Works 22-100-41 4-Pin To Fan 3-Pin Cable Adapter, 14.5 in. Long Convert a PWM fan 4-pin header to a regular cooling fan's 3 pin header so you can plug it to the motherboard's 3 pin fan header Now you can power a PWM fan from motherboard's 3-pin fan header, or control the speed a PWM fan with a fan controller. PWM 4 pin male to regular cooling fan 3 pin female, 14.5" long end to end, black sleeve Genuine real copper cores, 22 AWG - we'll never use recycled copper in any of our cables and stand behind our products 100%!