From the opening we see that the Rhéobus is quality. The manufacturer even book an additional temperature sensor in case one is defective. The fan cables are designed to accommodate both those three son four (so for PWM fans). BUT: my tower (a antec three andred) has original two fans that do not have a third wire (yellow) which is used to return the fan speed. Therefore, the Rhéobus can not adjust their speed: ventilos are either fully, or they are turned off in this case. So I had to buy two fans. I suspected a little but it was not so clear for future buyers, pay attention to this detail because all the other classic Rhéobus do not have this problem because the speed management is via a potentiometer so no need to know the speed in this case.
