Manli GeForce RTX 4080 Gallardo conversion and assembly tips
You can see why I am measuring this card again from the previous articles. Today, the cryosheet has to hold its own against a good viscous paste, the original paste and the PTM7950. We’ll see how well this works in a moment, because you have to get it on first. And beware, the pad is electrically conductive, which is why I have to make such a fuss! Of course, you first have to remove the paste or PTM7950 without leaving any residue. Cotton buds, fleece and of course isopropanol as well as a lot of feeling are the best companions to avoid damaging the surrounding SMD components and to get everything clean.
This time I made the pad to fit perfectly so that as little of the electrically conductive material as possible protrudes. Nevertheless, there is always a risk that something could slip or peel off, so you have to/should take precautions.
That’s exactly why I made a sufficiently generous sausage of viscous thermal paste around the die, which is also higher than the die and pad. Any old silicone paste from the industrial sector that does not bleed is suitable here. After all, it is only a non-conductive protective layer.
We can see that the sheet can be fixed by pressing it lightly into or through the paste in such a way that the PCB can even be placed upside down on the cooler and screwed back on without having to worry about anything slipping. Let’s call it a safety line made from cheap thermal paste. This prevents ugly short circuits and does not dissolve layers of paint, such as with nail varnish or acrylic glue.
Measurement results and a little surprise
Let’s now compare four different results! The red curve is the glowworm after 6 months, which is already quite borderline and above all loud. The yellow curve shows the KryoSheet. Due to the relatively low contact pressure, this is slightly behind the best pastes, but still miles ahead of the degraded paste. And that was the purpose of the expensive exercise, because the KryoSheet lasts virtually forever and could be safely buried together with the card after its maximum service life without having to re-paste anything.
Now we come to the hotspot! After 6 months, the Gallardo was already at 103 °C instead of 79 °C when it was delivered to the customer. That’s a whopping 34 degrees more! Here, too, we see the almost constant performance, whereby the hotspot with the KryoSheet is on average 5 to 6 K above that of the best pastes to date. So there is no need to mourn the specially designed original paste. The sheet could even overtake a normal paste after just a few months, only the PTM7950 will certainly remain unmatched even after 2 years.
The measured values clearly speak for the sheet and its longevity, or for the phase change pad. You’ll have to decide for yourself which you prefer.
Measurements on an Intel Core i9 13900K at 253 watts
The trend also continues on the CPU. The KryoSheet is around 2.2 degrees behind the Kryonaut, 2.7 degrees behind the Cotsaur XTM70 and 3.3 degrees behind the TF8 from Thermalright. However, the PTM 7950 beats all pastes and clearly sets itself apart with 4.2 degrees. But you also have to be fair, because who plays Cinebench 24/7? Normally, the performance is easily sufficient, especially since the cooler and the CPU are rather borderline. So you could do without the small added value in cooling if you prefer never to re-paste the CPU again. So here the inner Monk will have to choose between benchmark bars and durability. Yes, the pad works perfectly, but it’s not the ultimate either. Miracles happen less and less often, but even normality can please if it is durable enough.
- 1 - Introduction and background information
- 2 - Test methods and equipment
- 3 - The "secrets" of the KryoSheet and material analysis
- 4 - Thermal resistance in theory and practice
- 5 - Thermal condiuctivity in theory and practice
- 6 - Tests with a GeForce RTX 4080 and Core i9-13900K
- 7 - Summary and conclusion
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