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The challenges of PSUs with DDR5

1. Power Supply Changes Made to DDR5
In the past, the power supply for the memory was directly provided by the motherboard. Take DDR4 as an example, the standard specification for DDR4 memory was 1.2V, which is provided by the motherboard.

However, the power of the new generation DDR5 is powered by PMIC, which is located on the DIMM module instead of the motherboard.

Power Supply Changes Made to DDR5

2. The New PSU Challenges with DDR5.
Due to the new power architecture change of DDR5, the power is directly supplied from the PSU to the PMIC with 5V. If the 5V power is unstable, it may cause an abnormal power supply of the memory and lead to potential system crash. Therefore, maintaining a stable 5V power in any condition has become crucial for those PSUs that are prepared to power the DDR5 memory. To maintain that stable supply of power, we suggest users to utilize power supply units with DC to DC circuit design. Compared to AC to DC circuit (Traditional Magnetic Amplifier Design), DC to DC converter design enjoys higher efficiency ratings and has more stable voltage.


3. The Performance of MSI PSUs.
Based on the power testing with benchmark tool, it can be seen that the MSI’s MPG power supplies face drastic 12V power changes, and 5V(CH2) still maintains stability, which means the PSUs of MSI can ensure the stable operation of DDR5 memory at all times.

However, the power of the new generation DDR5 is powered by PMIC, which is located on the DIMM module instead of the motherboard.

The Performance of MSI PSUs