i don't understand why vizo called it as a case fan. it's more suitable to be a replacement cpu fan cause of the focus-flow like static blades, thus no dead spot in the middle of the fan, which is also usually the hottest spot on a processor heatsink. u don't need the static blades and focussed air flow for case fan, and the static fins might actually contribute to more noise and lesser airflow, not a good choice to use the vizo as case fans.

and hybrid monster, u mentioned that u compared the vizo and vantec tornado, did u compare them physically or u just compare based on specs?

i'm currently using vantec tornado running @ 5V to cool my processor, virtually silent and still pushes quite some amount of air, and certainly perform better than normal 8cm fans. have another delta focus flow 8cm and another delta 12cm 120cfm case fan lying there..

read my post again... i run it @ 5V and use it on my overclocked Tbred-B @ 2.2Ghz now..

by default, it is running @ 12v.
other than the default 12V, u can choose to run @ 7V or 5V.
for 7V, connect the fan's red wire to +12V(yellow) and the black to +5V(red).
for 5V, connect the fan's red wire to +5V(red) and the black to ground(black).

running at lower voltage will give u less airflow, and of course lower noise, but before u try any of these mods, make sure u know what u are doing, i bear no responsibilities for any damage that u might cause to your own PC.

all my fans are running on 5v to reduce noise cause now getting older, cannot stand the vacuum-cleaner-like noise of all the fans running in my PC.. previously when i'm crazy in all these stuffs, i bought a dedicated 12v/14v selectable PSU to power just my fans. see photos of my pc 3 years ago..



now still using the same PC, minus the extra PSU on top, and the delta fan on PSU cause i changed my PSU to enermax liberty, dun wanna void the 5 years warranty, so no modding on the PSU now..