In olden days before the core series from Intel, motherboards used to have small graphics chipset on it. Rather than being integrated on the cpu. Why was this discontinued? Current gen mainstream AMD cpus do not have processor based graphics like the Intel ones do. (the G series parts come very late and technically are low end stuff.) sometimes you do not need a discreet gpu. So why was chipset graphics discontinued, it could have been used to decrease the cpu complexity on Intel side. While Amd would not need to have to launch apus. Hence saving development time.
In: Technology
Both Intel and AMD, over the years, have moved many functions that would previously have been handled by part of a motherboard chipset to being part of the CPU die/package. This includes just about everything that would have also been bundled with a chipset GPU on older motherboards.
From a technical perspective, there could be a huge bandwidth penalty for placing a GPU directly into the motherboard, since it may have to use the PCI Express lanes coming from the chipset unless it were to cannibalize the lanes coming directly from the CPU (taking away lanes from a discrete graphics card or pci express solid state drives). Also keep in mind that integrated GPUs don’t have their own RAM: they must share RAM with the CPU. If placed on a chipset PCI-e lane, the graphics card would be bandwidth starved to hell just trying to access the system RAM.
There’s just no incentive to create a solution like this.
Basically, in terms of both cost and performance, it makes sense to place a basic GPU on the same die/package as the CPU than anywhere else.
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