Build Advice USB 3.0 External Drive vs SATA Internal Drive? Hardware
SATA 6 Gbps:
In conclusion, we can see that attaching the drive to eSATA or a SATA connector will provide you with better performance overall, and greatly reduce CPU usage (CPU is interrupted only when needed with the SATA controller as the controller does all the work instead).
결론적으로 SATA가 USB3.0 보다 빠르고 CPU 부담도 더 적다.