DDR4 standard has 16 devices per rank. In DDR3 it is 8 devices per rank.

On Fri, Feb 9, 2018 at 6:12 AM, 조해윤 <chohy2...@gmail.com> wrote:
> Dear, all.
>
> According to below link,
> http://repo.gem5.org/gem5?cmd=changeset;node=17b37f38944a
> DDR4_2400_8x8 uses a 8-bit width device and 8 devices are in a rank.
>
> My doubt is  the below.
> DDR4_2400_8x8 class is overriding DDR4_2400_16x4 class in DRAMCtrl.py
> However, the  devices_per_rank is still 16.
> In my understanding, devices_per_rank should be 8.
> Is there any missing point for my understanding?
>
> Best regards,
> Haeyoon Cho
>
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