cheapest silent case fan ( 80mm/90mm )

[cute.bandar]

my temps are going really high; 90+ @ load . However If I remove the side panel , the max drops to 78C . This suggests that a case fan would really help my temps.
But I am paranoid about extra sound coming from my PC. any suggestion for cheap cheap silent 80mm/90mm case fan ?Also how loud are generic case fans ?

Thanks

 

[pulkitpopli2004]

which cabinet you have?

configuration?

 

[cute.bandar]

generic cabinet.
config:
AMD X2 4000+
1 gb ram
m2n68-am SE2
HD4670 1gb
280W VIp PSU ( I know )

 

[mithun_mrg]

78C if processor temp is still high adding a cheap 80mm case fan won't make much of a difference rather install a Coolermaster Hyper TX3 1.2K
Coolermaster Hyper TX3 CPU Cooler - Model RR-910-HTX3-G1 ― Lynx - The Audio , Electronics And Computer Online Store In India

BTW use Real temp to monitor ur temps