Head-to-head · Best Mini-ITX Cases

Jonsbo C6-ITX vs Lian Li A4-H2O

Which is the better buy? Side-by-side on rating, price, strengths, and watch-outs — with the published ratings we averaged to get there.

The short answer

Lian Li A4-H2O comes out ahead by a clear margin (4.0 vs 4.4). The gap is mostly about experienced SFF builders who want the smallest possible case that still fits a triple-slot GPU and 240 mm AIO — read the strengths below before deciding.

Ranked #5 in Best Mini-ITX Cases

Jonsbo C6-ITX

4.0

$65as of May 19

The Jonsbo C6-ITX is the case to buy when you've already decided you don't need a flagship GPU and you want to keep the build under $400 total. The mesh-everywhere design and full-ATX PSU support are genuinely useful at this price point, and the carry handle is a nice touch even if it's not built for serious LAN use. The trade-off is the 255 mm GPU clearance — RTX 4060 Ti and similar mid-range cards fit fine, but most RTX 4080/4090 partner cards do not.

Strengths

— Sub-$70 price — the cheapest legitimate option in this round-up
— Mesh side, top, and front panels deliver airflow comparable to cases 2x the price
— Built-in fabric carry handle for casual transport (not as robust as the Hyte Revolt 3's)

Watch-outs

— GPU clearance is capped at 255 mm — won't fit most triple-fan flagship cards
— Less polished build quality than the Cooler Master NR200 or Fractal Design Terra
— No premium materials — function-first design

$65 · Check Price on Amazon Full review →

Higher ratedRanked #3 in Best Mini-ITX Cases

Lian Li A4-H2O

4.4

$156as of May 19

The A4-H2O is what you build when you've decided 11 liters is the goal and you're willing to accept the trade-offs to get there. The sandwich layout mounts the GPU behind the motherboard, the removable front and top open up surprisingly easily for a case this small, and the 240 mm AIO support is the differentiating feature against most cases in this volume class. Cable management is the dealbreaker for some builders — there's almost nothing in the way of dedicated routing. GamersNexus calls cable management the case's main flaw; everything else is praised.

Strengths

— 11 L volume — among the smallest cases that still fit triple-slot GPUs
— Designed around 240 mm AIO water cooling, with removable top bracket for radiator install
— Mesh on all four user-facing panels keeps thermals manageable despite the tight volume

Watch-outs

— Cable management is the most-cited frustration — no dedicated tie-downs or channels
— Limited drive support (no 3.5" bays) by design — NVMe-only builds are expected
— SFX power supply only, and clearance for SFX-L is tight

$156 · Check Price on Amazon Full review →

How they stack up

Jonsbo C6-ITX

The budget pick in this round-up. Loses to every other case here on GPU clearance (255 mm vs 322-335 mm), but undercuts the Cooler Master NR200 on price while offering ATX PSU support and more mesh area. Vs the Hyte Revolt 3, the C6-ITX is the half-price alternative for builders who don't need a serious carry handle.

Lian Li A4-H2O

The A4-H2O is the smallest case in this round-up at 11 L vs the Cooler Master NR200's 18.25 L and Hyte Revolt 3's 18.4 L. Vs the Fractal Design Terra (10.4 L), the A4-H2O trades the Terra's wood-and-aluminum finish for a stronger mesh airflow story and proper 240 mm AIO support. Not the build for first-timers — the Jonsbo C6-ITX and Cooler Master NR200 are both significantly easier to work in.

Specs side-by-side

Spec	Jonsbo C6-ITX	Lian Li A4-H2O
Volume	~14 L	11 L
Motherboard	Mini-ITX, Mini-DTX	Mini-ITX
PSU	ATX (up to 140 mm), SFX	SFX, SFX-L (tight)
Max GPU Length	255 mm	322 mm (triple-slot)
Max CPU Cooler Height	170 mm	55 mm
Material	Steel, mesh panels	Aluminum exterior, SPCC steel interior
Front I/O	USB-C, USB 3.0 Type-A, audio/mic combo	USB-C 3.1, USB-A 3.0, audio
Weight	2.3 kg	—
Radiator Support	—	240 mm AIO (top)

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