What increases the total memory of the GPU?

Question

Video cards

In short, a bunch of questions due to misunderstandings. and I don’t understand at all how, why suddenly my video card costs more than a laptop.
1. What does it mean to somehow increase the allocated memory in the BIOS, where does it come from, out of thin air?
2. What does shared and allocated memory mean, and I never understood after reading the first 30 articles. For example, the total 3GB dedicated 1GB, what does this mean. Is it one memory?
3. Is the speed of access to it the same?
4. It is written that this total is taken from the operational, but this cannot be if the RAM is occupied by something else. Or what if you put 16GB of RAM, then you can put a total of 8GB of total graphics?
And then what is the meaning of the highlighted one? If you can only put everything in RAM? Why do you need a video card then?

Answer 1

In short, yes, the memory for the embed is allocated from the RAM during BIOS initialization.
Yes, it works approximately as you described, although I doubt about such a large volume - now they are making a "ceiling" of 2-3 GB and, in this case, after launch, the system will not see all 16 but 13-14 gigabytes.
As for speed, the video memory of the video card itself is much faster than RAM and is optimized for graphics.
As for why you need a video card - despite the fact that now there are many successful * solutions that work on the video system built into the CPU, most of the new technologies available on the PC (tracing, dlss, etc.) are so far only available in full-fledged video cards. In addition, the built-in is, for the most part, a gag, on which, of course, you can work / play, but in any case, it will be inferior in power to the video cards released in the same period.
* At least the last three consoles from Sony, xbox (except the very first one), steam deck, and many other consoles, but I don’t know about their hardware.

Answer 2

Are we talking about a separate vidyahu or about the installation?
1. Means for the built-in video core in the processor. From the RAM
2. General - the total amount of memory on the video. Dedicated - busy at the moment. (I think so, depends on the context). But in your case, it means video memory + video cards. And just video cards.
3. It differs many times in speed
4. well, if the memory is busy, the system will go into swap, then the process (game) will simply
crash 5. how much you can put depends on the video core of the built-in
Video is needed to calculate physics, reflections and other things. It is needed because there is a chip sharpened for these algorithms and it is much faster than embedding in the CPU.
The embed is suitable for basic work and YouTubers.
If you need to actively work with video, physics games - it just can't handle it, maybe it's slow

Answer 3

I don’t understand how, why suddenly my video card costs more than a laptop.

an integrated video card contains at least a dozen other shader processors, while a discrete video card has several thousand shader / vertex / tenser processors ...
The RAM in a discrete video card is a couple of orders of magnitude older than the class (ddr5 and ddr6 are faster, more capacious and energy efficient), as well the architecture of connecting processors with this memory is built in such a way that it allows simultaneous access to several of its parts at once, which speeds up the work by a factor of (sometimes even 100x), plus a bunch of additional modules designed for rendering graphics
. The main advantage of the integrated video card is low power consumption (and low price), and the power of modern ones is comparable to discrete video cards 10 years ago, which is quite enough to run many games and applications.