HELP! Case fans not turning

I've just replaced my Antec PSU for a Seasonic S12-380 and the case fans for 2 sharkoon 1000 120mm fans.

I've plugged the Seasonic's fan monitor into the PWR fan header on my Asus P4C800E-Deluxe motherboard and the 2 fans to the fan header-molex connector.

When I startup no case fans are spinning. I've got Q-Fan enabled and am running Prime95, running Winamp with visulations to stress computer as I type this. CPU temp is currently 33'c, system at 26'c. The PSU fan is at 799rpm but still no case fans kicking in. Surely they should be running by now?

The fans work if I plug them in directly but I was hoping that I wouldn't need to run them at 100% if necessary.

Any ideas?

With temps like that under load you dont need the fans. So the motherboard isn't turning them on. Disable Qfan and then will probably spin.

Thats very cool for your specs though, maybe it's reading the temps wrong?

Can you use Speedfan to control fans if they're plugged in to the motherboard headers?