Is not all the RAM available on the laptop?

Question

Iron

I have 8GB of RAM, 6.7
1GB is available from it, the video card consumes, where could the rest go?
Any restrictions such as ticks are not worth it. 6.7 on both Linux and Windows.

Answer 1

In my case, this is:
the core
input output streams
keyboard mouse and similar peripherals
a table for drawing virtual tables for the same output stream
in the heap eats what is
+ to this, there is an oversight in the calculations for the OS, it definitely will not work, because of possible the following reasons:
1. again, an oversight
2. not all RAM addresses are available for display through standard tools
+ there is still a theory that the bios can eat a little, but, most likely, it eats a little, since it is needed to boot the OS and the rest of the garbage, after loading the OS, it frees up memory
for monitoring the RamMap

Answer 2

Different devices can reserve part of the memory for themselves. 300 MB is not a big loss (although it is not a loss at all)
Extended answer on the MS website:
On Windows 7 computers, the amount of available memory ...

Answer 3

When memory fails.
Your Brain draws two versions:
1. Secret computer gnomes steal your memory from you)
2. The manufacturer does not report 300 meters to each bar and profits.
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Everything is much simpler.
Devices can reserve part of the RAM for themselves.
As an example - a video card that eats it a lot and you know where to look.
But in your computer there are a lot of devices, open the device manager and you will see all of them at once.
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And for good, google, your question has been answered for 20 years already with a lot of answers very and more detailed.