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On 09/21/2017 08:47 PM, Teqleez wrote:
> Hi all.
> I assume this is relevant not only for considerations related to
> the practical limit/benefit of increasing RAM in existing
> computers, but also regarding the specifications when buying new
> computers.
> - At the following amounts of RAM; 8GB -> 16GB -> 24GB -> 32GB ->
> 48GB -> 64GB, how much does the requirements for the graphics card
> memory increase with each step, if we assume the
> normal/daily/"permanent" usage to be 70-80% of the available RAM?
> This obviously depends on how many different VM's one has open, and
> how much video memory each one needs, but can we make an assumption
> on some sort of average number for this, to see if it is possible
> to find some kind of rule-of-thumb figures?
> For example, if we assume a "normal"(?!?) Qubes-OS user whose sole 
> reason for increasing memory is in fact to be able to run more
> Qubes simultaneously; how many more Qubes can he/she expect to be
> running per extra 8gb of RAM, and how much more will each such step
> "typically" require of the graphics card memory, if we assume a
> "linear" growth in the number of concurrently open Qubes?
> I am guessing that with the capacity to run (increasingly) many
> Qubes, the amount of applications running in each one will be
> lower, to the point where we most often choose to run
> "one-app-qubes". For the sake of this example we could also assume
> that this example user is a "lazy" person who will not bother
> configuring minimal templates, but only use the default shipped
> fedora-24(++) template for each one, just for the sake of
> simplicity and playing around with these numbers a bit.

IMHO there is no real connection between RAM used by the OS and apps,
a and the RAM ins your VGA. (VRAM)

VRAM is used for:
- - game (3D) data rendering, which is out of scope in case of Qubes
(maybe if you using Compiz with fancy desktop effects)

- - display rendering.

The later is still need more and more VRAM because of the bigger and
bigger common resolutions Like:
800x600 -> 1024x768 -> 1920x1080 -> 2560x1080 -> 4K -> 8K -> etc.

So you still need more and more VRAM to render all your pixels in your
screens. These can be multiplied if you start using multi-monitor setups

But these needs are not growing as fast as your conventional RAM needs.
I'm using 3xHD screens, and the 512Mb VRAM used by the integrated VGA
is still enough for that,  while my OS has 16Gb RAM.

- -- 
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