Changsha (No DIMM) Liquid Cooling Project Report
Customer Requirements Input
Design Parameters |
Requirement |
CPU Specification |
EGS, 385W*2 |
Ambient Temperature (°C) |
35 |
Cooling Fluid |
PG25 or Deionized Water |
Inlet Water Temperature (°C) |
40 |
Flow Rate (LPM) |
2.4Parallel + Series. |
Tcase(℃) |
< ℃(2.4LPM) |
Thermal Resistance (°C/W) |
≤ (2.4LPM,At 2.4 LPM, with Thermal Grease - Momentive 4090, Thickness 0.1mm) |
Flow Resistance (kPa) |
≤ KPa (At 2.4 LPM, including cold plates and pipelines, excluding quick connectors) |
Cold Plate Pressure (bar) |
≥10 |
Material |
Cu |
Detailed design model and simulation model of the cold plate.


Simulated Boundary Conditions (Set According to Working Conditions)
Simulated Boundary Condition |
Working Condition Parameters |
CPU Power | 385 W*2 |
Ambient Temperature (°C) | 35 |
Cooling Fluid | PG25 |
Cold Plate. Inlet Temperature (°C) | 40 |
Flow Rate (LPM) | 2.4(Series Connection) |
Material | Cu |
Heat Source Type | EGS |
Skived Fin Density | Thickness:0.2mm ;Gap:0.3mm & 0.5mm |
Switch CPU Power Consumption | No |
Switch CPU Power Consumption | No |
VR Power Consumption | No |
Simulation Results and Analysis
- Working Condition 1 (2.4 LPM PG25 Inlet Water Temperature 40°C) Power 385W * 2
- Front View Temperature Cloud Diagram

(Bottom Temperature Cloud Diagram)
The maximum internal temperature of the CPU chip is 64.66°C
The temperature difference between the inlet and outlet is 9.39°C.


Simulation Results and Analysis
-CPU Surface Temperature Cloud Diagram

The Upper CPU chip surface temperature Tc has a temperature difference of 2.2°C

The lower CPU chip surface temperature Tc has a temperature difference of 2.5°C.
Simulation Results and Analysis
-The temperature difference between the inlet and outlet is 9.39°C.
-Water Flow Temperature Cloud Diagram


Simulation Results and Analysis
- Working Condition 1 (2.4 LPM PG25 Inlet Water Temperature 40°C) Power 385W * 2
- The pressure drop between the inlet and outlet of the upper cold plate on CPU1 is 4.9 KPa.
- The pressure drop between the inlet and outlet of the lower cold plate on CPU1 is 4.2 KPa.
- The pressure drop between the inlet and outlet of the upper cold plate on CPU0 is 6.4 KPa.
- The pressure drop between the inlet and outlet of the lower cold plate on CPU0 is 5.7 KPa.
- The pressure drop between the inlet and outlet is 22.2 KPa. The actual pressure drop may be higher, requiring experimental verification.

Water Flow Pressure Cloud Diagram
