xilinx fpga Kintex7 xc7k325T pcie Development board with expansion card
Board with heat sink or fan
With PCIe XDMA project
Onboard 9 * 256M DDR3 memory, with 4 Panasonic connectors each capable of expanding up to 80 IO ports, totaling 300+IO ports.

The jtag port on the board has solder joints that can be directly soldered to the downloader or linked to the downloader through a mini USB port.

Provide Vivado breathing lamp lighting
Equipped with SPI flash, it can be solidified.

You can DIY modify and expand the IO output voltage.
It is almost the most cost-effective Xilinx FPGA development board currently available.