I have a dell studio 1555 notebook with Core2Duo CPU and ATI Radeon GPU. Recently, I noticed that, during idle time, the CPU heat kicks down and the temperature reduces to some room temperature level. But the GPU never gets below some level, even if it remain Unused.
CPU/GPU Temperature and usage graph;
As you can see, the red line is not coming down like yellow. GPU remained in 46 while CPU came below 25.
Here is the image of studio 1555 motherboard;
The heatsink they used is;
Which covers CPU, GPU, 2 GPU memory chips (2 other chips remain untouched by heat sink on the opposite side of motherboard, exactly below these 2 chips) etc.
Why is my GPU temperature not coming down, and is there any way to make it come down?