epá se nao queres gastar mto dinheiro podes sempre aumentar a velocidade da fan,faz isto e testa:
mete os driveres 8.7 e dps faz isto
In Catalyst Control Centre, make sure clock and memory settings are correct and turn on Overdrive
Create a Catalyst Control Centre profile called "fanspeed"
Navigate to C:\Users\UserName\AppData\Local\ATI\ACE\ and you'll find an XML file titled "fanspeed", open the file in Notepad or your preferred editor. The file should resemble the following:
<Feature name="FanSpeedAlgorithm_0">
<Property name="FanSpeedAlgorithm" value="Manual" />
</Feature>
<Feature name="FanSpeedRPMTarget_0">
<Property name="Want" value="0" />
</Feature>
<Feature name="FanSpeedPercentTarget_0">
<Property name="Want" value="65" />
As shown above, change the "FanSpeedAlgorithm" value to Manual and the "FanSpeedPercentTarget" value to 65 (or your preferred fan speed in percentage)
atenção q tens de carregar naquela chavinha está no catalyst senao nao consegues alterar nada,e mudas isso q meti a vermelho e tb tens de meter a mostar as pastas ocultas,espero ter ajudado,cumps