CPU die sizes, including the dual-core dies, seem to be mainly sitting between 140-220mm^2, with the AMD dies typically being the most oblong, and the Intel dies being the squarest, although that has changed somewhat with some of the dual-core Intel dies. The most oblong long:short edge ratio seems to be no higher than 1.8:1 to date.
So perhaps a ~180mm^2 die size, with a long:short edged ratio of 1.4:1 would be a suitable middle ground? A 16.0 x 11.5mm die size shape? Just throwing a suggestion out there. Everyone's going to have different opinions on what would be most representative, or what would be the most acceptable "middle ground" unless testers are prepared to provide results on multiple IHS testbeds.
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