When sourcing 1TB SSDs, the interface is the primary determinant of performance and price. NVMe PCIe 4.0 or 5.0 SSDs are essential for high-end workstations and gaming, offering speeds up to 7,000MB/s or higher. For legacy system upgrades or budget-friendly office PCs, SATA III SSDs are more economical but capped at 600MB/s. Always verify the NAND Flash type; TLC (Triple-Level Cell) is the industry standard for balancing cost and endurance, while QLC (Quad-Level Cell) offers lower prices but reduced lifespan under heavy write loads.