From: Staf Verhaegen <staf@fibraservi.eu>
To: libre-riscv-dev@lists.libre-riscv.org
Subject: Re: [libre-riscv-dev] additional ddr3 interfaces
Date: Wed, 01 Apr 2020 17:19:12 +0200
Message-ID: <9f72940ad53e20b7015c45771177e6dff55ae6ab.camel@fibraservi.eu> (raw)
In-Reply-To: <CAPweEDxnFyjAC65kvkN5nVYoscL2Ks-791q6pWwpx623Pc0KRA@mail.gmail.com>
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Luke Kenneth Casson Leighton schreef op wo 01-04-2020 om 11:10 [+0000]:
> On Wed, Apr 1, 2020 at 1:44 AM Jacob Lifshay <programmerjake@gmail.com> wrote:
> > that would be nice, however the t2080 appears to have a 64-bit memoryinterface along with some really high-speed serdes -- both of which will bemore difficult to achieve.
> > However, if we get the funding required for the open-source custom DDR3interface, we could potentially put two copies on our SoC,
>
> each DDR3/4 RAM interface adds around 0.4 watts per 800mhz clock ratewhich, due to power being a square law, ramps up 1.6 watts by 1600mhz.
Power consumption is linear with frequency and square with voltage (P = f * C * V^2).
For overclocking increasing frequency also likely means you need to increase voltage so you need to increase power consumption more than linear with frequency.
greets,
Staf.
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Thread overview: 35+ messages / expand[flat|nested] mbox.gz Atom feed top
2020-03-29 20:17 [libre-riscv-dev] PPC on Talos and Playstation 3 Immanuel, Yehowshua U
2020-03-29 20:20 ` Immanuel, Yehowshua U
2020-03-29 20:35 ` Jacob Lifshay
2020-03-29 21:01 ` Luke Kenneth Casson Leighton
2020-03-30 6:56 ` Lauri Kasanen
2020-03-30 7:12 ` Jacob Lifshay
2020-03-30 7:32 ` Lauri Kasanen
2020-03-30 7:52 ` Jacob Lifshay
2020-03-30 8:05 ` Lauri Kasanen
2020-03-30 18:07 ` Jacob Lifshay
2020-03-30 18:12 ` Immanuel, Yehowshua U
2020-03-30 18:16 ` Jacob Lifshay
2020-03-30 18:35 ` Immanuel, Yehowshua U
2020-03-30 18:36 ` Immanuel, Yehowshua U
2020-03-30 18:46 ` Luke Kenneth Casson Leighton
2020-03-30 18:57 ` Immanuel, Yehowshua U
2020-03-30 19:09 ` Luke Kenneth Casson Leighton
2020-03-30 19:20 ` Immanuel, Yehowshua U
2020-03-30 19:25 ` Luke Kenneth Casson Leighton
2020-03-30 19:35 ` Immanuel, Yehowshua U
2020-03-30 19:45 ` Jacob Lifshay
2020-03-30 19:46 ` Immanuel, Yehowshua U
2020-03-30 22:02 ` Luke Kenneth Casson Leighton
2020-03-30 19:01 ` Jacob Lifshay
2020-03-30 19:20 ` Luke Kenneth Casson Leighton
2020-03-31 21:57 ` Michael Nolan
2020-03-31 23:01 ` Luke Kenneth Casson Leighton
2020-04-01 0:23 ` Immanuel, Yehowshua U
2020-04-01 0:44 ` [libre-riscv-dev] additional ddr3 interfaces Jacob Lifshay
2020-04-01 0:47 ` Immanuel, Yehowshua U
2020-04-01 1:01 ` Jacob Lifshay
2020-04-01 11:10 ` Luke Kenneth Casson Leighton
2020-04-01 15:19 ` Staf Verhaegen [this message]
2020-04-01 15:42 ` Luke Kenneth Casson Leighton
2020-04-01 11:00 ` [libre-riscv-dev] PPC on Talos and Playstation 3 Luke Kenneth Casson Leighton
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