screen turn off and computer still running when playing game..

[Randy Shawn]

my laptop screen turn off when i play games about 10-20 minutes.. thus my idle temperature is around 40-50C for both CPU and GPU.. and when gaming the temp reach around 65-75C around 15 minutes. also i have replace thermal paste and do it correctly... then what is the laptop problem??.. (sry for my bad english) . help me =(

Laptop Spec
Win7 SP1 64bit
Intel i7 3612QM@2.10Ghz
ATI AMD Radeon HD 7670M (Toshiba) 2GB
Toshiba Satellite M840

 

[Mike BD]

Increasing the fans rot./s will be a good idea.
Decreasing every kind of voltage that not affect any of hardware behaviors as well as turning off the battery economy mode.