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iMac Intel 27" EMC 2546 CPU Replacement

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  • Before installing the heat sink, see our thermal paste guide for instructions on cleaning and preparing the thermal surfaces and applying a new layer of thermal compound onto the CPU and GPU dies.

  • For the VRAM chips surrounding the GPU, install thermal pads or a thick thermal paste such as K5-PRO, rather than regular thermal paste.

  • The above-mentioned "thermal surfaces" are as follows:

  • The CPU

  • The GPU

  • The VRAM chips

  • The heat sink plates

  • Note that the heat sink does not need new thermal paste. Clean it, but only apply thermal paste to the other surfaces.

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