I have 5 80cc fans. 1 infront, 1 on top, 2 on the side infront of the hsf and 1 at the back beside the psu and hsf. The psu also has a big fan I don’t know the exact size but bigger than 120cc.
Hehe, haven't seen fan size expressed in cubic centimeters before.
I suggest carefully checking how your fans are circulating air inside your case. To borrow some terminology from automotive engineering as well as HVAC (I'm a BSME btw), the air direction should be crossflow, preferably with hot air exiting the top. Since your PSU has an exhaust fan, you can consider it as part of your overall fan count.
Wrong fan setup can and does cause turbulence inside a case. While turbulence cannot be completely avoided, it is the formation of vortices that cause hot air to recirculate inside the case; this can be the reason for your high temps.You don't need to fill up your case with fans. Proper placement and choice of fans can prevent the formation of vortices; good cable management is also a must. In my case, for ex. I have a 120 mm intake and 80 mm exhaust, a Tt Big Typhoon -previously Tt Beetle- on the cpu and a HEC PSU with dual fans (80 mm exhaust, 120 mm intake). Temps are 43 deg at idle, 49 max at load; and this is with a 3200+ A64. I'm thinking of adding another 80 mm exhaust but at least, temps are still manageable. Peaks temps during the recent summer was 53 deg max with 47-48 idle, no aircon whatsoever.