Thread: Purism Librem Phone
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Zeta is offline Zeta
2017-10-10 , 20:06
Posts: 339 | Thanked: 1,623 times | Joined on Oct 2013 @ France
#149
Originally Posted by olf View Post
One should not expect too much performance gain by going from a ARM's low-end 32bit core (A9) to their low-end 64bit cores (A53 & A55): This is mostly 32 vs. 64bits, e.g. allowing for 4+ GBytes of RAM.
Even though ARM also designed a class of cores below that (i.e. the very-low-end 32bit A7 and 64bit A35), their midrange cores (32bit: A12 = A17, 64bit: A57 & A73) and especially their high-end cores (32bit: A15, 64bit: A72 & A75) are way faster.
Indeed, but there are not only architecture changes :
only the higher range of iMx6 features the 4 cores, most only have one or two, whereas this mid range iMx8M have 4 cores. I can't find where I read that the iMx6 they where targeting had only 2 cores, I may have dreamed that one...
imx6 are limited to 1.2GHz whereas imx8 go to 1.5GHz.
And the A53 should be more power efficient.

But yeah, as said before, even the iMx8 is weaker than the octo-cores and the like found in Android flagships.

By the way, the higher range of iMx8 exist with 4xA53+2xA72, but is not targeted here. It probably costs a lot more.
 

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