Apparatuses, methods and storage medium associated with automatic SATA receiver equalization margin determination and setting, are disclosed. In embodiments, an apparatus may comprise a BIOS configured to determine, during POST, whether a device is attached to one of the SATA ports, and on determination that a device is attached to one of the SATA ports, further determine whether a receiver equalization margin has been set for the device. Additionally, the BIOS may be configured to perform a DTLE training to dynamically determine and set the receiver equalization margin for the device, on determination that a receiver equalization margin has not been set for the device. Other embodiments may be described and/or claimed.