GhislainG :
rdc85 :
err. i think u might wanna specify what intel cpu and apu that get that number...
(there a whole range of intel and apu)
You are correct. A more powerful CPU will not benefit from Mantle as much as a weaker one:
http://www.guru3d.com/articles_pages/amd_mantle_preview,1.html An i5-540 should see a significant increase.
Instead of me saying it, read the review for yourself.
I am posting the link below.
That being said, the article in summary is basically that mantle improves performance up to 40% on amd cpus from the fx series and apus.
It also improves performance of AMD Graphics Cards.
Lastly, it helps Intel cpus (a range of them are tested) but none of their performance increases over 10%, just under actually.
http://wccftech.com/amd-mantle-api-performance-preview-radeon-r7-260x-radeon-r9-270x-radeon-r9-280x/
Lets not forget that most software isn't optimised for HSA yet either.
Once software uses mantle, HSA and true audio, the real performance of AMD APUs will be visible and be significantly better than they appear now.
Lastly, lets not underestimate true audios benefits because having dedicated hardware for the sound on the APU means that the CPU and GPU componenets will be freed up to do what they do best so software which uses true audio will also increase performance on APUs since the CPU and GPU wont be needed for audio tasks.