Here's my O11 Mini build from air to water cooled.

Custom Water Loop:

Case: Lian Li PC-O11 Dynamic Mini

CPU: Ryzen 7 5800x

CPU Cooler: EK-Quantum Velocity D-RGB

Mobo: Asus Rog Strix X570-i

Ram: Vengance LPX 32gb 3600mhz with EKWB monarch heatsink.

GPU: EVGA RTX 3090 FTW3 Ultra

GPU Waterblock: EK-Quantum Vector FTW3 RTX 3080/3090 D-RGB with back plate

PSU: Corsair SF750 Platinum

Storage: Samsung 970 EVO Plus 1TB, Seagate Barracuda 120 SSD 1tb, Samsung 970 EVO 1 TB, Samsung 860 EVO 1tb

Fans: 8 Noctua NF-F12 120mm Chromax and 2 Noctua NF-A12X25

PSU Cables: Cablemod Pro in carbon.

Pump/Reservoir: EK-Quantum Kinetic FLT 120 D5

Fittings:  EK-Quantum Torque 90 degree fittings, EK-Quantum Torque 45 degree fittings, 7mm and 14mm Torque extenders, and Torque 12mm HDC fittings all in black.

Radiator: 240mm Ek-Coolstream classic SE and 2 360mm Ek-Coolstream PE

Coolant: EK-Cryofuel Mystic Fog

Air Cooled:

Case: Lian Li PC-O11 Dynamic Mini

CPU: Ryzen 7 5800x

CPU Cooler: Noctua NH-D15S Chromax

Mobo: Asus Rog Strix X570-i

Ram: G.Skill Trident Z NEO RGB 32gb 3600mhz.

GPU: EVGA RTX 3090 FTW3 Ultra

PSU: Corsair SF750 Platinum

Storage: Samsung 970 EVO Plus 1TB, Seagate Barracuda 120 SSD 1tb, Samsung 970 EVO 1 TB, Samsung 860 EVO 1tb

Fans: 7 Noctua NF-F12 120mm Chromax, 2 Noctua NF-A14 140mm Chromax and 1 Noctua NF-A12X15 120mm Slim Chromax

PSU Cables: Cablemod Pro Modmesh in Carbon.