The IHS or Integrated Heat Spreader is the visible top of a CPU that features the prints for
processor type and manufacturing date. Usually this copper plate is more or less crooked
when the processor leaves the factory and this leads to a bad contact between the CPU and
the cooler. This, again, causes the CPU core temperature to rise with any cooler. This is
the issue that the CPU lapping tries to overcome. In this article we'll show you updated
instructions to lapping your heat spreader.