I see that AMD recommends liquid cooling for the 3950x.
However from the comparison testing I've seen, aircolers such as the Noctua "NH-D15 SE-AM4" perform just as well as not just 280mm AIO's, but the most robust AIO's, so this recommendation surprises me, and I even wonder if aircooler manufacturers such as Noctua have a sound basis for legal action.
Am I incorrect? If I really shouldn't consider aircooling for a 3950xz please do let me know.
Thank you very much for your reply, John, but I contacted AMD support at the same time I posted this. I posted here also because I'm about to be a 1st time PC builder using a 350x and (see my 2nd paragraph) I honestly want to hear whether or not I'm correct that the best aircoolers are effective as any AIO.
AMD's recommendations are just that, recommendations. You can use whatever you want. But when reputable review sites such as Techspot and TomsHardware show that even powerful closed loop coolers AT STOCK (no PBO) are struggling to keep the chip under 75*C in real world usage, the fact that Turbo frequencies are heavily dependent upon temperature, and the fact AMD doesn't list a thermal maximum (as of this post time) on the specifications page so you don't know, officially, what the maximum operating temperature is, if you want to risk your $750 chip on an air cooler, even though it may be listed as compatible by the manufacturer, feel free to, but AMD doesn't honor any warranty when the chip has overheated, and retailers don't accept any returns for lower than expected performance.
Thank you very much for your reply, black_zion, but my confusion is based upon seeing comparison testing that shows that the best aircoolers are just as good as the best AIO, and you really didn't address this.
black_zion, AMD did not initially list a Max Temps for Gen 3 processors. Ryzen Master always listed it and AMD started including it in their specifications. For some reason, the current 3950X specification does not have a Max Temps. Here is the specification for the 3900X. Enjoy, John.
AMD Specs show that the Ryzen 9 3950X has the same TDP as the 3900X (105 watts). Also since the 3900X has a Max Operating Temp of 95C that should be the same for the 3950X since it seems that all 3rd Generation Processors have the same Max Operating Temps of 95C.
I agree with you, If AMD Recommends a AIO CPU Cooler it would be best to go by their advice. AMD doesn't even recommend to solely use a AIO CPU Cooler for the 2nd Generation Threadrippers because in their list of recommended CPU Coolers it has both Air and Liquid CPU Coolers listed whereas for this 3rd Generation Processors it doesn't list any Air CPU Coolers.
Remember the 2700 and 2700X though of the previous generation, the 2700X had a thermal max 10*C lower than the 2700, so it is possible the same thing could apply here, the 3950X may have a Tmax of 85*C as opposed to the 3900X's 95*C. As far as TDP goes, AMD "lies" as much as Intel did with the 9900k, they're both 145w processors at stock (no PBO).