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by ageitgey 2859 days ago
This is a great article and I highly respect his opinions.

However, since you are probably eagerly reading this to see how fast the new RTX cards are, so you should know upfront that the numbers he has so far are just estimates based on specs:

> Note that the numbers for the RTX 2080 and RTX 2080 Ti should be taken with a grain of salt since no hard performance numbers existed. I estimated performance according to a roofline model of matrix multiplication and convolution under this hardware together with Tensor Core benchmarks from the V100 and Titan V.

2 comments

I'd guess that the performance could be slightly better than the 1080 scaled by cores/MHz/FLOPS. The reason being that the memory bandwidth is higher on the 2080, and that's hard to model unless the person knows exactly how efficient the kernel is and if it's memory bound.
Plus the architecture improvements. Do we know how many cores per SM? They’ve decoupled int and FP execution units which could give larger increases for certain kernels (although FP heavy deep learning kernels aren’t likely to benefit as much, they will still get address calculation benefits).
I hadn't seen the whitepaper on Turing yet. Where did you see they decoupled them?
The keynote
A great way to turn a listing you can trust enough to use as one of your comparison basis, into a listing made up of imaginary marketing numbers.

I guess the click baiting is needed / the best option, but I hate that's it's what most web resources are like now.

But the article isn't hiding the fact that the numbers are estimates. People are curious how the new cards will stack up, and this article provides the best evaluation of that given the information they have available.
The clock rates, number of CUDA cores, memory size/type etc in the new cards aren't really "imaginary marketing numbers". NVidia could have changed their hardware so they could put bigger numbers on paper without corresponding real world performance gains, but that's a big assumption for you to seemingly take as fact.
No one minds comparing some products as guesses/estimates/extrapolations with some products as being real performance figures. So long as it's clear which products have which type of figure.