Lian Li B4: Micro ATX Just Peaked... | Best All Mesh Small Form Factor PC Build

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#lianli #pcbuild #asuspcdiy - It's time for the A3 to step aside... it's time for a new player to enter! Compact size, oozing with style... it's time for the B4!

Timecodes, though I don't recommend skipping for visual narrative reasons! (Quality headphones or speakers recommended throughout)

00:00 - Goodbye A3
00:54 - Welcome B4
01:29 - Cooling Support
02:35 - AeroDeck Options
03:25 - Motherboard Assembly
05:06 - Lian Li B4 Fan Installation
06:35 - Motherboard & PSU Install
07:28 - Cable Management
08:37 - Graphics Card & Panels
09:27 - Airflow Visualization
09:48 - Cinematics & Desk Setup
11:12 - Final Thoughts & Quirks
12:38 - Bloopers & Outtakes

If there's one thing we can count on Lian Li for it's producing a quality case. The A3 has stood the test of time over the last few years with many build features on the channel, and the B4 already promises to follow suit.

Coming in at 5 litres smaller than the A3, the new B4 certainly feels much more compact that's for sure. With a smaller size comes a more challenging build process, but we enjoyed this aspect. Trying to keep the B4 as small as possible, the all-mesh approach retained the primary footprint whilst keeping the system well ventillated.

If vertical is your preference, the Lian Li B4 makes the process easy, though I'd recommend this orientation more for those seeking liquid cooling as the airflow path would be better!

Final conclusion and temperatures following build hardware list:

Main parts included in the build:
(USA Amazon)

Case (black mesh): https://amzn.to/3QLn6On
Case (black wood): https://amzn.to/4v2aDE6
Case (white wood): https://amzn.to/4w8nJ3r
Aero Deck (black): https://amzn.to/43Xd5kc
Aero Deck (white): https://amzn.to/4f83e0b
CPU: https://amzn.to/4xR9yS7
GPU: https://amzn.to/4xRyDfH
RAM: https://amzn.to/44BrToF
Cooler: Arctic Freezer 36 Black
Fans: https://amzn.to/4eJ68rY
MOBO: TUF Gaming B850M-Plus Wifi 7
PSU: Corsair SF850
Storage: https://amzn.to/4xNaLtw
Thermal Paste: https://amzn.to/3SR1mBb
Screwdriver: https://amzn.to/4ba07TU
Monitor: https://amzn.to/4ba0bmC
Keyboard: https://amzn.to/4eNrc0v
Mouse: https://amzn.to/4f43aPY

Main parts included in the build:
(UK Amazon)

Case: Coming Soon
Aero Deck: Coming Soon
CPU: https://amzn.to/43XdZ04
GPU (alternative): https://amzn.to/4euvriu
RAM: https://amzn.to/4eIR3GN
Cooler: https://amzn.to/4gHcbzC
Fans: https://amzn.to/4eKqYHl
MOBO: https://amzn.to/3R5QbUK
PSU: https://amzn.to/3SJM80Q
Storage: https://amzn.to/44BsWF7
Thermal Paste: https://amzn.to/3SyNvPX
Screwdriver: https://amzn.to/4vzsSBT
Monitor: https://amzn.to/4vxhOoV
Keyboard: https://amzn.to/4apQkJd
Mouse: https://amzn.to/4ezbNSC

As an Amazon Associate, I may earn from qualifying purchases.

What it means for a case to be 'Small Form Factor' is a category to be taken with a pinch of salt in 2026. However, for Micro ATX, the Lian Li B4 truly does feel like a proper small form factor case. With that comes a few compromises, but working within the build limitations opens the door for a very fun assembly process for sure!

Lian Li x Dan Cases B4 has been a real treat to build with. Could you see yourself with the B4 on your desk? Would you go horizontal or vertical? Let's chat in the comments!

Special thanks to @LIANLIHQ for supporting this project.

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Posted by GG in Default Category on June 30 2026 at 12:21 AM  ·  Public

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