35T vs 75T vs 100T DMA Cards: Differences and Selection

For the DMA cards discussed here, 35T, 75T and 100T refer to FPGA models in the AMD/Xilinx Artix-7 family. They are not transfer rates in MB/s or firmware versions. The chips provide different amounts of programmable resources.

An FPGA designation is not the complete identity of a board. Two 75T cards can have different revisions, USB controllers, layouts, connectors and accessories. Compare the actual devices, not only the number in their names.

The table shows one chip specification: logic cell count, as published by AMD. It is an FPGA characteristic, not a benchmark of a finished DMA card, and does not replace the specifications of the board you are considering.

A higher logic cell count does not guarantee a higher data transfer rate. Finished-device performance depends on the complete setup, including the firmware implementation and interfaces. The name 100T alone does not establish that a board is faster than every 75T card.

Use comparable test conditions and check connection stability rather than relying on a single short-lived peak result.

Choose firmware using the supported-board list on the product page. A listing that supports both 75T and 100T does not mean that every supplied file can be written to either chip. The specific file must be prepared for the correct device.

Before ordering, provide the full FPGA marking, card model and board revision. If DNA ID binding is required, send the identifier only through official support. Do not share personalized BIN files publicly or use a file from a different card without confirmation.

Features, preparation time and warranty depend on the selected firmware tier. Those terms cannot be determined from the 35T, 75T or 100T marking on the physical board.

Prepare a short checklist before paying for a card or firmware. If you already own a card, a clear photograph of its markings and connectors can help identify it.

The DATA DISTRICT DMA store has a dedicated Captain DMA 75T listing. Read that device’s page for its specifications and kit contents. This guide’s coverage of 100T does not mean that every 100T model is available from our store.

If you already own a card, proceed to compatibility checks and the relevant installation or flashing guide. If you are choosing between boards, send support links to the actual models together with the details of your setup before buying.