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How many SM's in full fat TU-102 and TU-104 ?

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16 Oct 2012
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As far as i can see this information hasn't been publically anounced but i'm thinking maybe we have some information to work from.

Nvidia's Maxwell and Pascal architectures have 128 ALUs (aka cuda cores) per Streaming Multiprocessor (SM) group. But what about Turing, does that hold true ?

GP-102 for example has 30SMs for a total of 3840 cuda cores but this was only ever fully released in the Titan Xp, while Titan X(p) and 1080Ti only ever exposed 28SMs.

The image below is from the RTX2080TI page and i belive it represents TU-102. I've highlighted it for clarity but it would seem to show 6 sets of 2x3 units arranged in two blocks on either side of the chip, in theory correlate to 36 SMs in total for TU102 if we are talking 128 ALUs per SM, it's worth noting that i could be out by a factor of 2 and TU-102 might have 72 SMs if it's 64 ALUs per SM as with Volta.
TU102speculation.png


Since we know that RTX2080TI is 4352 cuda cores, that would imply only 34(68) of the possible 36(72) SM's are activated which leaves room for a theoretical 4608 cuda core Titan R card to sit above 2080TI in the product stack.

Unfortunately i can't seem to find a simlar graphic for TU-104 so there's not really enough information to speculate further.

EDIT: As Muon points out below just look at RTX 5000 and 6000, TU-104 = 3072 and TU-102 = 4608 cores.
 
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