Test set-up and TIM impressions
This time, the test setup and measurement methodology have remained identical to the last article. Using temperature sensors in the loop before and after the water block, the delta temperature for each individual core can be calculated for each data sample. A differential pressure measuring device reveals the pressure drop at the water block and with a constant speed of 1 or 2 pumps, we can also determine the dependence of cooling performance on the flow rate of a water block.
Details can be found in the previous test article:
The contact surface from cooler to CPU is and remains a decisive factor for modern platforms with high heat density. These days, CPUs are usually flat to concave (once installed in the socket) and water blocks try to compensate for this as best as possible with convexity and contact pressure. The imprint of the thermal paste, which is Alphacool Apex for all tests, is a revealing indicator of this.
On LGA1700 the standard ILM of the mainboard is used (no washermod or frame) and the assembly of the block is mounted according to the manufacturer’s instructions.
Along the entire “north-south” axis of the socket (right to left in the photos), the Core 1 LT creates a uniform contact pressure to the CPU, as can be seen from the uniform imprint pattern of the paste. Only from “West to East”, where the ILM presses on the CPU IHS, a lower pressure and thus a higher layer thickness of the paste can be seen. However, this is okay, as the heat-generating rectangular silicon die of the CPU runs along the other axis.
The concavity of the CPU is known to be lower on AM5 and the impression looks more uniform accordingly. Here, too, a lower contact pressure can be seen in the “east” and “west”, but with a slight shift to one side. However, the latter phenomenon is not uncommon on my AM5 test system, even with other blocks.
All in all, the Core 1 LT impression images look very good.
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