Unless you have a Gigabyte board your D14 fans will have a fixed RPM. Silver Arrow has PWM fans, and runs 3dB quieter than the D14.
SA > D14 by a little less than 1c
D14 > Frio by 3 - 5c
Frio is an excellent heatsink, but the other two are the very best.
For a non-Gigabyte mb, probably the best bet would be to mail-order a SA. Whatever heatsink you get, be sure to buy low-profile RAM.
If I only have 2 sticks of ram (2 x 4GB) will it matter if it's low profile or no? I was gonna get G.Skill Ripjaws, but I might get the low-profile G.Skill instead.
I would recommend taking a look at my thread, The Sandy Stable Club and at the top of the spreadsheet select cooling, you should be able to see temps and how the cooler's are performing under different or similar overcocks, it's quite informative.
Hope that helps, link is in my sig
I'll be honest, I'm not 100% sure what exactly I was looking for there. It looked like in some setups the Frio was doing fairly well when compared to the D14. The only one that really stood out was the Silver Arrow.
Edited by JBVsev - 8/5/11 at 10:33am