Corsair iCUE H150i ELITE CAPELLIX Liquid CPU Cooler (33 Ultra-Bright CAPELLIX RGB LEDs, Three 120mm ML RGB Series PWM Fans, 400 to 2,400 RPM, Zero RPM Mode, Corsair iCUE Commander CORE Included) Black

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Are these liquid temperatures normal? Or perhaps the 5900x just runs hot and this is a sign that the coolant is doing its job? The Corsair iCUE H150i ELITE CAPELLIX liquid CPU cooler provides extreme performance and flashy RGB light shows. It sports a graceful design using a slender 360mm radiator paired with three 120x25mm magnetic levitation RGB fans. The base uses a split-flow copper cold plate with 128 micro-skived fins per inch. Skiving provides excellent thermal transfer and having such a high density will provide a lot of cooling performance. The issue with AIO coolers, especially premium solutions such as this, is price. They're considerably more expensive than air coolers and even some other PC components. While it is a little pricey, you are getting a very good cooler for even the most powerful processors from AMD and Intel.

NOTE: Your cooler pump head should have thermal paste already applied. If you want to use your own thermal paste, make sure you thoroughly clean the cold plate of the pump head and the integrated heat spreader (IHS) of your processor with isopropyl alcohol and lint-free cloth.over ambient at idle seems too high for me. It seems like you have the radiator as top exhaust. So bottom and side are intake? This seems like too much to be a airflow issue, but take of the large side glass off at idle and see what happens. Intel 1700, Intel 1200, Intel 1150, Intel 1151, Intel 1156, Intel 2011, Intel 2066, AMD AM4, AMD AM5, AMD sTR4

I have similar build as OP. 5900x ryzen 9 with RTX 3090 MSI suprim. At idle I get around 39 deg celsius and just under 50 deg celsius for the pump temp under gaming load. (using the h150i elite cappelix. Is this normal? Fans are QLs and set to default quiet profile. Is performance drastically different if I use the included MLs? With the side panels off and at idle, the coolant temp reaches about 34.5 C (Balanced preset) or 38-39 C (relaxed custom curve). So about 2 C cooler.Instead of fans connecting directly to the pump, we now get an iCUE Commander Core, which not only offers fan and pump speed control but also RGB control for both the pump as well as the eight RGB LEDs in each of the ML120 Series fans that ship in the box. Corsair claims extreme performance, a Zero RPM mode, split flow copper cold plate, a low-noise centrifugal pump, various sized radiators in the series, and is easy to install. The Commander CORE module is similar to Corsair’s Commander Pro, but is focused primarily on the H-series pump management by use of the multi-pin connector. A set of six (6) each PWM and RGB headers adorn each side of the Commander CORE module, which provides enough expansion for a few other Corsair fans or RGB components. Also, setting to a decibel 'value' also isn't entirely accurate and can leave a larger range for operational limits. Example, there might actually be a variation of +/-300 RPM where the measurable difference of a single decibel is seen, but 300 RPM is actually a significant difference in the amount of airflow being moved. 1200 RPM and 1500 RPM actually end up performing quite differently. It becomes difficult to replicate test runs without variables based on decibel levels alone as the same measurement of 35dB for one test can easily fall outside of acceptable deviation.

Support for the iCUE H150i Elite Capellix covers all of the current processors! AM4, sTR4, and sTRX4 are supported out of the box for AMD, while on the Intel side, there are 115X, 1200, and 2011(V3)/2066 support. The last bit in the chart covers the five-year warranty.All ELITE CAPELLIX XT AIOs include pre-applied CORSAIR XTM70 Extreme Performance thermal paste for maximum heat transfer from your high-end processor to the cooler coldplate.