What is better than one liquid AIO cooler? Two liquid AIO coolers. Today it’s time for the Gammaxx L360 V2 and Castle 360RGB V2 coolers. Both are among the top of the range of AIO liquid coolers, both use 360mm radiators and both also feature Anti-Leak technology. However, our standardized noise methodology is generally very strict with AIO coolers. So I’m curious to see how Gammaxx and Castle perform in our stress tests.
Testing methodology
As a test processor and heat generator, I am now using an Intel Core i7-11700K on the ASUS TUF Gaming Z590-Plus WIFI motherboard. The entire setup is mounted on a Streacom BC1 frame with no fans to provide airflow. Acoustic shielding (acoustic foam on OSB boards) is installed around the test setup to eliminate ambient noise.
The Voltcraft SL-100 calibrated noise meter is placed perpendicular to the cooler in a fixed position relative to the motherboard at a distance of approximately 35 cm from the CPU socket. Stress tests are performed using Prime95 with a duration of 30-35 minutes. The coolers are tested at three standardized noise levels (36, 39 and 42 dBA) and finally at maximum speed. The tests are run in two sets according to the heat output of the processor.
The first set of tests is at 125 W, the enforced PL1 limit of the processor. The second set of power consumption is then about 205–210 W (4500 MHz at 1.285 V). However, this second level represents a very high concentration of heat per mm2 due to the small size of the chip itself. Thus, not all coolers can be expected to pass this set of tests at all noise levels. The highest temperature achieved is always recorded at the end of the test.
