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Our Tests

We tested the temperature once a day for 12 days. The results of those measurements are shown in the table below.

Time Room Temp. Core Temp. Temp. Diff.
0 h 12 °C 53 °C 41 °C
4 h 16 °C 57 °C 41 °C
8 h 15 °C 56 °C 41 °C
24 h 12 °C 52 °C 40 °C
2 d 13 °C 56 °C 43 °C
3 d 15 °C 61 °C 46 °C
4 d 14 °C 60 °C 46 °C
5 d 15 °C 62 °C 47 °C
6 d 14 °C 61 °C 47 °C
7 d 14 °C 61 °C 47 °C
8 d 13 °C 61 °C 48 °C
9 d 12 °C 60 °C 48 °C
10 d 14 °C 61 °C 47 °C
12 d 12 °C 59 °C 47 °C

In the following graph, you can see the evolution of the temperature differences over time.

Mayonnaise as thermal compound 

The collected data is very self-consistent, because even with variations in the room temperature, the temperature difference didn’t vary in an unexpected way. When the temperature was reduced, the variation was below the error margin.

The thermal performance was constant in the first two days of the test. At the third day, the performance began to degrade, stabilizing after the fourth day.

Figures 2 and 3 show the CPU and the base of the cooler after the 12-day test. It looks like the copper at the base of the cooler was somewhat oxidized. We managed to clean both surfaces, but it took a soaped sponge to do that.

Mayonnaise as thermal compoundFigure 2: CPU after running on mayonnaise for 12 days

Mayonnaise as thermal compoundFigure 3: Base of the cooler after running on mayonnaise for 12 days

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Rafael Otto Coelho is a physicist with a master’s degree in Education, and is a college professor in Brazil.