Evolution domestic of multichip reconfigurable computer systems: from air to liquid cooling: from air to liquid cooling

In the paper we consider the evolution of design technologies of reconfigurable computer systems based on FPGAs of various families. Five FPGA-based generations of reconfigurable computer systems with high placement density, from Xilinx Virtex-E to modern Virtex UltraScale, are described. We show results of design of high real performance energy-efficient reconfigurable computer systems. The main contribution is a liquid cooling system designed for Virtex UltraScale FPGAs. It provides independent circulation of the cooling liquid in the 19” 3U computational module for cooling of 96-128 FPGA chips that generate 9.6-12.8 kWatt of heat in total. The distinctive features of the designed immersion liquid cooling system are high cooling efficiency with power reserve for the designed perspective FPGA families, resistance to leaks and their consequences, and compatibility with traditional water cooling systems based on industrial chillers.