r/mffpc is a subreddit with 61k members. The community frequently discusses build, case, lian li a3, matx, and gpu, and they frequently recommend/review matx case, motherboard, and itx case, and the most common flair used is i built this! (matx), help me please!?, discussion, i built this! (itx), and i built this! (atx).
For PCs that are too small for r/PCMR and the full tower subs, but too big for r/sffpc, welcome to micro form factor PC gang. 20L to 40L cases are welcome. Cross posting welcome. Show us your mini itx, mATX and ATX computer builds.
It doesn’t matter what style. Watercooling with custom loops, air cooling, AMD or Nvidia GPU’s, Intel or AMD CPU’s, SFX or ATX, MSI, EVGA, Gigabyte, Asus, Phanteks, Lian Li, Silverstone, Fractal Design, Cooler Master, Corsair, Inwin, Antec, Thermaltake, EKWB.
Popular Topics in r/mffpc
#1
Build
113 posts
#2
Case
99 posts
#3
Lian Li A3
82 posts
#4
Matx
50 posts
#5
Gpu
36 posts
#6
Looking
33 posts
#7
Looking For
33 posts
#8
Pc
26 posts
#9
Cooling
23 posts
#10
Pc Build
21 posts
Products Discussed in r/mffpc
Matx Case
97 reviews
#1
Jonsbo
4.3★ from 38 reviews
#2
Lian Li
4.0★ from 15 reviews
#3
Ncase
5.0★ from 9 reviews
Motherboard
11 reviews
#1
ASRock
4.3★ from 3 reviews
#2
MSI
5.0★ from 2 reviews
#3
Aorus
4.0★ from 1 review
Itx Case
9 reviews
#1
Jonsbo
4.0★ from 2 reviews
#2
ZZAW
4.0★ from 1 review
#3
AKLLA A6
3.0★ from 1 review
Flair Used in r/mffpc
#1
I built this! (MATX)
: "Spray painting Noctua fans to black - Jonsbo D33"
130 posts
#2
Help me please!?
: "Help me track down which mATX case would be a good donor for this custom project. (ConceptDesign)"
28 posts
#3
Discussion
: "Jonsbo D32 Airflow testing."
16 posts
#4
I built this! (ITX)
: "9950X3D2 / 5090 Astral - Z20 Build"
11 posts
#5
I built this! (ATX)
: "Front cross flow"
6 posts
#6
Somebody built this for me.
: "Lian Li B4"
5 posts
#7
I'm not quite finished yet.
: "Upsized and downsizing"
3 posts
#8
Vendor Post
: "My latest liquid cooled mATX build"
1 post
Member Growth in r/mffpc
Yearly
+18k members(42.2%)
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About
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Last updated: August 1, 2026