if u want just a heatsink/noiseless, its probably much safer if u get an aftermarket heatsink for the cpu. Just the stock heatsink would probably overheat. and plus, you wouldn't want to risk a few hundred dollars
stock heatsinks are fine if you don't oc or and you don't put incense in your computer.....unless you mean no fan, then get something copper based or better even copper fins
stop heatsinks are designed so that it can provide enough cooling for a cpu at stock speeds. If you're gonna oc, get a better one. Or else I would just stick with the ones that came with your processor.