The type dimension of the Pc Water And Liquid Cooling System market is divided primarily into closed‑loop (all‑in‑one) units, custom‑loop configurations, hybrid systems, and passive‑cooling adjuncts. Closed‑loop solutions dominate the mass market because they combine pre‑filled radiators, pumps, and reservoirs in a sealed package, offering plug‑and‑play simplicity and lower failure risk; they therefore contribute the largest share of revenue despite lower unit prices. Custom loops, by contrast, are assembled from discrete components—pump, reservoir, tubing, blocks, and radiators—allowing enthusiasts to tailor performance, aesthetics, and coolant capacity; this segment commands higher average selling prices and drives innovation in component materials. Hybrid systems integrate liquid cooling with traditional air‑cooling elements, targeting users seeking incremental thermal gains without full system redesign. Passive adjuncts, such as coolant‑filled heat spreaders, occupy a niche within ultra‑quiet builds. Collectively, these sub‑types shape the overall market size by balancing volume (closed‑loop) against margin (custom and hybrid), a core consideration in Pc Water And Liquid Cooling System segmentation analysis.