NIN90 said:
Hey I'm looking for a new PSU. It should be rather silent and it should be able to handle the following specs:
Phenom II X4 940
GTX 460
In addition, can someone recommend a fan for my 460? My room sounds like an aircraft carrier whenever I play something.
If you're sure you're not planning on upgrading from that GPU any time soon, the best silent PSU is the Seasonic SS-460FL, which is completely passive. It is pretty expensive though and obviously somewhat limited at 460W, but it is built very well and 80plus gold. I use the Seasonic X650, which doesn't spin the fan at low PSU temps, and it's also quite quiet with more headroom, though you can hear the fan spinning up / spinning in a very quiet build if it gets hot. These may be overkill for what you need though.
As for the GPU, I don't know if you can just replace the fan and keep the stock heatsink. The usual thing to do is to get an aftermarket heatsink. On my 6850, I use the Accelero S1 Rev 2, which is a passive heatsink, and attached Accelero's Turbo Module to it (you can also just zip tie a quiet 120mm fan to it). In my case, I find that my OCd 6850 runs fine in idle without a fan blowing directly at it, but it needs some additional cooling for gaming. If your motherboard supports voltage fan controls (I think most major ones do), you can use programs to control the fan. For example, using SpeedFan, I set-up the fan speed to be automatically varied between 50% and 100%, based on CPU temp (SpeedFan unfortunately doesn't monitor all GPU temps). If that's too loud, I uncheck the option to automatically vary speed and set speed to 0% for idle, then just check it off again when I'm going to game. Or you can just manually set how fast it spins.
Unless there's a solution that I'm unaware of, going to an aftermarket heatsink kind of kills the idea of directly using your GPU to control your fan, as the stock GPU fan connector is different (smaller) than usual fan connectors. Also, there are other aftermarket coolers that people like that have integrated quiet fans, but I don't have experience with them. You can look into some of them (Accelero, Thermalright, and Zalman are some of the major providers for these).
And last of all, if it works, is keep an eye on just how hot the 460 gets when gaming. If it is very cool, you can possibly let it spin at a lower temp. You can make a custom slope that determines what the RPM should be at various temps in MSI Afterburner.