX dual server motherboards which adds versatility.
This case is perfect for DIY hardware testing or permanent maintenance work. Its balance of durability and cost makes it a top recommendation for budget-conscious enthusiasts.
Enhanced Structural Stability
Folded edge reinforcement and triangular plates improve the overall frame rigidity for long-term use.
Superior Heat Dissipation
Open-air frame design allows unrestricted airflow to keep component temperatures low during intense loads.
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2. DIY Aluminium Pc Open Case Computer Chassis Test Bench – Best Open Frame PC Case for Customization
DIY Aluminium Pc Open Case Computer Chassis Test Bench
Aluminum construction
Unlimited GPU length
Water cooling support
This DIY Aluminium case earns top marks with a 4.6 rating for its versatility. It features an aluminum chassis designed for easy DIY installation which suits users who love to customize their own PC setups.
Pros
- Easy DIY installation
- Unlimited graphics card support
- Universal motherboard compatibility
- Flexible power supply options
- Supports water and air cooling
Cons
- Premium price
- Assembly may require care
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It supports unlimited graphics card length providing flexibility for high-end gaming or workstation builds. Universal motherboard compatibility allows integration with a wide range of setups without constraints.
The flexible power supply options support ATX SFX and 1U formats offering versatility. It supports both water and air cooling for the CPU ensuring optimal temperature management.
Ideal for enthusiasts seeking a modular build platform this chassis delivers exceptional performance. Its ability to accommodate diverse hardware makes it a standout choice for serious builders.
Unlimited GPU Flexibility
Accommodates graphics cards of unlimited length for any high-end GPU setup you desire.
Versatile Power Options
Compatible with multiple power supply formats to suit your specific build needs perfectly.
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3. DIY Open Frame PC Chassis Aluminum Computer Case – Best for Type-C Connectivity
DIY Open Frame PC Chassis Aluminum Computer Case
Aluminum case
Type-C support
ITX compatibility
Rated 4.5 this DIY Open Frame PC chassis offers flexibility for building a custom PC. The aluminum computer case supports ITX motherboards and features excellent cooling capabilities.
Pros
- Flexible custom build
- Unlimited graphics card support
- Supports all motherboard models
- ATX SFX 1U compatible
- Water and air CPU cooler support
Cons
- Limited color options
- No included fans
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It accommodates any graphics card length and supports a wide range of motherboard sizes including ITX MATX ATX and EATX. The open-frame design allows enthusiasts to personalize their setup easily.
Power supply support covers ATX SFX and 1U formats providing convenience. Compatible with both air and water cooling solutions it optimizes heat dissipation for demanding systems.
This chassis is ideal for those who value modern connectivity and cooling efficiency. Its robust design ensures compatibility with almost any build you choose to create.
Modern Connectivity
Features Type-C support to ensure your build is ready for the latest connectivity standards.
Superior Cooling Potential
Open-frame design allows unrestricted airflow to maintain low temperatures under load.
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4. PC Test Bench PC Case Open Air PC Case – Best for Hardware Testing
PC Test Bench PC Case Open Air PC Case
Open frame design
ATX MATX support
Tool-free installation
This PC Test Bench case has a 4.1 rating and supports ATX MATX and ITX motherboards. It features an open frame design allowing easy access to components and superior airflow for better cooling.
Pros
- Supports multiple form factors
- Superior airflow cooling
- Dual use as test bench or display
- Tool-free design
- Dedicated mounting brackets
Cons
- Basic appearance
- Limited cable management
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It functions as both a test bench for hardware testing and a permanent open-air display case solution. The tool-free design enables quick component installation maintenance and modifications without special tools.
Dedicated mounting brackets for motherboard power supply and storage devices ensure stability. Its versatility makes it perfect for X79 and X99 builds where airflow is paramount.
Ideal for technicians or enthusiasts who need rapid component changes. Its open-air configuration delivers efficient cooling for high-performance hardware configurations.
Dual Functionality
Works as both a testing bench and a permanent display case for maximum utility.
Rapid Component Access
Tool-free design enables quick installation and maintenance without needing special tools.
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5. PC Test Bench ATX Case Open Frame Computer Case – Best Durable Steel Build
PC Test Bench ATX Case Open Frame Computer Case
Zinc coated steel
Portable chassis bracket
Black baking paint
With a 4.1 rating this case features zinc coated steel which is sturdy and durable. The upgraded version portable chassis bracket supports installation for ITX MATX and ATX motherboards.
Pros
- Sturdy and durable material
- Upgraded version
- Portable design
- Matches various chassis colors
Cons
- Basic mounting system
- No advanced features
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Coloring using baking paint technology ensures the black style matches various colored chassis devices. The design prioritizes durability and portability for builders who move their test benches often.
It offers a straightforward approach to open-air computing. The metal shell provides protection for your motherboard while maintaining excellent airflow.
This option is best for those who value longevity and simplicity. Its robust build ensures it stands up to regular handling and testing.
Robust Steel Construction
Zinc coated steel material ensures the case is sturdy and durable for long-term use.
Aesthetic Compatibility
Black paint finish can be well matched with various colored chassis devices easily.
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6. TGDGAMER E-ATX Open Chassis PC Test Bench – Best for E-ATX Support
TGDGAMER E-ATX Open Chassis PC Test Bench
E-ATX support
No GPU limit
2xSSD 2xHDD
This TGDGAMER E-ATX chassis has a 4.4 rating and supports E-ATX ATX M-ATX and ITX motherboards. It features wide body heat dissipation with no limit in GPU length.
Pros
- Wide body heat dissipation
- No limit in GPU length
- No limit in CPU cooler height
- Supports E-ATX motherboards
- Standard ATX power supply
Cons
- Basic design
- Limited expansion slots
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No limit in CPU cooler height allows for oversized cooling solutions. It supports standard ATX power supply and 2XSSD/2XHDD storage devices for flexibility.
The open chassis design facilitates easy airflow and hardware changes. It is well-suited for high-performance builds that require extensive motherboard support.
Ideal for workstation users needing large board support. Its simple yet effective design ensures your components stay cool and accessible.
Large Cooler Accommodation
No limit in CPU cooler height allows you to use massive cooling solutions easily.
Broad Board Support
Supports E-ATX motherboards ensuring compatibility with the largest hardware formats.
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7. TGDGAMER Open Chassis DIY Gaming PC Test Bench – Best Value for Gaming
TGDGAMER Open Chassis DIY Gaming PC Test Bench
ATX M-ATX ITX
No GPU limit
Wide cooling
Rated 4.4 this DIY Gaming PC Test Bench supports ATX M-ATX and ITX. It features wide cooling capabilities with no limit in GPU length or CPU cooler height.
Pros
- Wide cooling support
- No limit in GPU length
- No limit in CPU cooler height
- Supports ATX M-ATX ITX
- Standard ATX power supply
Cons
- Minimalist design
- No storage mounts included
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It supports standard ATX power supply providing compatibility with most standard components. The open chassis design allows unrestricted airflow for high-performance gaming hardware.
The chassis enables easy DIY installation for users who love to customize their setups. It is perfect for gaming builds that need excellent heat dissipation.
A solid choice for gamers seeking high airflow and GPU flexibility. Its wide cooling design ensures your system stays cool during intense gaming sessions.
Gaming-Focused Design
Wide cooling support ensures high-performance gaming hardware stays cool under load.
High Airflow Potential
Open chassis design allows unrestricted airflow for maximum heat dissipation.
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8. KEDIERS Open Frame Unique Gaming PC Case – Best for RGB Fans
KEDIERS Open Frame Unique Gaming PC Case
7 PWM ARGB fans
Irregular shape
ATX MATX ITX
The C570 gaming case has a 4.5 rating and features 7 PWM ARGB fans pre-installed. Its unique open design can keep the GPU temperature continuously low.
Pros
- 7 PWM ARGB fans pre-installed
- Unique open design
- Tempered glass panels
- SYNC RGB control
- Remarkable expansion
Cons
- Requires motherboard sync
- Red color specific
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It is equipped with 2 tempered glass panels allowing clear views of RGB lighting and components. Fans can be controlled by computer software via a simple +5V ARGB motherboard header.
The case supports ATX Micro-ATX and Mini-ITX motherboards. The irregular shape and thick metal frame offer a creative look for gaming setups.
Ideal for builders wanting high-performance cooling and easy lighting control. It creates a good gaming atmosphere with synchronized lighting and max airflow.
Superior Cooling and Lighting
Pre-installed 7 PWM ARGB fans keep GPU temperatures low and lighting synchronized.
Creative Aesthetic
Unique irregular shape and tempered glass panels create a visually appealing build.
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9. CORSAIR 4000D RS ARGB Frame Customizable Mid-Tower PC Case – Best Modular System
CORSAIR 4000D RS ARGB Frame Customizable Mid-Tower PC Case
FRAME Modular System
3x ARGB PWM fans
InfiniRail mounting
With a 4.7 rating this case features the revolutionary FRAME system giving new meaning to customization. You can upgrade the motherboard tray to billet aluminum or swap out the front I/O panel.
Pros
- Revolutionary FRAME system
- 3x CORSAIR RS ARGB PWM Fans
- InfiniRail mounting system
- Clean Lines or Turbo Cooled
- 3D Y-Pattern Airflow Panel
Cons
- Higher price point
- Complex to configure fully
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It comes with 3x CORSAIR RS ARGB PWM Fans pre-installed and supports daisy-chainable 4-pin PWM connections. The CORSAIR InfiniRail Fan Mounting System offers unmatched flexibility in fan configuration.
The internal side panel can be used as a cable cover for clean cable management or removed to mount fans to the side. The steel front panel features a Y-pattern for minimal restriction.
Ideal for those who want a case that grows with their needs. Its modular nature ensures you can adapt the case as your hardware requirements change.
Modular Customization
The revolutionary FRAME system allows you to upgrade the motherboard tray and front I/O panel.
Advanced Airflow
3D Y-Pattern Airflow Panel provides a low-obstruction path for cool air to enter.
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10. Cooler Master MasterFrame 360 Stage Mirror ATX PC Case – Best for Showcases
Cooler Master MasterFrame 360 Stage Mirror ATX PC Case
Mirrored stage
Open-frame design
USB 4.0 Gen 2×2
This MasterFrame 360 has a 4.0 rating and features a distinctive front-facing mirrored platform. It reflects your components and collectibles from every angle creating a unique 360-degree showcase effect.
Pros
- Front Mirrored Stage
- Massive Cooling Capability
- Open-Frame Design for Creative Freedom
- Wide Component Compatibility
- Next-Gen Front I/O Connectivity
Cons
- Requires careful setup
- Large footprint
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It supports fan sizes from 120mm to 200mm with space for up to twelve 120mm fans. The open-frame layout allows flexible placement of hardware figures and accessories for creators.
Wide Component Compatibility supports Mini-ITX Micro-ATX and ATX motherboards including ATX BTF layouts. It accommodates GPUs up to 430mm and PSUs up to 210mm.
Next-Gen Front I/O Connectivity features USB 4.0 Gen 2×2 Type-C up to 20Gbps. This case is perfect for creators collectors and themed builds requiring maximum cooling.
Creative Freedom
Unrestricted open-frame layout allows flexible placement of hardware and accessories.
Future-Ready Connectivity
USB 4.0 Gen 2×2 Type-C provides future-ready high-speed connectivity.
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Buying Guide – How to Choose the Best Open Frame PC Case
Choosing the right open frame PC case requires attention to build quality motherboard support and cooling capabilities. This guide breaks down the essential factors to ensure you find a match for your needs.
Build Material and Durability
Open frame cases are often made from steel or aluminum. Aluminum offers lighter weight and better heat dissipation but may be less rigid than steel. Look for reinforced edges or triangular plates for stability.
Prioritize cases with premium construction and scratch-resistant finishes to ensure longevity.
Motherboard Compatibility
Ensure the case supports your motherboard form factor such as ATX Micro ATX or ITX. Some cases support E-ATX which is critical for high-end workstation builds.
Check the supported dimensions to avoid compatibility issues with your chosen board.
Graphics Card Support
Open frames often allow unlimited GPU length which is vital for high-end gaming. Verify if there are any physical restrictions on width or mounting options.
Unlimited GPU length provides flexibility for future upgrades without needing a new case.
Cooling System Support
Look for support for both air and water cooling. Open designs naturally improve airflow but dedicated mounting options for radiators are a bonus.
Ensure the case supports your preferred cooling method for optimal temperature management.
Power Supply Compatibility
Confirm the case supports your power supply type whether it is ATX SFX or 1U. Flexible power supply options allow for more compact or specialized builds.
Versatile power supply options give you more control over your build configuration.
Expansion and Storage
Check how many SSDs and HDDs the case can accommodate. Some open frames have limited storage mounts which may require adapters or external solutions.
Ensure there is enough storage support for your data requirements.
Assembly and Accessibility
Open frames should offer easy access to components for maintenance. Tool-free designs enable quick installation and modification without specialized tools.
Tool-free installation simplifies the building process and makes maintenance easier.
Aesthetics and Features
Consider features like tempered glass panels RGB fans or unique shapes. Premium models may include advanced connectivity like USB 4.0 for future-proofing.
Look for features that enhance both the visual appeal and functionality of your setup.
How to Use and Care for Your Open Frame PC Case
Start by ensuring your motherboard is properly secured using the dedicated mounting brackets provided. Verify that your power supply and graphics card are installed securely.
Use cable management holes and ties to keep wiring tidy since open frames expose all components. Proper routing prevents accidental contact and maintains a clean look.
Regularly dust your components using compressed air since open frames are more prone to dust accumulation. Keep the area around your PC clean to maintain optimal airflow.
Frequently Asked Questions
Are open frame cases good for gaming?
Yes open frame cases are excellent for gaming because they provide superior airflow which keeps components cool. They also make it easy to access and upgrade hardware like graphics cards.
Do open frame cases protect against dust?
Open frames do not have solid panels so they are more exposed to dust. Regular cleaning is recommended to prevent dust buildup on sensitive components.
What motherboard sizes do open frames support?
Most open frames support ATX Micro ATX and ITX. Some premium models even support E-ATX for large workstation boards.
Are open frames safe for daily use?
Yes open frames are safe for daily use if you avoid touching live components when powered on. Ensure the setup is placed in a secure area to prevent accidental contact.
Do I need fans for an open frame case?
While open frames naturally improve airflow adding fans can help direct air to specific components. Pre-installed fans are common in many premium models.
Can I use water cooling with an open frame?
Yes many open frames support water cooling with dedicated mounting options for radiators and fans. Verify the specific dimensions before buying.
Final Thoughts on Choosing the Best Open Frame PC Case
We reviewed ten top open frame PC cases including budget options like the AL01 and premium choices like the Cooler Master MasterFrame 360.
Prioritize compatibility with your hardware and the level of cooling you need. The best choice depends on your build goals whether testing or daily use.
Always check current product listings for availability and any updates before purchasing to ensure you get the right product for your setup.