A few people have modded a Jonsbo case because of lacking airflow and cooling potential, but the company has responded in kind with these larger models:
UMX4 - ATX form factor
Dimensions: 204mm (W) * 426mm (D) * 437mm (H) (38L volume)
Material: Body: 2.0mm Aluminum Magnesium Alloy, Internal Structure :1.0mm SGCC Steel Plate, Side Plate:2.0mm Aluminum
Motherboard: ATX / MATX / ITX (Within 305mm x 245mm)
Drive Bay: 2 * 3.5", 4 * 2.5"
Cooling System: Front: none, Top: 2 x 120mm fan, Back:1 x 120mm fan, Bottom:2 x 120mm fan (optional)
CPU Cooler: up to 162mm
Display Card: up to 310mm
Front I/O: USB3.0 x 2, USB2.0 x 2, Audio x 1, Mic x 1
Power Supply: ATX PSU
Expansion Slot: 7 slots
NET/Gross Weight: 7.15kg / 9.6kg
RM3 - mATX form factor
Dimensions: 215mm (W) * 336mm (D) * 385mm (H) (28L volume)
Material: Internal Structure: 1.0mm SGCC Steel Plate, Front Plate: 4.0mm Aluminum, Side Plates: 5.0mm Tempered Glass, Back/Top/Bottom Plate: 1.5+2.0mm Aluminum
Motherboard: MATX / ITX (Within 245mm x 245mm)
Drive Bay: 2 * 3.5", 3 * 2.5" or 5 * 2.5"
Cooling System: Top: 1 x 140mm fan, Back/Bottom:1 x 120mm fan
CPU Cooler: up to 170mm
Display Card: up to 310mm (up to 285mm if HDD is installed)
Front I/O: USB3.0 x 2, Audio x 1, Mic x 1
Power Supply: ATX PSU
Expansion Slot: 4
NET/Gross Weight: 7.3kg / 9.5kg
While still large and not really SFF-sized, I am pleased to see the cooling potential they now have, especially with the ATX case. I like these designs, I just wished they'd default to SFX-L support.
UMX4 - ATX form factor
Dimensions: 204mm (W) * 426mm (D) * 437mm (H) (38L volume)
Material: Body: 2.0mm Aluminum Magnesium Alloy, Internal Structure :1.0mm SGCC Steel Plate, Side Plate:2.0mm Aluminum
Motherboard: ATX / MATX / ITX (Within 305mm x 245mm)
Drive Bay: 2 * 3.5", 4 * 2.5"
Cooling System: Front: none, Top: 2 x 120mm fan, Back:1 x 120mm fan, Bottom:2 x 120mm fan (optional)
CPU Cooler: up to 162mm
Display Card: up to 310mm
Front I/O: USB3.0 x 2, USB2.0 x 2, Audio x 1, Mic x 1
Power Supply: ATX PSU
Expansion Slot: 7 slots
NET/Gross Weight: 7.15kg / 9.6kg
RM3 - mATX form factor
Dimensions: 215mm (W) * 336mm (D) * 385mm (H) (28L volume)
Material: Internal Structure: 1.0mm SGCC Steel Plate, Front Plate: 4.0mm Aluminum, Side Plates: 5.0mm Tempered Glass, Back/Top/Bottom Plate: 1.5+2.0mm Aluminum
Motherboard: MATX / ITX (Within 245mm x 245mm)
Drive Bay: 2 * 3.5", 3 * 2.5" or 5 * 2.5"
Cooling System: Top: 1 x 140mm fan, Back/Bottom:1 x 120mm fan
CPU Cooler: up to 170mm
Display Card: up to 310mm (up to 285mm if HDD is installed)
Front I/O: USB3.0 x 2, Audio x 1, Mic x 1
Power Supply: ATX PSU
Expansion Slot: 4
NET/Gross Weight: 7.3kg / 9.5kg
While still large and not really SFF-sized, I am pleased to see the cooling potential they now have, especially with the ATX case. I like these designs, I just wished they'd default to SFX-L support.