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55nm RV770 & G92b Die Sizes Comparison
Our good friend CJ told us some time ago about a die shrink on the G92 from 65nm to 55nm codenamed G92b and it is evident from the information we gotten yesterday that Nvidia is preparing a shift to 55nm on some of the upcoming mobile GPUs. However, we have yet to find out if there will be a shift to 55nm for the desktop parts.
Assuming G92b has no architecturally changes, it will be 17% smaller than G92 thereby it is cheaper to produce and better yield rate. Assuming the rumored die size of RV770 of 250mm2 from Chiphell is correct, this will put its die size about 1.29 times bigger than RV670. That could due to an increase in the number of stream processors and ROP and other architecturally enhancements that makes the die larger. In comparison, G92b die size is slightly larger than RV770 by about 10%.
Our good friend CJ told us some time ago about a die shrink on the G92 from 65nm to 55nm codenamed G92b and it is evident from the information we gotten yesterday that Nvidia is preparing a shift to 55nm on some of the upcoming mobile GPUs. However, we have yet to find out if there will be a shift to 55nm for the desktop parts.
Assuming G92b has no architecturally changes, it will be 17% smaller than G92 thereby it is cheaper to produce and better yield rate. Assuming the rumored die size of RV770 of 250mm2 from Chiphell is correct, this will put its die size about 1.29 times bigger than RV670. That could due to an increase in the number of stream processors and ROP and other architecturally enhancements that makes the die larger. In comparison, G92b die size is slightly larger than RV770 by about 10%.
