For one PCIe SSD be more commercial or server geared than the tradinational needs. PCIe SSD can be quite significantlly faster and hold much larger capacities but are also quite significantlly expensive. Like 1K is cheap for this type of SSD. Mainly seems to be designed for sevrers it seems where large amounts of data will be flowing through and being accessed simultaneously. Otherwise just stick to SATA. Unless your filthy rich and don't about how much anything costs LOL!