This is not really about overclocking, but it is about heatsinks and fans, so I hope that this is the correct place to post.
I am looking for recommendations for a heatsink. The two most important attributes are that it fit my motherboard and case, and that it is very quiet at low to medium fan speeds (for audio mixing and video playback). Cooling efficiency is secondary to noise levels. I won't be overclocking unless I find a need. Gaming is light (Starcraft 2, Guildwars 2, etc.) and not a priority.
The PCI-e slot for a video card is in the highest of the seven possible spaces. Some motherboards leave the highest space open and start at the sixth space, but mine has less room. The case is an old Antec Sonata mid-size tower which has 7 inches from side to side, leaving about 6 inches for the heatsink's height.
The stock fan for the 3570k has a whiny ticking noise. I tested the noise by disabling all fans and drives except the PSU and CPU. The noise remains after many adjustments of the CPU fan's wires. If it were not for this noise I would probably stick with the stock fan.
The one fan I have bookmarked so far is the Arctic Freezer 7 Pro because is looks like it would fit and it would not require unmounting the motherboard to install (I do not have access to the bottom of the MB inside the case). Does anyone have experience with this model? Is it as quiet as the stock Intel fan? http://www.newegg.com/Product/Product.aspx?Item=N82E168...
Any other recommendations?
Sorry for the length of the post. Thank you for reading.