Yeah, I question that too? A 20-pin with a seperate 4-pin ATX connector is the same as a straight 24-pin in my opinion. You plug them in differently, but it has the same effect. My motherboard and PSU allow both ways. I can either plug the 4-pin in next to the 20-pin thus creating a 24-pin; or plug the 20-pin in, placeing the 4-pin in its spot next to the processor. I've done it both ways and haven't noticed any ill effects? Of course I haven't put it through rigorous and comprehensive testing, but I haven't noticed any decrease in my overclocking potentials.