Hi for i look the problem is the motherboard. Maybe is the low chip is create a bottleneck. I try buying a new motherboard wit a chip-set for new generation of Ryzen and PCI-E 4.0. Then you win for 3 ways, 1 - Better chip-set, 2 - PCI-E 4.0 (wen you Upgrade the CPU) - And the possibility to upgrade a new Generation of CPU wen you cant.