- CPU – 84 Watt (https://www.cpu-world.com/CPUs/Core_i5/Intel-Core%20i5-4590.html )
- GPU – 45Watt (https://www.techpowerup.com/gpu-specs/quadro-k620.c2600 )
- Single Board – it is not going to generate too much power. (It is not used)
- RAM – 3 Watt (https://uk.crucial.com/support/articles-faq-memory/how-much-power-does-memory-use#:~:text=As%20a%20rule%20of%20thumb,the%20voltage%20beyond%20XMP%20settings.)
- Power Supply – 132.50W
- SSD - 4 Watt (https://www.windowscentral.com/samsung-860-evo-review)
= Power Consumption (CPU + GPU + RAM + Power Supply + SSD)
= (84 + 45 + 3 + 132.50 + 4) Watts
= 268.50 Watt
Total Power Consumption for head Node is 268.50 Watt
NOTE: One BTU per hour is the energy needed to heat One Pound of Water to 1°F, for one hour
Multplying Total Power Consumption * 3.4192 (https://www.se.com/uk/en/faqs/FA213115/#:~:text=To%20calculate%20heat%20dissipation%2C%20multiply,is%20equal%20to%20BTU%20%2F%20HR.)
= 268.50 * 3.4192
= Approx. 920 BTU/Hr
Taking into consideration, that only head node is using GPU, the heat dissipation of compute node will be :
= Power Consumption (CPU + RAM + Power Supply + SSD) * 3.4192
= (84 + 3 + 132.50 + 4) * 3.4192
= 223.5 * 3.4192
= 764.2 BTU/hr
- Size: Utilizing four fans of approximately 120mm, the standard dimension for case fans, is the chosen configuration.
- Speed: should be more than 1000 RPM , so thatit can produce required airflow
- Max Airflow: At least. 35 CFM
- Connector: Fans are selected to be compatible with the motherboard's fan headers, featuring a 4-pin connector.
- Noise level: Priority is given to fans with a low noise level to guarantee quieter system operation.
-
Fan used in this project:
Akasa 120mm LED Computer Fan with an airflow of approx. 59 CFM
-
Converting CFM(Cubic Feet Per Minute) to CMH (Cubic Meter Per Hour)
1CFM = 1.699CMH 59 CFM = 59 * 1.699 = 100.241 CMH -
As we are using 4 fans, total CMH will be:
= 4 * 102.241 CMH = 400.964 CMH.Now lets see if the airflow provided by fan is sufficient to dissipate the heat generated by the system effectively.
Airflow (CMH) = Total Heat Dissipiation (BTU/hr) / (ΔT * 1.08)where,∆T = Change in Temperature
Typical change in temperature for this kind of system is 15 to 20⁰C , but as there are in-built fan present for CPU, GPU and Power supply, the change in temperature will be approx. 8 to 10 ⁰C. Therefore, Airflow needed to te system will be :
-
Required Airflow for head node(CMH)
= 920 / 10 * 1.08 = 85.18 CMH. -
Required Airflow for compute node(CMH)
= 764.2 / 10 * 1.08 (for head node) = 70.75 CMH. -
Total Airflow required
= Airflow needed for head node + 4 * (Airflow needed for compute node) = 85.18 + 4 * 70.75 = 85.18 + 283.03 = 368.04 CMH
Therefore, the total airflow required in the system which is 360.04 CMH is less than air flow which is provided by the fan which is 400.964 CMH.
A heat gun was employed to assess the heat dissipation of the entire system under two conditions: with the fan operational and with the fan deactivated. The result of testing is provided in Performance Evaluation Part.