hello everyone

today we will learn about the Pcie bus

between the CPU and the graphics card

CPU and the graphics card

the communication bus between GPU and CPU

we call it peg bus

used for CPU and GPU control and signal transmission

this peg bus

which is upgraded from the previous Pcie 2.0 bus

so in some circuit diagrams

it is still called the Pcie bus

this bus has a total of 16 groups

but some models will not use all of them

some models only use 8 or 4 of them

it consists of 4 wires in each group

these 4 lines are composed of a pair of sending

and a pair of receiving

the data is transmitted through the coupling capacitor

in the middle

the PG bus is the part identified in the picture

GPU on the left

CPU on the right

there are many coupling capacitors on the Pcie bus

one end of the capacitor is connected to the GPU

and the other end is connected to the CPU

in the circuit diagram it looks like this

one end is connected to the GPU

the other end is connected to the CPU

this capacitor is connected in series in the Pcie bus

the role of the coupling capacitor here

is to isolate the DC voltage at both ends

ensure the normal communication of high

speed signals at both ends

this also applies to the characteristics of capacitors

the characteristics of allowing high

speed signals to path through

and separating the 2 ends of the DC

this is the Pcie bus

between the CPU and the graphics card