Well, I pulled my laptop apart last night to have a go at modifying the heatsink, and I can report that with slight bending of the heatsink mounting arm and adding more thermal paste to the top left corner, the results are a really good. Where I was previously getting ~20C difference in temps between the cores, I've managed to bring that down to ~10-12C, and reduced the overall temps too. When I received the laptop I would reach 98C with just OCCT, even with the CPU throttling down to 2.6GHz. With -150mV and all the changes made, it's now sticking to 52-62C average across the cores at the full 3.1GHz. Even with full stress testing both the CPU and GPU it maintains 3.1GHz with temps only reaching just over 90C (GPU only gets to 67C). I'm now happy to keep this unit; no need for a refund.



I'm sure with more tweaking, lapping and liquid metal I could reduce the difference and reduce the temps a lot further (especially given Core 3 only hits a max of 54C), but basically I don't want to push my luck and the results I've achieved are enough for my needs.

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