Setup and test results …
For our test system we used following configuration:
Intel Core i5 4460 @ 3200 MHz with 0,99 Volt
MSI B85M-E45 Rev. 2.0
2x 4GB DDR3-1600
MSI GeForce GTX960 4GB OC
Cooler Master 500W Silent Pro PSU
Cooler Master RC690 case
Windows 7 Ultimate 64 Bit Service Pack 1
For measurement we used following tools: Prime95 V28.7 and SpeedFan V4.51
Thermal grease: Already applied by Cryorig.
The ambient temperature was at 20°C. The 70mm fan was controlled by PWM signal over Y-cable. The speed could not be readout though.
For silent cooling the Cryorig fans have been fixed to 600rpm. for maximum cooling the fans have been fixed to 2000rpm. Idle testing was done only running Windows and SpeedFan. Stress testing was done by using small-FFT test of Prime95. Energy saving features have not been deactivated in BIOS/UEFI for testing.
Cryorig A40 test results …
In comparison to the boxed cooler of the Intel core i5-4460. The boxed cooler could not be tested in silent mode at high loads, as the temperatures exceed the save operating range quickly.
The pump is permanently audible as a soft buzz in our system, but does not stand out unpleasantly. A case with noise reduction might further reduce this sound.
The fans start to be audible at about 900rpm. At maximum performance the noise is rather unpleasant because of the high speed of 2000 / 3000 (70mm fan) rpm.
As expected the Cryorig A40 is superior to the air coolers tested on this system, only the Scythe Fuma could keep up at cooling capacity. For sure this All-in-one cooler has more capacities to cool overclocked CPUs.
The true innovation lies in the additional fan on top of the pump. Because of that we watched the temperatures measured by sensors on the mainboard. At max load and minimum fan speed the sensor showed 38°C, when the fan was set to max speed the value fell to 34°C.
Cryorig A40 result and general impression …