True, but if you noticed it seems like all 3rd generation processors have the same 95C operating limit. It would be odd for this specific processors to have a higher or lower Max Temp. which is why I mentioned it.
So far I haven't seen any 3rd generation processor with less than 95C max temp. I might be wrong. but that is my impression.
Whereas 2nd Generation processors do have different max temps.
I was wrong, I will follow AMD's recommendation, and I have y'all to thank!
I'm sorry, I apologize to y'all and to AMD.
I dug into more comparison reviews, and I see that the best AIOs outperform the Noctua NH-D15.
I wouldn't be surprised if I could find an AIO on https://www.amd.com/en/processors/3950x-thermal-solutions that doesn't, but I'll not bother.
This article mentions that Air can be as effective as Liquid but Liquid is more efficient at removing heat:
3rd generation processors are much more different than 2nd generation processors and earlier. They heat up differently due to the way the chips are aligned inside the processor case.
See this previous AMD Thread about a User using a Noctua Air Cooler having high temps on a 3rd generation processor: https://community.amd.com/thread/244048 . Some of the Users explains the difference in the 3rd generation processors in how they heat up.
In your case, I would follow AMD recommendation in getting a Liquid cooler since they are more efficient at removing heat than air. Actually this is the first time that I see that AMD recommends solely liquid CPU Coolers for one of its processors.
I just built a computer cooling a 3950X with a NH-D15 Chromax Black. With PBO on I hit a max of 66C while live streaming gameplay so the gameplay and encoding for the stream are all on the processor. I stream mostly World of Tanks, which is pretty CPU demanding. Keep in mind when you're using an air cooler you need a case that has good airflow. I have my setup in a Cooler Master Mastercase H500M. I've seen benchmarks showing the NH-D15 on par and in some cases a little better than 280MM AIO's. I have no complaints.
Just purchased a 3950x and awaiting its delivery as well as my ASRock Creator Motherboard and I am mounting this all in a 3U high rackmount chassis which internally is approximately just over 120mm in height.
My issue is being able to water/aio or fan cool this cpu in my 3u chassis case, I'd prefer to go with AMD's advice about going AIO for this CPU but, I'm struggling to find a cooler apart from the Corsair Hydro Series H5 SF
My question is, can I use the
Hydro Series H5 SF to cool the AMD 3950x effectively? I am not overclocking the CPU and will run it with 64gb of memory, any help would be appreciated as I have approximately 120mm of height to play with in my 3u rackmount case.
Your help would be most appreciated!
If it isn't on the AMD list of supported coolers it would be best to ask the manufacturer of the cooler if it is adequate for cooling that chip or not. You should ask their support department. If it isn't on the AMD list already they likely are not going to know.
My best guess would be NO as Corsairs support page only claims compatibility up to AM3 with ZERO mention of AM4 platform support at all.
That doesn't mean it can't as is or may need a new base plate etc.....
You need to ask Corsair support if this is a product you already have and want to reuse. If not I would look for a product that mentions support with AM4 and specifically this CPU too if possible.
If you are wanting this for the low profile. Noctua makes a great low profile air cooler and it does claim support for the whole Matisse lineup Which is Zen 2/3xxx series. You could fire off an email to make sure that Noctua says that yes it is adequate to support 3950, if interested. I prefer when they list all model numbers instead of families myself.