Well I just got my shiny new PSU, plugged everything in, turned the power on, everything is working fine. But my rear fan is running slower than the top? Any ideas as to why this could be? Both fans are connected independently of each other to the PSU. Hardware: Motherboard MSI AMD 790FX-GD70 Processor AMD Athlon II X2 Dual Core 250 3.00GHz (Socket AM3) Memory Slot OCZ Platinum 4GB (2x2GB) DDR3 PC3-10666C7 1333MHz Dual Channel Graphics Card Asus GeForce GTS 250 512MB GDDR3 PCI-Express Graphics Card Hard Drive 1 Samsung SpinPoint F1 RAID 500GB SATA-II 16MB Cache Optical Device Samsung SH-S223C/BEBE 22x DVD±RW SATA ReWriter (Black) PSU 600W Be Quiet Straight Power E7, 80 Thanks.