GPU matlab test performance worst than CPU - Who knows why?

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marcelo silva
marcelo silva on 30 Sep 2021
Answered: Jason Ross on 30 Sep 2021
I followed this instructions to test and compare performance between GPU e CPU. I have a NVIDIA GeForce RTX 2070 running with matlab R2017b
Somebody has a suggestion about what is wrong? GPU was not properly working ? GPU is really worst than CPU in my case?

Answers (1)

Jason Ross
Jason Ross on 30 Sep 2021
Like other GeForce cards, double precision performance is significantly less than single precision performance. According to this Wikipedia page, GFLOPS for a RTX 2070 doing double precision math max out at 200-250 GFLOPS depending on model and if it's using boost. If you used singles you should be seeing more like 6500-8000. The card used in that example was a K40c, which can do 1430–1680 GFLOPS double precision.
There are similar other charts on Wikipedia for other GPUs that show their performance results.

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