Modern AMD & Intel CPUs are designed to run fairly hot without any problems– up to 95 degrees Celsius for AMD Ryzen 7000 CPUs, and up to 100 degrees C for Intel’s Core i9-13900K. While in the past a CPU hitting its peak temperature was cause for concern, enthusiasts are going to have to learn to accept high temperatures as “normal” while running demanding workloads with Raptor Lake and Ryzen 7000 CPUs. While it was fairly easy with previous generations of CPUs for coolers to keep the flagship i9 processor well under TJ max (the maximum temperature a CPU can sustain without throttling) in tough workloads, this is no longer realistically possible with the Core i9-13900K without extreme cooling (or enabling power limits). But it also means you’ll need a case with more clearance, about 2.5 inches when you add the fans.
This is good for cooling by allowing for a larger amount of liquid to be used in the circuit while also increasing the overall cooling surface area. The radiator included with the Liquid Freezer II has high fin density and is extremely thick–1.5 inches or 38mm to be precise. This decreases power consumption and leads to lower noise levels in lighter workloads. Like its fans, the water pump is PWM-controlled and will adjust its speeds. The majority of Liquid Coolers on the market today are based around Asetek designs, but the Liquid Freezer II features a pump which was designed in-house by Arctic, with the goal of quieter operation and higher efficiency. As the CPU block does not interfere with RAM slots, there is full RAM compatibility when using this cooler. Arctic’s Liquid Freezer II incorporates a small fan atop the CPU block, which helps dissipate heat and cool the VRMs surrounding the CPU.
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