Hello,
Anything that has a foam seal between the cooling pad and laptop will work well as these cooling pads will force air through the laptop base vents, like some from Llano or similar.
But your temperatures, were they always like that from new? Because over time the liquid metal on the CPU eventually gets pushed off the CPU due to the effect of parts expanding and contracting under heat. So as the laptop is used it's thermal efficiency decreases, 3 years without any servicing or replacement to this would mean its likely no longer doing a good job so a cooling pad will generally not help much under these conditions.
