Not to be a breaker of all dreams, but that is the worst location for a blower.. let's blow all the hot powersupply air into the case... Would have made more sense to have this thing blowing in at the bottom through the pci slots (cutting out the slot holders of course).
Everybody say it after me: "HOOVER." Good thing it has that mesh grill: I could see having to turn it off after sticking your hand over it and being impossible to pull it off.
I dont think that thing is blowing air into the case. As someone mentioned, it would blow the power supply air right back in, its most likely sucking air out. Since hot air rises, best place to put such a high powered fan is at the top