high temperature problem. manual fan control.

Hello. I've been doing my work with Dell 7560 Precision for a while now. But the device has an overheating problem. The metal case cannot absorb heat. ventilation pores are dysfunctional. I installed Dell Optimizer for fan control, but it didn't have much effect. How can we manually control the fans on this device? I've used alienware before. I could control the fans as I wanted with Alienware Command Center. Can you recommend me a program for manual fan control? thanks.