Just got the new Kaze Flex 120 Black 1500 RPM - mine spins up to 1646. Got it as a case fan for a new build but decided to compare it to a Noctua A12x25 as the upper fan on a L12 Ghost Edition dual downdraft with an A9x25 fan under the cooler on an Aorus B550 ITX MB with a 4750G APU build with 32GB Ram in a 5.9 liter Yiluka YLK-01 case with no space for other fans. I ran the Blender classroom render and Unigine Valley to stress the entire CPU/GPU of the processor. The temperatures in CPUID HWMonitor after completing the 10 minute render with Unigine Valley also running were identical on all 5 MB sensors, the pkg temp was 1 degree lower on the Kaze Flex, and both NVMe drives had identical temps. The render with the Kaze Flex took an additional 7 seconds to complete. This dual fan setup has counterrotating fans as in the Scythe Fuma II cooler. I then also tested the cooler with the Noctua A12x15 fan that performed slightly worse overall. Both fans had individual MB fan headers & were set to read the CPU temp & could rotate up to their max speed. Below are actual temps in a 21C room.
| Noctua A12x25 | Kaze Flex 120 Black | Noctua A12x15 |
Temp Sensor 0 | 42 | 42 | 45 |
Temp Sensor 1 | 43 | 43 | 45 |
Temp Sensor 2 CPU | 68 | 68 | 72 |
Temp Sensor 3 PCI | 21 | 21 | 21 |
Temp Sensor 4 | 42 | 42 | 45 |
Temp Sensor 5 | 43 | 43 | 46 |
Pkg Temp | 69 | 68 | 72 |
Wattage | 88.99 | 88.96 | 89.01 |
NVMe Top | 45 | 45 | 48 |
NVMe Bottom | 38 | 38 | 41 |
Render Time | / 10:15.21 | / 10:22.51 | / 10:20.16 |
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