AL01 Open Frame Computer case DIY PC Test Bench for ATX M-Board,1Pc
4.4Editor score
SPCC steel construction
ATX motherboard support
Unlimited GPU length
In this guide
Open frame PC cases offer unparalleled visibility and airflow for custom builds. They eliminate traditional enclosures to maximize heat dissipation and component access for enthusiasts.
We compared ten leading models based on motherboard support, cooling potential, and construction quality. Our analysis highlights standout features for testing, gaming, and showpiece setups.
Each pick reveals specific strengths for different user needs. Prices and availability change frequently, so verify current stock and deals before purchasing your preferred chassis.
Top 3 Picks for Best Open Frame PC Case
CORSAIR 4000D RS ARGB Frame Customizable Mid-Tower PC Case – Black
4.7Editor score
FRAME modular system
InfiniRail mounting
Pre-installed ARGB fans
Cooler Master MasterFrame 360 Stage Mirror ATX PC Case, Mirror Spotlight
4.0Editor score
360 mirror stage
Massive cooling support
USB 4.0 connectivity
Top 10 Best Open Frame PC Case in 2026 Compared
Explore our detailed side-by-side comparison of ten exceptional open frame cases. We evaluate specifications, compatibility, and unique features to help you find the ideal chassis.
ProductsSpecificationsEditor scorePrice
Best Budget
AL01 Open Frame
SPCC steel build
ATX support
Unlimited GPU
4.4Editor score
Editor's Choice
DIY Aluminium Pc Open Case
Aluminium chassis
Water cooling support
Universal board fit
4.6Editor score
Best Premium
DIY Open Frame PC Chassis
Aluminum case
Type-C support
All board models
4.5Editor score
PC Test Bench PC Case
Test bench style
Tool-free design
X79 compatible
4.1Editor score
PC Test Bench ATX Case
Zinc coated steel
Portable bracket
Baking paint
4.1Editor score
TGDGAMER E-ATX Open Chassis
Wide body design
No GPU limit
2 HDD support
4.4Editor score
TGDGAMER Open Chassis
Gaming test bench
Wide cooling
1 HDD support
4.4Editor score
KEDIERS Open Frame Unique Gaming PC Case
Irregular shape
7 ARGB fans
2 tempered glass
4.5Editor score
CORSAIR 4000D RS ARGB Frame
FRAME system
InfiniRail
3 ARGB fans
4.7Editor score
Cooler Master MasterFrame 360
Mirror stage
12 fan slots
USB 4.0
4.0Editor score
1. AL01 Open Frame – Best Budget Test Bench
AL01 Open Frame
SPCC steel build
ATX support
Unlimited GPU length
Open-air cooling
The AL01 Open Frame Computer Case serves as a robust entry point for DIY builders needing a test bench. It receives solid ratings for its sturdy SPCC steel construction and broad motherboard support. This model delivers exceptional value for hardware testing and maintenance work.
Pros
- Sturdy steel construction
- Supports ATX to ITX
- No GPU size limits
- Affordable entry price
- Good airflow design
Cons
- Basic cable management
- No pre-installed fans
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Its 0.8mm thick steel plate ensures structural stability during intensive overclocking sessions. The open-air frame design maximizes heat dissipation for high-performance components. You can install unlimited graphics card lengths without worrying about chassis restrictions.
While cable management is standard for open frames, the reserved routing holes help keep wiring tidy. The lack of pre-installed fans requires separate purchases but allows custom cooling choices. This trade-off keeps costs low while maintaining flexibility for your build.
Ideal for budget-conscious enthusiasts and technicians who prioritize function over aesthetics. It excels in hardware verification and server cabinet setups. Consider this pick if you need reliable testing capabilities without breaking the bank.
Robust Steel Construction
Upgraded 0.8mm SPCC steel plates with triangular reinforcement provide superior stability for heavy components.
Versatile Motherboard Support
Fits ATX, Micro ATX, and ITX boards within 305x245mm, with options for E-ATX extended bases.
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2. DIY Aluminium Pc Open Case – High Flexibility Chassis
DIY Aluminium Pc Open Case
Aluminium material
Water cooling ready
Unlimited GPU support
ATX SFX PSU
This DIY aluminium chassis offers a sleek alternative to steel test benches with superior thermal conductivity. Its high rating reflects user satisfaction with build flexibility and cooling capabilities. Perfect for custom builds requiring water cooling solutions and varied motherboard sizes.
Pros
- Lightweight aluminium body
- Water cooling compatible
- Universal board fit
- High cooling potential
- Flexible PSU options
Cons
- Requires careful assembly
- Basic included hardware
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The chassis accommodates unlimited graphics card lengths, enabling multi-GPU workstation configurations. Compatible power supplies range from ATX to 1U, offering diverse configuration choices. Its open design supports both air and water CPU cooling setups effortlessly.
Assembly may demand patience due to the DIY nature of the installation process. Basic hardware kits are included but might need upgrades for complex setups. The trade-off lies in gaining maximum customization over out-of-box simplicity.
Targeted at experienced builders who value modularity and thermal performance. Use this case for high-end gaming rigs or server maintenance. It bridges the gap between test benches and permanent display solutions effectively.
Premium Aluminium Build
The lightweight yet sturdy aluminium frame provides excellent heat dissipation and resistance to corrosion over time.
Universal Compatibility
Supports ITX to EATX motherboards with unlimited GPU length options for ultimate component flexibility.
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3. DIY Open Frame PC Chassis – Modern Connectivity Pick
DIY Open Frame PC Chassis
Aluminum chassis
Type-C support
ATX to EATX
Air or water cool
The DIY Open Frame PC Chassis introduces modern connectivity features like Type-C to open-air designs. Rated highly by users, it balances premium aluminium build quality with exceptional cooling capabilities. This model is ideal for personalized custom PC setups needing future-ready I/O.
Pros
- Modern Type-C IO
- Aluminum construction
- Excellent airflow
- Unlimited GPU support
- Multiple PSU formats
Cons
- Assembly complexity
- Price slightly higher
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Its chassis supports all motherboard models including EATX without restrictions on graphics card length. Power supply compatibility extends to ATX, SFX, and 1U formats for versatile configurations. The open frame ensures optimal heat dissipation for demanding CPU cooling solutions.
While offering advanced features, the DIY installation process may require more effort than pre-assembled cases. Pricing is modestly higher than basic steel benches but justified by material quality and IO options. Expect a trade-off in assembly time for superior build results.
Suited for enthusiasts wanting a blend of aesthetics and performance in open builds. Perfect for custom water-cooled systems or minimalist showpiece PCs. Select this case when modern connectivity and premium materials are your priority.
Enhanced IO Panel
Includes Type-C support for faster data transfer and modern peripheral connectivity directly on the frame.
Superior Cooling Design
The open aluminium frame maximizes airflow for both air and water cooling solutions efficiently.
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4. PC Test Bench PC Case – Functional Test Rack
PC Test Bench PC Case
ATX open frame
Tool-free design
Dedicated mounts
X79 compatible
This PC Test Bench case focuses on functionality for hardware enthusiasts needing quick access. It earns ratings for its tool-free design and broad motherboard compatibility including legacy X79 models. Great for technicians testing components or building custom rigs.
Pros
- Tool-free access
- X79 specific support
- Sturdy mounting brackets
- Affordable price
- Simple assembly
Cons
- Basic aesthetics
- Limited storage options
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The open air design ensures superior airflow for cooling during stress tests. Dedicated mounting brackets secure motherboards, power supplies, and storage devices reliably. Its versatility allows use as both a test bench and permanent display case.
Aesthetics are functional rather than flashy, which might not suit showcase-focused builds. Storage options are minimal due to the open frame nature. This trade-off prioritizes accessibility and performance over visual flair and cable management.
Best for hobbyists and professionals who value efficiency and component visibility. Use it for maintenance, overclocking, or legacy system builds. Choose this model if you need a reliable and affordable testing platform.
Effortless Component Access
Tool-free installation enables quick hardware swaps and modifications without needing extra tools or screws.
Broad Compatibility
Supports ATX, MATX, and ITX boards with specific support for X79 and X99 platforms.
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5. PC Test Bench ATX Case – Durable Upgrade Pick
PC Test Bench ATX Case
Zinc coated steel
Portable bracket
Black bake paint
Sturdy durable
The upgraded PC Test Bench ATX Case delivers durability through its zinc coated steel shell. Users appreciate its robust construction and protective black bake paint finish for long-term use. It supports ITX through ATX boards effectively for varied testing needs.
Pros
- Zinc coated protection
- Durable shell
- Portable design
- Bake paint finish
- Good motherboard fit
Cons
- Minimal cooling features
- Basic aesthetics
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The portable chassis bracket design allows easy transport between workstations. Zinc coating provides resistance against corrosion and wear during frequent handling. The open frame ensures components remain accessible for maintenance and upgrades.
Cooling relies on ambient airflow without dedicated fan mounts or airflow channels. The simple aesthetic may not appeal to users seeking elaborate setups. This trade-off prioritizes ruggedness and portability over advanced thermal performance or style.
Ideal for field technicians or mobile build stations requiring reliable hardware support. Use it for on-site testing or workshops where durability is key. Select this case when protection and portability outweigh aesthetic concerns.
Protective Coating
Zinc coating and bake paint technology ensure longevity and resistance to environmental wear over time.
Portable Utility
The upgraded bracket design allows the chassis to be easily moved and set up anywhere.
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6. TGDGAMER E-ATX Open Chassis – Wide Body Thermal Specialist
TGDGAMER E-ATX Open Chassis
Wide body design
No GPU limits
2 HDD support
Standard ATX PSU
The TGDGAMER E-ATX Open Chassis emphasizes heat dissipation with its wide body construction. It receives strong ratings for supporting massive GPUs and E-ATX motherboards without restriction. Perfect for enthusiasts needing room for high-power components.
Pros
- Wide chassis body
- Superior heat dissipation
- E-ATX support
- No height limits
- Flexible expansion
Cons
- Large footprint
- Limited cable tools
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Its wide design accommodates unlimited GPU lengths and CPU cooler heights without hindrance. The chassis supports two hard drives and standard ATX power supplies for balanced builds. Open frame layout ensures direct airflow to all critical hardware.
The large footprint may not fit smaller workspaces easily. Cable management tools are basic, requiring custom solutions for tidy setups. However, these are minor concessions for the exceptional thermal performance and component freedom offered.
Best for hardcore gamers or workstation users prioritizing thermal headroom. Ideal for liquid cooling loops or multi-GPU configurations. Choose this chassis when maximum hardware compatibility is your main goal.
Extended Thermal Space
Wide body design maximizes heat dissipation by preventing component clustering and blocking airflow paths.
Component Freedom
No limits on GPU length or cooler height allow installation of any hardware regardless of size.
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7. TGDGAMER Open Chassis – Gaming Focused Bench
TGDGAMER Open Chassis
Gaming test bench
Wide cooling
1 HDD support
ATX support
This TGDGAMER Open Chassis is tailored for gaming PC builders needing a versatile test bench. It gains solid ratings for wide cooling capabilities and unlimited graphics card support. Great for testing high-end GPUs without chassis limitations.
Pros
- Optimized for gaming
- Wide cooling design
- Unlimited GPU length
- Standard ATX PSU
- Easy access
Cons
- Single HDD option
- Minimal IO features
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Its design supports ATX, M-ATX, and ITX motherboards with standard ATX power supplies. The wide cooling layout ensures consistent temperatures during intensive gaming workloads. Storage options include one HDD slot plus unlimited GPU flexibility.
Only one hard drive slot might limit mass storage builds. IO features are minimal compared to standard cases. These limits are acceptable for testing rigs focused on performance rather than full system setups.
Perfect for gamers and overclockers testing new hardware configurations. Use it for benchmarking or permanent gaming stations. Choose this case when cooling efficiency and GPU freedom are paramount.
Gaming Performance Focus
The chassis layout prioritizes airflow to support high-performance gaming components effectively.
Maximum GPU Fit
Unlimited GPU length support ensures compatibility with the latest oversized graphics cards.
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8. KEDIERS Open Frame – Aesthetic Airflow Design
KEDIERS Open Frame
Irregular shape
7 ARGB fans
2 tempered glass
Max airflow design
The KEDIERS Open Frame case combines unique aesthetics with powerful cooling in one unit. Rated highly for its creative irregular shape and included 7 PWM ARGB fans. Perfect for users wanting showpiece quality with high performance.
Pros
- Unique irregular shape
- 7 pre-installed fans
- Tempered glass panels
- Sync RGB lighting
- Max airflow path
Cons
- Expensive compared to others
- Large overall size
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It features two thick tempered glass panels to display internal lighting clearly. RGB fans sync via motherboard headers without extra controllers. The max airflow design keeps GPU temperatures low during long gaming sessions.
The price is higher than standard test benches due to extra RGB features. Its large footprint demands significant desk space. These are acceptable trade-offs for buyers wanting premium visuals and pre-built lighting.
Ideal for streamers and RGB enthusiasts building visible custom PCs. Use this case for a permanent gaming setup or showpiece. Select it when aesthetics and airflow efficiency matter most.
Pre-Installed RGB Lighting
Seven PWM ARGB fans come pre-installed for instant vibrant lighting and synchronized control via motherboard.
Visual Appeal Panels
Two 4mm tempered glass panels provide clear views of components and lighting without obstruction.
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9. CORSAIR 4000D RS ARGB Frame – Modular Customization Leader
CORSAIR 4000D RS ARGB Frame
FRAME modular system
InfiniRail mounting
3 ARGB fans
Turbo airflow option
This CORSAIR FRAME system redefines customization with modular options for every component. It receives top ratings for InfiniRail mounting and high-performance ARGB fans. Ideal for users needing a case that evolves with their setup.
Pros
- FRAME modularity
- Daisy-chainable fans
- Zero RPM mode
- Cable cover panel
- High airflow design
Cons
- Requires extra parts for mods
- Mid-tower footprint
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The revolutionary FRAME system allows swapping I/O panels or upgrading trays to billet aluminum. Three pre-installed PWM fans support daisy-chain connections with near-silent Zero RPM modes. You can add side fans for turbo cooling or remove covers for cleaner cable routing.
Full modular capabilities require purchasing extra parts separately which adds cost. The standard mid-tower footprint limits extreme hardware sizes. However, the flexibility and build quality justify the price for customizers.
Best for enthusiasts who value adaptability and premium design features. Use it for long-term builds needing future upgrades. Choose this case when modularity and high-quality thermal options are top priorities.
InfiniRail Flexibility
Steel multi-point mounting systems allow fans to slide anywhere along rails for perfect airflow paths.
FRAME Modular System
Swap panels and trays easily to adapt the case to changing hardware needs or moods.
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10. Cooler Master MasterFrame 360 – Ultimate Showpiece Platform
Cooler Master MasterFrame 360
360 mirror stage
12 fan slots
USB 4.0
ATX BTF support
The Cooler Master MasterFrame 360 stands out as a unique showcase for collectibles and hardware. Rated for its distinctive mirrored stage and massive cooling support. Perfect for creators and collectors wanting 360-degree visibility of their builds.
Pros
- 360 mirror display
- Massive cooling slots
- Future-ready USB
- Creative freedom layout
- ATX BTF support
Cons
- High premium price
- Requires precise placement
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Its open-frame layout allows flexible placement of hardware and accessories without restrictions. The front mirrored platform reflects components for a stunning display effect. Cooling capacity supports up to twelve fans and large radiators for extreme setups.
The high price reflects premium materials and unique design elements. Precise component placement is needed to maximize the mirror effect. These trade-offs are acceptable for users prioritizing visual impact and connectivity features.
Best for content creators and collectors building themed display PCs. Use it as a centerpiece for streams or exhibitions. Select this case when uniqueness and massive airflow are critical.
360 Mirror Display
Front-facing mirrored platform reflects your build from every angle for a unique showcase effect.
Next-Gen Connectivity
Features USB 4.0 Type-C ports for future-ready speeds and advanced data transfer capabilities.
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Buying Guide – How to Choose the Best Open Frame PC Case
Selecting an open frame case requires balancing compatibility, cooling, and aesthetics. We outline essential factors to consider before purchasing your ideal test bench or display chassis.
Motherboard Compatibility
Ensure the case supports your specific motherboard form factor such as ATX, Micro ATX, or ITX. Some models offer E-ATX support for server boards or extended bases for dual-socket layouts. Always check maximum dimensions to avoid fitting issues.
Choose a chassis with flexible mounting options to adapt to future upgrades or different board sizes.
Cooling Capabilities
Open frame designs excel at airflow but verify support for fans or radiators if needed. Consider unlimited graphics card length options to accommodate high-end GPUs without restrictions. Check CPU cooler height clearance for large towers or water blocks.
Prioritize cases with wide body designs or specific cooling zones to maximize thermal performance.
Build Material and Durability
Steel frames offer strength and durability while aluminium provides lightweight portability and better thermal conductivity. Look for reinforced edges or zinc coatings to prevent corrosion and structural damage. Baking paint finishes add aesthetic and protective value.
Select materials based on whether you prioritize ruggedness for testing or lightweight for transport.
Power Supply Support
Verify compatibility with your power supply format such as ATX, SFX, or 1U. Some cases allow flexible PSU placement for better cable management or airflow. Ensure reserved routing holes are available for tidy wiring.
Choose a chassis that matches your power needs and allows easy access to connectors.
I/O and Connectivity
Check for modern ports like USB 3.2 or Type-C for future-ready peripheral connections. Some cases include additional USB hubs or HD audio on the front. I/O placement affects accessibility during component testing and maintenance.
Opt for models with versatile ports to simplify your workflow and daily usage.
Storage and Expansion
Open frames often limit drive bays so confirm HDD or SSD support slots. Some models allow external storage solutions or specific mounting brackets. Consider your total storage needs before finalizing your choice.
Select a case that provides enough drive slots or flexibility for external drives.
Aesthetic Features
Display cases may include tempered glass or RGB fans to highlight components. Unique shapes like irregular frames or mirrors create showpiece appeal. Choose based on whether function or visual impact is your priority.
Look for aesthetic elements that align with your personal style or brand identity.
Assembly and Maintenance
Tool-free designs enable quicker hardware swaps and adjustments. Check for dedicated brackets that simplify installation and maintenance tasks. Easy accessibility is critical for frequent testing scenarios.
Prioritize chassis designs that offer straightforward assembly and component access for daily use.
How to Use and Care for Your Open Frame PC Case
Always secure your motherboard to the frame using all provided standoff points to prevent short circuits and ensure stability. Verify that your power supply and GPU are properly mounted before powering on the system.
Regularly dust components using compressed air since open frames collect debris faster than enclosed cases. Avoid direct contact with components while cleaning to prevent accidental damage to sensitive circuits.
Maintain thermal performance by ensuring fan airflow paths remain clear of obstructing cables. Recheck mounting screws periodically to prevent vibrations from loosening hardware over time.
Frequently Asked Questions
Are open frame PC cases safe for daily use?
Open frames are safe for daily use when kept in a dust-controlled environment away from liquids. Ensure all components are securely mounted and protected from accidental physical contact. Many users operate them permanently for testing or display.
Do open cases provide better cooling than standard cases?
Yes, open frames offer superior cooling due to unrestricted airflow around components. Without panels to block air, heat dissipates faster. This makes them ideal for overclocking and high-performance setups.
Can I install multiple GPUs in these cases?
Most open frames support unlimited GPU length allowing multiple cards easily. Check specific chassis clearance and mounting options for multi-GPU configurations. Ideal for workstation or mining setups needing flexibility.
Do I need to buy fans separately for open frames?
Some open frames come with pre-installed fans while others require separate purchases. Verify package contents before buying to understand what cooling components are included. Add fans for optimized airflow if needed.
How do I manage cables without a rear panel?
Use cable ties and clips to route wires through reserved holes in the frame. Keep cables organized near the PSU to minimize clutter and maintain airflow. Some cases offer side panels for temporary cable hiding.
Are open frames suitable for server boards?
Many models support E-ATX and server motherboards with extended bases. Verify dimensions and mounting points match your specific server hardware. Ideal for testing or home server setups.
What should I watch out for when assembling?
Ensure standoffs align with motherboard holes to prevent short circuits. Check all mounting screws are tightened properly to avoid component damage. Follow manufacturer guides for correct installation order.
Can I use an open case for gaming?
Absolutely, open frames provide excellent cooling for gaming builds. They allow easy access for maintenance and upgrades between gaming sessions. Ensure the setup is stable and safe from accidental bumps.
Final Thoughts on Choosing the Best Open Frame PC Case
Our top three picks highlight different strengths from budget durability to premium modularity. The AL01 offers affordable testing while the CORSAIR frame delivers customizable options.
When prioritizing choose based on your specific cooling needs and desired aesthetics. Test benches require sturdy materials and open cases demand airflow flexibility.
Verify current availability and compatibility before purchasing to ensure perfect fit. Prices and stock fluctuate regularly so act quickly on preferred options.