Are the fans connected to the three pin headers on the motherboard or directly to a hard drive power connector? The speed sensors are built into the 3rd pin of the motherboard headers, and if the 3rd pin is not supported or it plugs directly into the power supply's HDD connectors, it can't read the speed sensor
No, those wont make hte sensors work. The plugs with the HDD-Style plugs dont have a sensor plug, just power. So unless the fan has a 3-pin connector directly on it with the 3rd pin enabled to plug into hte board, the speed sensors will not work.