Product Description

JONSBO D300 M-ATX casing (Black) solves airflow limits in compact builds

Thermal choke and space limits ruin many compact PCs. JONSBO D300 M-ATX casing (Black) targets builders who need airflow, clearance, and structure without bulk. This chassis balances size discipline with hardware freedom. It fits modern components, manages heat paths, and keeps access practical.

Built for the PC Components category and the Casing sub-category, this enclosure aligns with mainstream Motherboard and CPU Cooler choices. It appears across curated shelves at PCB Store, serving builders in Bangladesh who want clean design with measurable capacity.

JONSBO D300 M-ATX casing design and build quality

The frame uses a compact yet tall profile. Dimensions reach 236.4mm wide, 420.9mm high, 460.2mm deep. The silhouette favors vertical clearance while preserving desk footprint. The 4mm tempered glass panel delivers rigidity and scratch resistance.

Black finish stays neutral for workstations or gaming themes. Panel alignment feels deliberate. Edges remain clean. Access panels open without drama. Cable paths sit behind structure, not aesthetics.

Weight supports stability. Net weight sits at 8.28kg. Shipping protection reaches 10.60kg gross. The chassis resists vibration under high fan counts.

JONSBO D300 M-ATX casing motherboard and layout support

This enclosure supports ITX and M-ATX boards. That range suits compact gaming, content rigs, and home offices. Board alignment leaves headroom for taller coolers and longer cards.

Clear internal zoning separates thermals. GPU space remains unobstructed. PSU chamber stays isolated. Storage mounts avoid airflow conflict.

Builders using popular Motherboard sizes gain predictable spacing. Socket access stays clear. Front I/O cables route cleanly without stretching headers.

Storage options inside JONSBO D300 M-ATX casing

Drive flexibility matters in compact frames. This chassis offers layered storage placement.

Rear panel support

• 2 × 2.5-inch SSDs, or
• 1 × 3.5-inch HDD + 1 × 2.5-inch SSD

Bottom support

• 1 × 2.5-inch SSD, or
• 1 × 3.5-inch HDD

This layout suits mixed workloads. SSDs stay near airflow. HDDs stay isolated from heat sources. Tool access remains direct during upgrades.

Cooling capacity and airflow planning

Airflow defines stability. The JONSBO D300 M-ATX casing allows aggressive fan planning across zones.

Fan mounting options

• Top: 3 × 120mm or 2 × 140mm
• Side: 3 × 120mm
• Rear: 1 × 120mm or 1 × 140mm
• Bottom: 1 × 120mm
• PSU compartment: 2 × 120mm or 1 × 140mm

All fan positions remain optional. Builders can tune noise and pressure. Side intake favors GPUs. Top exhaust clears CPU heat. Rear exhaust stabilizes flow.

Water cooling support for JONSBO D300 M-ATX casing

Liquid loops need planning room. This chassis supports radiators where they matter.

• Top plate: 240mm or 360mm
• Rear plate: 120mm or 140mm

That range supports AIO choices for high-TDP CPUs. Radiator clearance avoids motherboard interference. Tube routing stays short and direct.

Builders pairing tower air coolers still benefit. CPU cooler height supports up to 180mm. That clears many high-performance air options within the CPU Cooler category.

Graphics card and PSU compatibility

GPU clearance defines longevity. This case supports graphics cards up to 430mm. That headroom welcomes current and future designs.

Power supply support reaches ATX units up to 200mm. Cable slack remains manageable. PSU airflow stays isolated within its chamber.

Large GPUs and long PSUs can coexist without cable crush. Builders retain flexibility across upgrades.

Front I/O and daily usability

Front access matters. Ports stay current and practical.

• USB 3.2 Gen2 Type-C
• USB 3.0
• Audio
• Mic

The Type-C port supports fast peripherals and storage. Audio jacks remain separate for clarity. Placement avoids accidental contact during desk use.

Performance intent and real-world use cases

This chassis fits several build goals.

• Compact gaming systems with large GPUs
• Creator rigs using liquid cooling
• Office workstations with silent airflow tuning
• Home systems needing mixed SSD and HDD storage

Thermal planning scales with fan count. Noise control improves with fewer fans. The structure supports both extremes.

Builders in Bangladesh often balance size, heat, and availability. This enclosure aligns with that reality at PCB Store, where component compatibility matters more than trends.

Reliability, handling, and ownership confidence

Tempered glass thickness adds safety. Steel internals support load distribution. Mounting points remain reinforced.

No electronic parts exist inside the chassis. Reliability depends on structure and tolerances. This design favors rigidity over ornament.

Packaging weight indicates protective shipping. Panels resist flex during transport and relocation.

Why JONSBO D300 M-ATX casing fits your next build

Space limits no longer force compromise. This enclosure supports long GPUs, tall coolers, and full airflow plans. Storage stays flexible. Cooling paths stay intentional.

Availability through PCB Store in Bangladesh simplifies sourcing. Compatibility with common Motherboard and CPU Cooler categories reduces planning risk.

Builders seeking balance between size and freedom find it here. Stock moves fast for good reasons. Secure it before availability tightens.