Review on BQLZR Purity 15mm x 15mm Laptop Heatsink: Optimal Cooling Solution for Your Device by Brad Schaefer

I had issues with the clamping force of the CPU and GPU on one of my old laptops, resulting in poor distribution and air pockets in the thermal interface material (thermal grease) and higher standby temperatures. With one of the thinner shims I was able to get better clamping and TIM distribution and immediately saw a 3 degree improvement in idle temp and a 5 degree improvement under high load. On the side that comes in contact with the processor chip, you need to apply a thin coat of TIM on both sides of the gasket. You have to be incredibly careful not to let the gasket contact the main circuitry on your board. I cut pieces of tape and placed them on the circuits that the spacer was protruding to be doubly safe. I'm only deducting one star because they're a bit pricey for what they are.