With the heatsink installed and the system put back together, I can do a few tests. This particular machine is always running and has at least a 50% load on it at any given time thanks to Folding.
The processor is a dual core so you will see 2 windows for the CPU usage history.
Let's take a look at the temps right after the machine starts up. This will give a quick idea as to where we are right away. My basement is fairly cool; close to 65F degrees.
After leaving the system run all night and playing some games, the machine has warmed up a bit. I was running at 33C for the CPU on the stock HS with the same load and games. The highest I have seen this new heatsink is about 45C, I didn't have gimp for windows running and forgot to save the screen shot before I rebooted the system.
I was able to get the PWMIC back down after moving one of the power cables that was blocking airflow. It now sits around 49C and not in the RED zone anymore, but it is still a couple of degrees higher than it was with the stock HSF. I'm guessing it has to do with air not being pushed down across the motherboard. This heatsink airflow is from the front to the fan through the fins and out. The way I have the fans oriented in the case does leave the air flowing from front to back.
The Silent Whisper has done an ok job of keeping things cool. It is quiet compared to the other fans I have in my case, but they were bought for the UV effect rather than their silence. Size of the unit may make it difficult to place in some cases, and it almost touches the door on my Antec Dragon case. Weight is within the specs for AMD processors and it is not something that you need to be worried about.
All in all, I would say if you're looking for a cheap HSF that is made for someone that needs to replace an old one or is new to building a system themselves, the Silent Whisper could be what you're looking for.
Thanks to CrazyPC for sending over this sample!