I have an Inspiron 3670. I want to add a NVIDIA GeForce GTX 1650 and I need a PSU with a six pin plug to power the new GPU. What the cheapest PSU that will work? Or is there any way to add six pin plug? I'm already using the 2 SATA Power slots on the motherboard to power my HDD/Blu-ray drive and a PCI-E USB Expansion Card.