The height of the Corsair Vengeance RGB DDR5 RAM modules with 6400 MHz and CAS latency 32 is typically around 44 mm. The be quiet! Dark Rock Pro 5 CPU fan is one of the larger coolers on the market with a height of approx. 162.8 mm. The MSI MAG X870 Tomahawk WIFI is an ATX mainboard with the RAM slots directly under the CPU socket.

Due to the height of the Dark Rock Pro 5, it is very likely that the RAM modules will not simply fit under the mounted fan. In practice, the CPU fan usually has to be removed in order to install or replace the RAM modules safely and correctly, as the cooler protrudes over the RAM slots and blocks access.

To summarise: You must remove the be quiet! Dark Rock Pro 5 CPU fan in order to install or replace the Corsair Vengeance RGB DDR5 RAM modules on the MSI MAG X870 Tomahawk WIFI motherboard. Installation under the mounted fan is not possible due to the height.