The box of this fan claims it have a 90cfm air flow with 2000RPM!! Guys it's totally fake! This fan is 100% copy of CM Sickleflow X!! I have a Cooler Master Sickleflow X which is having 70cfm air flow with 2000RPM!! When I operated both the fans directly from the SMPS molex and also from Motherboard using Full Speed, the CM SF X reaches good speed but this Circle Stay Cool remains dangling around 1500RPM!!
In real life The airflow of the Circle Stay Cool is around 60cfm & speed is about 1600RPM!! In comparison between the two, the CM SF X perform much better!!
Overall both the fans looks similar except branding & performance!!
Guys, if your budget is within ₹450, then go for Circle Stay Cool, otherwise go for Cooler Master Sickleflow X with offline pricing around ₹700/-