Which is the best CPU to add 8-10 GPUS on my B450M ?

Guys I currently have a amd athon 3000g processor on my gigabyte UD B450m V2 Mobo , I currently have 2 GPUS 3070TI and 3060ti , would like to add 6 to 8 GPUs more in the future ( preferably 3000 series GPUs), I have heard people saying athlon 3000g processor wouldnt be able to handle that many GPUs as it has limited PCIE lanes , am thinking of using 1to4 pcie splitters to add more cards as this Mobo only has 3 GPU ports, please suggest if 3000G is enough or which CPU to go for to add 6-8 GPUS more to my rig

Thanks in advance