Hmm, so when you plug the 20 pin into the 24 slot on the mobo there shuold also be a 4 pin extra available from the psu to plug into the remaining 4 of the 24 on the mobo.
Then the psu should have a seperate 12v 4pin for the 4pin input of the mobo.
Does the psu have two 4 pin plugs? The first 4 pin should be connected to 20 pin of the psu. Those 2 go into the 24 pin on the mobo. The second one will be your 12v atx that goes into the 4 pin outlet near the cpu.
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Last edited by HowStern; 06-27-2009 at 03:11 PM..