Why Is There No Way To Hook Up Large 4 Pin Fan Moulex Connectors To My Motherboa

The Thermaltake Spedo case fans use a large 4 pin Moulex connectors. There is no 4 pin to large 4 pin Moulex adapters with the ASUS Rampage III Extreme MB. Now I was told you can use a 3 pin to large 4 pin moulex connector just the fans would run on high the fourth pin is to control the fan speed by the CPU is this rite?? Well I used the Thermaltake 760si water cooler it has the same kind of problem with hooking it up also to power it has a small 3 pin which goes into 2 large 4 pin Moulex connectors.. I used the 4 pin CPU Fan to go for power for the water cooler when I power up got an error message CPU fan Failed and that it was not a stock fan so I just turned it back off... Is there another way to hook up both the fans and the CPU water cooler. Every thing else seemed to work because it was ready to go just no power to fans or water cooler.. Thanks for any help you can give Richard