This is a female SATA to male SATA cable with 3-Pin Slimline Optical Drive Power cable. This cable will let you power a Dell YG554 IDE to SATA Interposer or similar power connection without surrendering one of your PSU's SATA power connectors. A number of older Dell systems power supplies use a non-standard power connector to power the Slimline Optical drives through an IDE to SATA Interposer. With technological enhancements this power connector was removed in newer Dell power supplies replaced by "Slimline SATA". This adapter converts one SATA power to a SATA and 3-pin power connector, permitting you to replace old power supplies with new models without replacing your old optical drive. This cable is useful as a SATA power adapter cable for a SATA hard drive and 3-Pin power for DELL 745 Small Form Factor PCs.