OS : Arch Linux, KDE Plasma 6, Wayland. Kernel 6.11 (Zen). No dual boot.

CPU : Ryzen 9 5950X.
GPU : AMD RX 6900XT, latest MESA.
RAM : 64GB.
Screens : 1x 3840x2160, 1x 1920x1200.

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Devices

Keyboard : Meletrix Zoom 75 (WS Morandi switches).
Mouse : Logitech MX Master.
Gamepad : Sony DualSense.
VR : Valve Index.

Hardware

CPU : Ryzen 5950X, PBO enabled, FCLK @1900MHz.
GPU : Gigabyte AORUS Radeon RX 6900 XT XTREME WATERFORCE WB 16G.
MB : Asus ROG Crosshair VIII Dark Hero.
RAM : Crucial Ballistix 2x32GB 3600MT/s CL16 (BL2K32G36C16U4BL), overclocked @3800MT/s, not more since my CPU doesn't boot with the Infinity Fabric set to 2000Mhz unfortunately.
Storage : Samsung Nvme 990 Pro 1TB, 980 Pro 2TB.
PSU : Corsair AX1600i.
Monitors : LG E7 55", Dell U2410.
Case : Caselabs SMA8-A (Gunmetal).
Case Fans : 4x Noctua NF-F12 PWM @~800rpm.

Watercooling parts

CPU Waterblock : TechN AM4.
GPU Waterblock : AORUS Waterforce.
Pump : EK Revo XTOP Dual D5 @~1500rpm.
Reservoir : Singularity Computers Protium 150.
Tubing : EK ZMT.
Fittings : Bitspower (Black Sparkle CC3 Ultimate, truckload of them in various shapes) & Koolance (QD3 quick disconnect for the GPU).
Radiators : 2x EK Coolstream XE 480, 1x EK Coolsteam XE 240.
Fans : 20x Noctua NF-A12x25 PWM in push-pull @~500rpm.
Monitoring/Control : Aquaero 6 XT, Quadro, flow rate sensor, Leakshield, all from Aquacomputer.
Liquid : distilled water + a bit of automotive coolant used as biocide.