Dynatron A27G 60mm 2 Ball CPU Cooler

Pros: In 2U server, out-performs stock AMD 6000+ fan by 11 degrees at my new idle temp of 105F vs. 116F with stock fan. Sustained torture CPU temp max of 136 to 141F compared to stock AMD cooler max at 153F (before needing to abort the test because of 145F AMD recommended max operating temp for the 6000+).

Cons: Not rated for 6000+ 125W CPU thermal design (but outperforms stock AMD cooler in this application). Rated in specs up to AMD 5200+, which is 89W thermal design. No real cons, if you understand this is for a rack-mount server to be deployed in a datacenter so the noise of *all* of the fans in a 2U server isn't an issue.

Overall Review: Tested in 78F climate controlled environment which will be max temp in datacenter environment of 72F +/- 6 degrees. The front-do-back direction of airflow is probably the largest contributing factor in a 2U case. The stock AMD fan in a 2U case took air from the top (that already may be heated) and pushed the air across both sides of the motherboard, which heated the memory on one side and heated the stovepipes on the other side. (ASUS M2N32-SLI Deluxe w/8GB G.SKILL RAM, 6 W.D. 320GB SATA's as RAID 0+1). With the cover removed from the case, the AMD stock cooler slightly outperformed this cooler because direction of airflow wasn't an issue.

Pros: Side blowing heatsinks are by far the best for quick cooling. This thing will keep your CPU as cool as possible with the max possible heat displacement.

Cons: This thing is LOUD! I have to use the motherboards power performance options to reduce the settings so the fan wont be so loud. Even then, it's annoying. Really heavy also. I woudln't recommend this for someone trying to make a quiet machine. Awsome for overclocked people who don't care about the noise.

Overall Review: Given that there aren't many am2 heatsinks to start, this is the best but with a horrible downside. If all you are using is a 65mm CPU then don't bother pluging the fan in.