why 1G memory is missing?

To: "debian-user" <debian-user@lists.debian.org>
Subject: why 1G memory is missing?
From: <loushanguan2015@sina.com>
Date: Tue, 03 Aug 2021 06:11:36 +0800
Message-id: <[🔎] 20210802221136.A31002D000A1@webmail.sinamail.sina.com.cn>
Reply-to: loushanguan2015@sina.com

i have 2 memory slots

memtest86+ shows each has 2G, but total is 3G

after booting linux, top shows total is 3G

why 1 G is missing? Thanks!

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- Re: why 1G memory is missing?
  - From: Jeremy Hendricks <jwh1981@gmail.com>
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  - From: IL Ka <kazakevichilya@gmail.com>

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