Top Ten IC Growth Categories 2021 The top-10 fastest growing IC segments forecast for this year are shown in Figure 1. Each of the top-10 growing IC product categories is expected to see a double-digit increase in sales, but only the top-five segments are forecast to grow faster than the total IC market, which IC Insights projects will rise 12% this year. Figure 1 DRAM and NAND flash are expected to be the two fastest-growing product segments in 2021 with 18% and 17% sales growth, respectively. Laying claim as the fastest growing IC product segment is familiar territory for the DRAM market. DRAM was also ranked as the fastest-growing IC segment in 2013, 2014, 2017, and 2018.