CPU does not create even nearly as much especially not BM with its single threaded where a second core is going to sleep ^^.
The X1600 is the burning factor.
And no, you can't underpower the cooling.
The main problem is more likely that you overpowered the GPU as OSX clocks the X1600 to half clock and not "real clock" to prevent that the temparature within does not go higher than 60°C (which is already critical to the harddisk but thats a different thing)
For gaming you will need to get a notebook targeted at that sector with enough free room to cool the GPU. Alternatively you have to put your MBP on a fan plate or something similar that "sucks out" the heat of it.
Otherwise, force the GPU speed to 50% through ATI Tray Tool or Notebook Hardware Control if you want to prevent the next travel to support due to heat problems.
High performance GPU + 2,xcm thick notebooks just can not work, the GPU is capable to run at 100°C without any problems and normally will run at 70°C ++. At that point, the hull of the notebook is more stressed than in any test apple is doing with it, the mainboard is burnt (most likely the ram banks / ram are suffering first) and the hard disk had a very noisy death long ago.
The X1600 is the burning factor.
And no, you can't underpower the cooling.
The main problem is more likely that you overpowered the GPU as OSX clocks the X1600 to half clock and not "real clock" to prevent that the temparature within does not go higher than 60°C (which is already critical to the harddisk but thats a different thing)
For gaming you will need to get a notebook targeted at that sector with enough free room to cool the GPU. Alternatively you have to put your MBP on a fan plate or something similar that "sucks out" the heat of it.
Otherwise, force the GPU speed to 50% through ATI Tray Tool or Notebook Hardware Control if you want to prevent the next travel to support due to heat problems.
High performance GPU + 2,xcm thick notebooks just can not work, the GPU is capable to run at 100°C without any problems and normally will run at 70°C ++. At that point, the hull of the notebook is more stressed than in any test apple is doing with it, the mainboard is burnt (most likely the ram banks / ram are suffering first) and the hard disk had a very noisy death long ago.