Its strange that the enermax has an 8 pin and a dual 4pin for CPU only? too my knowledge there would be no difference would be better off leaving the 8pin off the psu altogether and using the dual 4pin same thing? or so i thought.
And yes they will still work with 4pin only you just wont have as stable a power as the 8pin.
Ok the way i read that ... the 8pin is for DUAL cpus (one in one hand and another in the other hand) The 2x4pin is for stability on single cpu arrangements (generally more power for quad core cpu). I still dont see how there would be a difference in power supply between the 8pin and 2x4pin. That PSU has every connector you could ever dream of