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Thread: AMD 2017 Financial Analyst Day Discussion

  1. #11
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    Thanks. What happens with CPUs where I assume a Ryzen 5 is just a die that
    will not pass the highest clock frequency tests? Also what happens with die's
    that are not totally functional so they need to be sorted for different products.
    I am just asking how things work in general. In the old days I wrote system go/nogo
    tests. Method was to put the IC in a system and try it. That has changed now right?

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  2. #12
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    Quote Originally Posted by smeyer0028 View Post
    Thanks. What happens with CPUs where I assume a Ryzen 5 is just a die that
    will not pass the highest clock frequency tests? Also what happens with die's
    that are not totally functional so they need to be sorted for different products.
    I am just asking how things work in general. In the old days I wrote system go/nogo
    tests. Method was to put the IC in a system and try it. That has changed now right?
    Ryzen 5 and 7 are indeed the same chip. Every die has 8 physical cores (separated in two blocks, so a 4+4) and 16MB L3 Cache, also configured in a 2x 8MB. A prime die makes a Ryzen 7 CPU (1800X, 1700X and 1700), while a defective die, where 1 to 4 cores are not fully functional, makes a Ryzen 5 CPU (either a 6 or a 4 cores). In case of exceptional high prime yield, AMD could also decide to deactivate some good cores on purpose, in order to feed the Ryzen 5 CPU high demand. Voltage and leakage current, should instead be the way to separate the CPU by frequency range offerings.

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