I switched my air-cooled PC to a dual independent liquid cooling loop setup recently, with two separate 360 rads and pump+reservoir combos for the CPU and the GPU.
AMD Ryzen 9800X3D with an XSPC RayStorm EDGE water block connected to the top radiator
NVIDIA GeForce RTX 4090 with a Barrow BS-NVG4090-PA water block connected to the side radiator
Asus ROG X670E Extreme motherboard
64 GB DDR5-6000 RAM kit from G-Skill
2x NVMe SSDs (2 TB PCIe 5.0 for boot, 4 TB PCIe 4.0 for primary data)
1x 8 TB SATA SSD for even secondary data
Asus ROG Strix 1000W PSU
Lian Li O11D EVO RGB case
Custom cable extenders, ARGB fans, loop design and build by VIXIA computers