Here's a personal review for you, I installed the NV5 Silencer last week.
New NV5 Load Temps = Old Stock Idle Temps!! Temps went from 54/38 idle to 42-44/32 idle. Under load, after 1-2 hours of gaming or a 3dMark05 run, the temp may SPIKE for a second at 60-61, but hovers around the old stock idle speed of 54. That alone justifies the install for me.
Noise went from being able to hear the computer slightly out in the hallway to having no idea if it was on until I was sitting at the desk.
The 'wife' test went something like this "Wow, the computer is A LOT quieter."
Of course now she is questioning why I am buying a Zalman 7700, to be delivered TODAY, since it's already 'quiet.'
I just said 'Cuz it'll be ever MORE quiet.'
- Jelifah