Molex to SATA, lose all your data. Injection-molded thermoplastic SATA power connectors have a tendency to short internally and catch fire, as opposed to SATA connectors made out of two separate pieces of plastic clamped together with a seam.
Yes something like that happened in this dusty, old machine. Good thing she was using the PC when it happened and unplugged it when she smelled the burnt plastic.
