24 pin power connector

[pooh]

this is my second build the first one was in 96 my problem is with the 24 pin connector on the motherboard, it post with 20 pin + the 4 pin for the cpu but it with the 24 pin thers no post no fans it's all dead even if i add the cpu 4 pin. I'm at a lose on how to get the 24 pin to work.

build info
motherboard asus m4a78t-e
power supply cm gx 750w
amd x4 965
cpu cooler hyper 212 plus

[LarkStarr]

are you sure you're inserting all the connectors with the correct orientation?

[Stock]

Make sure you flick your power supply on (there's a switch at the back).

Also, try the PSU in your previous desktop so we can rule out whether or not it's a dud.

[pooh]

i'm getting 12v on the 2 yellow wires on the p3 connector for the cpu for a total 24v and on the P1 mo connecter the last 4 has 12v yeallow 3.3v orange 5v purple for a total of 20.3v, dont i need 3.7v on it to make the 24v for the cpu.

[frontier204]

??? those voltages don't sum.

The extra 4 pin for a motherboard give you another +5, +3.3, +12V, and GND to allow you to have more CURRENT, not voltage going to the motherboard. The CPU is the same thing, where +12V are placed in PARALLEL so you have have more current going to the CPU, but still at +12V (to allow the motherboard's VRMs to send the ~1.2-1.3V or whatever the CPU actually wants).

[Ctech]

Where's the RAM???