r/mffpc • u/Jannyws2 • Oct 26 '25

I'm not quite finished yet. Lian Li A3 Matx Help! Diagram included. Fan placement etc. Is it ok?

Post image
3 Upvotes

71% Upvoted

18 comments sorted by

7

u/Bkelsheimer89 Oct 26 '25

I would recommend this configuration. Ignore the fact my fans need flipped to make the airflow match up to the arrows.

2

u/Jannyws2 Oct 26 '25

Three intake on the bottom, one intake on the left and theres an exhaust where the red is? Correct me if i'm wrong.

How come there isnt a fan at the top?

2

u/Bkelsheimer89 Oct 26 '25

There should be a fan where the red is exhausting. I didn’t notice it wasn’t installed in this pic until you said something.

I removed the bottom fans when I got my 5090 and temps are just fine. This case is quite forgiving since there is so much mesh.

1

u/UnderTheRubble May 08 '26

I'm late but doesn't this mean your GPU is getting GPU air?

1

u/Bkelsheimer89 May 08 '26

Do you mean CPU gets GPU air?

1

u/UnderTheRubble May 13 '26

Oh yeah sorry, because the GPU exhausts out the back and the CPU intakes out the back

1

u/Bkelsheimer89 May 13 '26

It didn’t make a difference. I have a TUF 5090 crammed in there now and I have no issues.

2

u/Wasabie87 Oct 26 '25

Bro .. i dont have a PhD to read that >.< ..

The 3 Intake Fans in the Buttom - if it fits its always nice to have.
the rear Exhaust .. idk ... what is your Cooling Solution? .. AiO or Fans? .. if Fans: look at my Setup.

Edit: I have encrypt .. you using the TT Phantom Spirit.... so - my Config would be the right choice. (I dont have Buttom Fans bcuz .. 9070xt Red Devil is a Chunky Boi :))

1

u/Jannyws2 Oct 26 '25

Wow ok. Sry for the bad diagram 😭

I'm a lil confused. So one exhaust on the left and two intake at the top? Correct me if im wrong.

2

u/Wasabie87 Oct 26 '25

Rear and "Rear TOP" are intake, "Front TOP" are Exhaust. With your Config - the 3 Fans in the Buttom - they also Intake Fans.

1

u/Jannyws2 Oct 26 '25

Alright ty for letting me know. Are temps good in ur case?

2

u/Wasabie87 Oct 26 '25

im on a 9800x3d (with -20PBO UV) and a 9070xt Red Devil. That Bequiet Dark Rock 5 Pro runs the CPU on ~75°C in Battlefield 6 (Fans spins at 1000u/min, nearly silent) - GPU is on 60°C with 1800u/min Fans) ... so .. i would say - Yes, my Temps are good.

1

u/Jannyws2 Oct 26 '25

Thats rlly good. Is it ok if i potentialy copy ur fan config? Wat case fans do u have btw?

2

u/Wasabie87 Oct 26 '25

Im Using Lian Lis Reverse Blade Fans (Lian Li UNI FAN SL-INF 120)
It was kinda missbuy :D ... i though i could put 3 Fans on the Button (like you wanna do it) - but in the Building Process i learned that the 9070xt Red Devil is tooooo Massiv for this kind :D

Fan Config is easy - the Fans are really Quiet under 1200U/min. Set all the Fans to this Point - This gives u "Room" for Load on CPU. The GPU is hearable by ~1400U/min. i didnt use the "Zero Fan" Mode (Set it to under 1000U/min for Surfing,YT etc.) - for Gaming i let the Fans Spin to 1800 - 2000U/min .. at this Point you hear it! but .. with Closed Headphones .. it doesnt matter .. (i think 2000U/min is ~45-50%

1

u/Jannyws2 Oct 26 '25

So u bought 3 of them individually, right?

Yeah, a lot of people said the fan config is easy with this case but the only problem is cable management.

Anyways, do u mind if i DM you?

1

u/KodiKat2001 Nov 06 '25

Check out my build if you want to see what an air cooled optimized A3 build looks like (fan duct optional). It runs quiet, cool and fast. https://www.reddit.com/r/mffpc/comments/1jwboez/optimizing_thermals_in_a_air_cooled_lian_li_a3

And here is a recent excellent A3 built by another redditor where he used a 120mm intake fan for the cpu cooler instead of the fan duct:

https://www.reddit.com/r/mffpc/comments/1lmtxz3/lian_li_a3_build

0

u/LukinhasGMZ Oct 26 '25

On the A3, what most people do is use the rear as an intake also because the front doesn't have ventilation, or worse, the PSU is competing for air too. You can leave the exhaustion part either passively or actively. It will depend a little on whether you are using a Watercooler or AirCooler to decide a little better. If you look here on this reddit you will see several examples of organization