ATI X800 VGA heatsink mod to fit M570RU chipset

In my first work I've adapted an Enzontech CNB-R1 desktop northbridge copper heatsink to substitute the aluminum stock one.

See more here: http://forum.notebookreview.com/sager-clevo/251746-how-change-chipset-heatsink-m57xru.html

At that time I didn't had the necessary resources to accomplish a perfect work(make my own custom heatsink), so the Enzontech as commercial solution, was more like a test. The problem that I've faced with these heatsinks was the very geometrical shape, with no possibility to expand or mod in some way.

In a confined space like the insides of the M570RU, there was not much that could be done, and because the off center location of the NB, and some components nearby(capacitors), any implementation would be like a "MacGuyver" challenge.

So I was on my search for the perfect implementation, and a day faced with an old ATI X800 heatsink. Maybe that could do the trick, thought I.

It was perfect, ~10mm high with large copper fins and plenty of space to mod and adapt. And the best of all, the factory modified top right corner, where some capacitors of the board are located, great less work for me

This was the chosen section to cut:


The base had a screw metal pin and a bump for the X800 core, so lots of lapping job ahead.


After some hours of work, the heatsink was ready. The top right corner was shaped to allow it to fit around the board's capacitors:


Improved the previous steel wire retention to accommodate the extra weight of the larger copper X800 heatsink, maintaining a strong spring effect to force max contact between the copper base and the NB core(sorry bad quality this one):


Here you have some comparisons between the stock aluminum one and the X800 mod:


Final work: