DynatronA26 2U Active Aluminum Heatsink with Heatpipe Embedded for AMD EPYC Socket SP3

I've always built my own servers for home use. Recently decided to build a Proxmox VE cluster for failover/high availability. I've always used 4U cases b/c you can use 120mm fans and keep the noise way down. Problem is that 4U cases take up a lot of space and 3 of them takes up a huge chunk of a full size rack. Decided to try 2U cases and hope I could keep the noise down with Noctua NF-A8 80mm fans and hopefully, a CPU HSF that wasn't a screamer. Have not traditionally had good luck with 2U HSFs, until now.Dynatron makes this, the A26 and another 2U HSF, the A38. The difference is that the A38 has a copper baseplate, copper heatpipes and an 11,000 rpm 60mm fan. The A26 has an aluminum baseplate, copper heatpipes and an 8,000rpm fan. I gave the A26 a shot due to the lower speed fan and the fact that the CPU will not be running above 50% usage under normal circumstances and that keeps the heat down. I am extremely happy with the A26. Could not be better.Using this on SuperMicro H11SSL motherboards with Epyc 7302 CPUs. SM boards have IPMI fan control profiles that let you set a starting range for the fan speed. Using the "Optimal" preset, the A26 idles in Proxmox at about 25% CPU usage, at around 1600rpm/37C. "Loud" is subjective but I'm pretty picky. You can hear the server from about 5 feet away but it's a very soft "whoosh" with no perceptible "tiny CPU HSF fan" whine.Pretty much any socket SP3 board (Threadripper/Epyc) is going to have some kind of BIOS fan control or fan profiles. For fun, I set the fan to "full speed" and as expected, the server sounded like a small jet plane taking off. An 8K RPM 60mm fan is just a loud, whiny mess. No getting around that. But at under 2K RPM it's almost silent. Assuming you can control the fan speed to some extent, particularly the low rpm range, you're going to love the A26.Was a little worried about the lack of a copper baseplate, but the A26 is well-designed. The fin portion has very narrow, fine fins, which increase surface area and the 60mm fan is a perfect fit, blowing through pretty much every fin as opposed to some larger 3U/4U coolers that have a larger fan that blows through the middle section of the fins but not the outer edges.Buy this, you won't be disappointed.

Works great and isn't noisy. Easy to install and came with preapplied thermal paste

This is just what i needed for a fan. it is loud but it keeps a thread ripper cool and wont block the ram.

Bought a 24 core AMD Epyc with its motherboard and needed a good cooler. I wish I had found these sooner for my other builds. Easily fits in a 4U rack mount case.

I’m using this to cool an Epyc 7502, the fan is almost silent under heavy loads and this is very capable of cooling off those 32 cores.

This is a great cooler for rackmount cases with limited height. Does a great job cooling and the noise level is a lot less than what I was expected even at high rpm’s. I got two of these for a dual Epyc build and very happy with it so far.

This fan is not silent. It''s not even silent under medium load and somewhat silent under light load. I'm trying to run a silent server and it has 14 fans on it. This cpu fan is louder than all 12 other fans combined. The light load is still louder than the other fans I have.Also, the image in the product page is wrong. In the image, you can see 4 large screws. If the fan was poor, my goal was to replace the fan with a better one. But the fan you get has a special screw built into it that you can't see. I stuck a small scope camera into the screw hole and it looks like you need a small (like 2mm) socket wrench for it.You CANNOT replace the fan.

It's in a server, so I have not done extensive noise testing, but it does keep the cpu in a 24x7 NAS / virtualization server under the limit. I'd give 5 stars, but I have 0 benchmarks, and nothing around noise since the other two fans in the case make a ton of noise.