I plugged my fans into the fan headers on my mobo.
I plugged the CPU Fan into the CPU header.
The Rear FAn into the power Fan 2 Header.
The Front fan is connected to a molex.
For the HDD, it worked fun for about 3 hours, installed window 7 then installed the realtek audio driver, and nvidia driver, then my comp started have frequent freezes. I turned it off to call it a day then when I woke up to turn on my comp, it asked me to insert a boot media disk. So i checked my bios and my HDD wasn't connected or detected.
My brother comp has the exact spec beside for a different case. His MOBO detected his fans, and his HDD worked. When i plug in my HDD into his comp, it wasnt detected either, but when I plugged in his HDD into my comp, it was detected and booted normally.