Custom hardware = a*(die space, and hence, yield per wafer times cost of wafer, saved using DMEs and eSRAM + other stuff vs. more CUs for x amount of peak achievable performance) + b*(time saved optimizing performance for 1st party games and more games produced) + c*(additional revenue from extra games with shortened dev time or games that would have otherwise been exclusive from 3rd parties) + d*(cost saved on board, enclosure and thermal solution for less hot die) - e*(NRE above a vanilla design with CPUs + more CUs)