DMA (Direct Memory Access) uses dedicated PCIe hardware to read system memory directly, keeping all processing off the gaming PC. While all DMA cards perform the same core function, higher-tier options like the 75T and 100T provide faster read speeds, support more complex firmware, and handle heavier workloads more smoothly. This results in quicker data updates, improved stability, and a more consistent overall experience, especially when running advanced features or larger configurations.