I played with a die yield calculator, and for 2.5 defects/sqcm I got:
81 mm2 (roughly what the Icelake U/Y die is): 133 perfect die for 18.4% yield
225 mm2 (HCC die size? probably being optimistic): 8 perfect die for 3.1% yield
324 mm2 die: 3 perfect die for 1.5% yield
Of course there's no real way to know what the actual defect rate is.
81 mm2 (roughly what the Icelake U/Y die is): 133 perfect die for 18.4% yield
225 mm2 (HCC die size? probably being optimistic): 8 perfect die for 3.1% yield
324 mm2 die: 3 perfect die for 1.5% yield
Of course there's no real way to know what the actual defect rate is.