From: Jean Delvare <jdelvare@suse.de>
To: "Jean-François Roy" <jf@devklog.net>
Cc: Wolfram Sang <wsa@kernel.org>, linux-i2c@vger.kernel.org
Subject: Re: [ee1004] Failed to select page 0 - G.Skill Trident Z5 NEO DDR5, ASUS X670E board - 6.2.11-arch1-1
Date: Sat, 29 Apr 2023 18:06:34 +0200 [thread overview]
Message-ID: <20230429180634.7f94b29e@endymion.delvare> (raw)
In-Reply-To: <20230429171522.05c671f8@endymion.delvare>
On Sat, 29 Apr 2023 17:15:22 +0200, Jean Delvare wrote:
> I took a quick look on jedec.org in search for information and found
> JESD400-5A which covers SPD contents for DDR5 and it enumerates 1024
> bytes. This is twice as much as what EE1004 EEPROMs can hold, so DDR5
> modules are definitely not using EE1004 EEPROMs. So far I couldn't find
> the "equivalent" of EE1004 for DDR5 modules so far.
Found it, it is named "SPD5118 Hub and Serial Presence Detect Device
Standard" and is published by Jedec under reference JESD300-5B. That's
a 126-page document. In comparison, the EE1004 specification was
35-page long.
So I expect there will be a lot of work to get it to work. And I don't
own a DDR5-based system yet, so I can't even test.
--
Jean Delvare
SUSE L3 Support
next prev parent reply other threads:[~2023-04-29 16:06 UTC|newest]
Thread overview: 5+ messages / expand[flat|nested] mbox.gz Atom feed top
2023-04-20 22:51 [ee1004] Failed to select page 0 - G.Skill Trident Z5 NEO DDR5, ASUS X670E board - 6.2.11-arch1-1 Jean-François Roy
2023-04-21 4:35 ` Wolfram Sang
2023-04-29 15:15 ` Jean Delvare
2023-04-29 16:06 ` Jean Delvare [this message]
2023-05-01 16:42 ` Jean-François Roy
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