Cooling Cooling the Coolermaster

I have just moved my system from my globalwin extreme-xs case (4 x 120mm & 2 x 80mm fans) into my new (secondhand) coolermaster 201 (4 x 80mm fans). I have a xp1600 which is not unlocked running at 1750Mhz 166x10.5

Needless to say there has been some increase in case and cpu temp, from 23sys/44cpu idle & 25sys/51cpu heavy load (gloablwin) - to - 27sys/51cpu idle & 31sys/57cpu heavy load (coolermaster)

The case fans are standard (I believe) and are attached to a fanbus (12v/7v/off), I was wondering if it'd be worth fitting higher powered fans which could be switched between 7v/12v as and when to control noise and tempretaure.

I can't really tell any difference in the current fans noise level between 7v/12v at the moment, would the difference be more noticeable with higher powered fans?

Thanks in advance for the help

 

id say put some more beasty fans in there and yeah the noise level should b more noticable if i could take a sound clip of my 80mm delta screamer on half then full i would but you can hear the diff

 

How loud are those fans on 7v? Are they comparable to a standardish 80mm. They're like a tornado at full speed by all accounts