The MSI MPG X870E CARBON WIFI is the objective winner of this comparison, securing a lead in nine out of thirteen evaluated specifications. Its most significant technical advantage is its VRM phase design, which offers a 133% improvement over the alternative. This superior power delivery architecture positions the MSI board as the more robust option for handling demanding system loads compared to the Gigabyte B660M DS3H DDR4, which only outperformed its competitor in two specific categories.

Users prioritizing high-end power stability and advanced component support should select the MSI MPG X870E CARBON WIFI for their build. Conversely, the Gigabyte B660M DS3H DDR4 is the better choice for those who specifically require a higher quantity of PCIe x1 slots, as it provides a 100% advantage in that area. Your final decision should depend on whether your primary requirement is the enhanced power delivery of the MSI board or the specialized expansion capacity of the Gigabyte model.