Nexalus TORQUE SCREWS allow a “tool-less” install of our blocks with consistent and even force applied to the CPU, ensuring optimal TIM performance.
This is achieved by preventing the overtightening of the screws by limiting the maximum torque that can be delivered through the head of the screw. A torque limiting mechanism is located within the head of each screw. This mitigates excessive chip temperatures resulting from incorrect installation of the water block.
During the design, the he ideal torque values for market leading CPUs was first determined for each of Nexalus’ water blocks by investigating the change in CPU operating temperature at full load at various torque values.
The following procedure was followed for this test to optimise the torque levels:
1. Thermal grease (Hydronex) was applied.
2. The Nexalus application card was used to evenly spread the grease on the CPU.
3. Pressure was applied and maintained on the water block and thermal interface until the threads were caught with each of the four fixings.
4. The sequence pattern (1, 2, 3, 4) was followed and the screw was rotated one turn at a time until the set torque value was reached as measured with the torque wrench.
5. Once the set torque value had been reached, the PC was powered on and the average CPU temperature measured at full load.
For full load conditions, the following figure shows that a torque set value of 0.3 Nm is more suitable on the Nexalus TR1 (AMD Threadripper boards) whereas a torque of 0.2 Nm is optimal on the Nexalus X1 (Intel i9 and AM4 boards).
Torque Screw M3.5
Torque Screw M4