Why computer can't run without GPU?

[NicePotato]

Why? In real life it's possible)

[Miral]

It's not really all that possible in real life. If the motherboard or CPU doesn't have an integrated GPU then you'll just get the dreaded BIOS POST beeps and it won't actually start up.

[NicePotato]

Originally posted by Miral:

It's not really all that possible in real life. If the motherboard or CPU doesn't have an integrated GPU then you'll just get the dreaded BIOS POST beeps and it won't actually start up.

But i can't do this even with integrated graphics)

[Miral]

Originally posted by №1C3 P07A70:

But i can't do this even with integrated graphics)

Are you sure the motherboards in the game actually have integrated graphics? Often similar motherboards exist with and without integrated graphics, and usually the PC building enthusiast won't bother getting the one with integrated graphics because they know they're planning to put a dedicated GPU in anyway...

[NicePotato]

Originally posted by Miral:

Originally posted by №1C3 P07A70:

But i can't do this even with integrated graphics)

Are you sure the motherboards in the game actually have integrated graphics? Often similar motherboards exist with and without integrated graphics, and usually the PC building enthusiast won't bother getting the one with integrated graphics because they know they're planning to put a dedicated GPU in anyway...

Okay. I hope there will be motherboards with integrated graphics)

[LOG3]

Sure you can run a PC without a dedicated GPU.
The CPU takes over rendering graphics. This is called Software Rendering. A GPU is just a specialized Processor made for graphics caluclations. A CPU can calculate them also just not as efficient.

I think this has nothing to do with the fact that modern CPUs have a dedicated graphic chip built in, like a mini GPU inside of the CPU. Technically I think it would also run without it since old processors didnt have those and still ran PCs without a graphic card.

[Miral]

Originally posted by LOG3:

Sure you can run a PC without a dedicated GPU.
The CPU takes over rendering graphics. This is called Software Rendering. A GPU is just a specialized Processor made for graphics caluclations. A CPU can calculate them also just not as efficient.

I think this has nothing to do with the fact that modern CPUs have a dedicated graphic chip built in, like a mini GPU inside of the CPU. Technically I think it would also run without it since old processors didnt have those and still ran PCs without a graphic card.

No. CPU "software rendering" is an entirely different thing. When constructing individual video frames, this can be done entirely in the CPU ("software rendering") or via a combination of CPU and GPU ("hardware rendering"), with the latter usually trying to do as much work in the GPU as possible.

However, actually putting that constructed frame onto a monitor always and without exception requires a "graphics adapter". When the graphics adapter is built into the CPU (which only extremely recently has become a thing) or motherboard (which is more common, but not universal), this is called "integrated graphics", and it is possible to disable or ignore the integrated graphics adapter and use a "dedicated graphics adapter" or "discrete graphics adapter" (ie. an add-in card) instead, which is usually done for improved GPU performance, especially for games. Some laptops will even let you dynamically shift between the integrated graphics (for power conservation) and discrete graphics (for gaming performance).

But motherboards without integrated graphics don't have any video output ports, so there's nothing you can plug a monitor into anyway (if you don't have an add-in graphics card). And a machine with no graphics adapters at all will not exit POST and not start booting, it will just sit and beep.

[LOG3]

Originally posted by Miral:

No. CPU "software rendering" is an entirely different thing. ...

Thanks for clearing that up, I learned something new