Jonsbo X400 Gray ATX PC Case, Back-Connect Desktop Case,MB Auxiliary Air Guidance Cooling System

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💡 How to pick a case
What to look for:
  • Matches your motherboard form factor
  • GPU clearance length for your graphics card
  • CPU cooler height clearance
💰 Airflow matters more than looks. Look for mesh front panels and 3+ included fans
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ProductForm FactorTowerSide PanelMax GPU LengthFans IncludedValuePrice
X400 Gray ATX PC Case, Back-Connect Desktop Case,MB Auxiliary Air Guidance Cooling System Case
X400 Gray ATX PC Case, Back-Connect Desktop Case,MB Auxiliary Air Guidance Cooling System
Jonsbo★★★★4.4
ATX
Mid
No
380mm
—
C
$138.90
Specifications
asinB0G43LL2CL
reviews20
discount7
Form FactorATX
TowerMid
value28
Side PanelNo
RGBNo
ColorGray
USB-CNo
Max GPU Length380mm
Max Cooler170mm
2.5in Bays2
3.5in Bays2
PERFORMANCE
57%
Customer Reviews★★★★★4.8 · 5 reviews
★★★★★Premium Build Quality with Flawless Back-Connect Support
We build a lot of showcase PCs, and the JONSBO X400 in Gray has quickly become one of our top recommendations for a premium ATX chassis. If you are looking for a case that supports the new wave of back-connect motherboards (like BTF or Project Zero), this case executes it flawlessly, allowing for an incredibly clean, zero-cable aesthetic. The Technical Specs & Clearances: Motherboard Support: ATX, Micro-ATX, and Mini-ITX (Fully back-connect compatible). GPU Clearance: A massive 427mm. It will fit any RTX 4090 or 5090 on the market with plenty of room to breathe. Cooling Potential: Unbelievable airflow. It supports up to 13 x 120mm fans and can comfortably house 360mm AIO radiators on the top, bottom, or side. CPU Cooler & PSU: Fits CPU air coolers up to 176mm tall and ATX power supplies up to 180mm. Aside from the specs, we highly recommend this case for its build quality. Weighing in at over 22 lbs empty, the SPCC steel chassis feels incredibly rigid and durable, and the tempered glass panels mate together beautifully without any massive gaps. It’s a heavy-duty, premium canvas for high-end components. 5/5 stars!
Luxvibe PC · 2026-04-26 · via amazon
★★★★★rugged, easy access
Very futuristic looking sturdy, rugged design straightforward assembly panels snap out for easy access
Arthur Dries · 2026-04-15 · via amazon
★★★★★Great 2 chamber PC case!
A really well made 2 chamber PC case with plenty of room for cable management and airflow! The case can comfortably fit a 360 AIO either on the top side or on the rear side. It's very easy to take off panels to work on things or route cables. There is a hidden fan tray above the motherboard to install fans for cooling the VRMs. There is space under the case to install up to 3 fans for more air intake.
Swayam Gowda · 2026-05-05 · via amazon
★★★★★Great case!
Case is super high quality, has button releases for all major panels. Looks amazing, and airflow is great. Temps are around 30 - 40c
Jacob Dalleska · 2026-03-16 · via amazon
★★★★★Beautiful
This case is absolutely beautiful. Cable management can be tricky though.
Nathan L. · 2026-03-02 · via amazon
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Amazon
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$138.90
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Newegg
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Newegg (Open Box)
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VALUE SCORE
C
10.3
Average value
Performance (57%) ÷ Price ($138.90) = 10.3
S ≥28 · A ≥20 · B ≥14 · C ≥8 · D <8
X400 Gray ATX PC Case, Back-Connect Desktop Case,MB Auxiliary Air Guidance Cooling System Case
CONSIDER INSTEAD
SAVE $98.91116% of this product's perf
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