Hiya all, Happy New Year Okay, this is my first home build and I'm a little stuck. So far my build is complete but on power up the CPU fan spins then stops and I get the usual CPU fan failure message. At the moment this is with the original cooler (I have another) fitted, to work out if it was the fan or mobo I plugged my second one in but didn't mount it, switched on and away it span. I mount this one and power on, nothing. It just sits there while my CPU cooks up. I do the same as before this time with the original and as before it spins up without problem but now get the CPU fail message again????? My second fan is Arctic coolings Freezer Pro7 Rev.2 Am I missing something??? My system ASUS M4A88T-V EVO mobo 8GB Kingston DDR3 AMD 1055T black 3.2GHz WD 1TB hard drive HAF X Full tower case CORSAIR TX850 NZXT Fan Controller (not connected yet) SONY DVD drive (connected at the moment) I've not fitted the graphics card yet and only have the bare essentials plugged in. Don't really want to blow anything up just yet, there's no OS installed just the main BIOS so far, any thoughts???