I tried to estimate the cost of a Fermi GPU compared with a Cypress GPU based on the following:
- 40nm process with the same defect rate for both designs (not correct but best guess)
- 334mm² for Cypress, 530mm² for Fermi
- defect rate of 0,001 per mm² (also pur guess), defects evenly spaced, each defect means to scrap a GPU (not correct also, but well its a guess).
And why is Fermi pegged at 530mm2 ? From what's been speculated, it should actually be under 500mm2.