How good is the surface?
The thickness of the film is a bit of a secret, but it ensures an average height of the individual surfaces of 0.1 mm, i.e. around 100 microns. We’ll see why this is ideal in a moment. Depending on the distribution and edge tear-off, the surface may not be completely flat, but it will still press perfectly later. The more viscous a paste is, the more difficult it is to achieve an even surface. I tested it with Arctic MX-6 and Alphacool Apex. They both worked about equally well. But I wouldn’t want to make it any more viscous.
The nice thing about a very high-resolution digital microscope like the VHX-7000 from Keyence is the built-in software, which also recognizes shapes and colors and can therefore separate the surfaces perfectly (highlighted here with a random color) and thus also evaluate them. Based on the actual contact area of the IHS of the CPU, this results in an area percentage for the paste of 42.2%. Countless series of measurements have shown that between 39 and 45% is ideal for this paste thickness. No more and no less.
This ensures that the paste is perfectly distributed when the radiator base is pressed on and does not become too thin or too thick. This is also demonstrated by the very even imprint pattern on the CPU, where even the problem area was well covered.
The opposite side of the cooler base is also without any imperfections. The measurements in the stress test have shown that the quantity is also optimal.
You can find the exact results on the last page, so please turn the page again!
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