Dynatron A39 - A Good Heatsink For Threadripper/EPYC 4U Systems

[M@GOid]

Unfortunately not that much than 90mm, for example on Noctua side only the NH-U9 TR4-SP3 fits in a 4U case (90mm), neither the NH-U14S TR4-SP3 (140mm) nor the NH-U12S TR4-SP3 (120mm) fit, you would need a 5U case for them. the 12S and U14S are too much high for ~1cm (a bit less for the U12S) maybe someone can try to saw the tips of the heatpipes… but maybe the fan would not fit anyway.

Arctic Cooling do sell a 120mm cooler for Epyc on 4U chassis, the "Freezer 4U SP3":

[illwieckz]

Arctic Cooling do sell a 120mm cooler for Epyc on 4U chassis, the "Freezer 4U SP3":

Wow that's super nice! I wonder why Noctua does not do something like that! One thing is that they reuse their usual fans (which also make them easily replaceable) while those fans are very specific.

[sophisticles]

Maybe i'm out of he loop but would anyone ever actually use such a thing in a real build? For a processor like the one tested, wouldn't your only real choice be water cooling?

[horizonbrave]

"Quietly released"...

[flavonol]

Good for air-flow. Not so good for silent operation, not at 6k rpm at least.

If fan speed was adjusted to match the airflow of a thinner fan, would you expect it to produce less noise or more?

[Paradigm Shifter]

Wow that's super nice! I wonder why Noctua does not do something like that! One thing is that they reuse their usual fans (which also make them easily replaceable) while those fans are very specific.

Those fans just look like they clip on. You could likely rig up any fans you wanted using a few zip ties and maybe some anti-vibration pads.

If fan speed was adjusted to match the airflow of a thinner fan, would you expect it to produce less noise or more?

Less, IIRC.

But the primary advantage of thick fans is improved static pressure.