Chinese PC case manufacturer — aluminium alloy frames, panoramic glass, and strong value. Best known for the BO400 mid-tower, popular in Singapore gaming builds.
Jonsbo (also sold under the Jonsplus brand) is a Chinese PC case manufacturer known for premium aluminium alloy construction at competitive prices. Their cases combine T6 CNC aluminium alloy frames with tempered glass panels — a combination usually found at higher price points from Taiwanese brands. The BO400 is their most popular model, featuring a dual-chamber layout, panoramic three-sided glass view, and support for rear-connect (back-connect) ATX motherboards.
The Jonsbo BO400 — Key Specs
ATX, Micro-ATX, Mini-ITX. Also supports back-connect (BTF) ATX motherboards.
Up to 435mm — fits all current RTX 40/50 series and RX 7000/9000 cards.
Up to 3x 360mm AIO simultaneously — top, side, and bottom mounting.
ATX PSU up to 200mm. Confirm PSU length before purchasing — longer units will not fit.
Up to 10 fans total. Supports 120mm and 140mm on top, side, bottom, and rear.
Up to 173mm height clearance. Fits most high-end air coolers including Noctua NH-D15.
BO400 vs BO400 CG
Three-sided tempered glass (top, front, side). Metal top cover can be swapped to mesh for improved airflow. Standard aluminium frame with corner pillars.
Pillar-free curved glass design — front pillar replaced with continuous curved glass panel. Panoramic “sea view” showcase effect. Same core specs as the original.
Upgrading components in your Jonsbo BO400? BreakFixNow installs RAM, SSDs, CPUs, PSUs (within 200mm), and coolers. Walk in at Queen St — no appointment needed. See Desktop Upgrade Singapore →
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Upgrading your Jonsbo BO400 build?
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