Im Is minimum fan spin voltage dependant on rpm? Yes, in most cases 'H' type fans are able to start\spin at lower voltages than 'M' or 'L' ones. The working current of the fan will tell you more: >0.20A = good (ability to start at\below 3V). <0.20 = bad. Note that the above is only true for 80mm an...

NeXt:
but no one's actually given me a straight answer of whether it's safe or not to?
No, it's not. At least my 300W Fortron is currently almost dead (2 years of operation w/ stock fan at 900 RPM) - max output doubtly exeeds 200W

JonA The air in your room is cooler than the air inside the chassis, so it is more efficient to make the rear fan an intake. But in this case you'll need a: 1. proper duct, different from the one in the picture. 2. "chimney" on the PSU exaust to prevent hot air from being sucked into the case by th...

munichkid : I was thinking about unplugging the fans and installing a 92mm fan at 7 volts blowing from the back of the card to the front ( i.e. ram end to video connector end ) . Do you think this will be enough? I think it would be more efficient to glue the fan directly to the heatsink using rubb...