I have spend a fair amount of time to test this Lian Li O11D Evo case with the various fan placement. I will like to share my experience with you.

Credits with thanks
================
Lian Li Official website - https://lian-li.com/
Lian Li O11D Evo - https://lian-li.com/product/o11-dynam...
Lian Li 4090 Compatible List - https://lian-li.com/lian-li-pc-case-4...

SG Gaming Community
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SG Affiliated PC Hub (In Singapore)
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Carousell https://www.carousell.sg/u/CyberCyphe...
Shopee Online https://shopee.sg/cybercypher.compute...
PC Pricelisting in Singapore http://www.cybercyphercomp.com/

Time Stamp
==========
00:00 | Intro
00:00 | The methodology
01:20 | System specs
01:32 | legend on fan location
02:11 | Warning on fan placement
03:36 | Application used with explanation
06:22 | UEFI Configuration
08:03 | 1st test with GPU Horizontally mounted
09:06 | 1st test results with explanation
15:15 | 2nd test with GPU Vertically mounted.
16:18 | 2nd test results with explanation
19:21 | End conclusion