Correct me if I'm wrong, as of today there is no cooler for the Epyc 9965 that was launched 8 months ago in October 2024. There are liquid-cooled-servers, but these come as a whole. Let me know If you have managed to use Epyc 9965 with a cooler this includes both any new cooler in the future, or even if you have used a non TDP 500 capable cooler what were the results.
is there a Cooler for Epyc 9965 (Default TDP 500W)
- Thread starter fatherboard
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dynatron makes a few:
www.dynatron.co
Server Air Coolers | High-Performance Heat Sink Solutions | Dynatron
Explore Dynatron’s full range of air cooling solutions designed for servers, AI platforms, and industrial systems—offering optimized airflow and thermal reliability across various form factors.
www.dynatron.co
try SilverStone XE360-SP5
they provide no TDP rating as Noctua e.g. because TDP is nothing saying today.
with big silicon chips it is more reasy to cool as with small hotspot ones.
i would also try a 12cm Cooler and swap the FANs with higher RPM ones.
do not buy low min RPM FANs, this results in overheating og the Fins in IDLE, and on load the FANs must ramp to max. for longer time,
that is more
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J12 is the candidate here thought.dynatron makes a few:
Server Air Coolers | High-Performance Heat Sink Solutions | Dynatron
Explore Dynatron’s full range of air cooling solutions designed for servers, AI platforms, and industrial systems—offering optimized airflow and thermal reliability across various form factors.
rated 580W at an ambient temperature of 20°C
so you have to have air conditioning in your room.
edit:
max. 8000 RPM, tell your neighbors beforehand.
I have them, but not for the Zen 5 Epyc 9965 500TDP, just to be used with Zen 4 Epyc 9754 400TDP.
I contacted silverstone directly and they said they have nothing for 500TDP.
These 9965 will be HPC-tortured for weeks in a row and will get only a few hours rest before another round starts, so I don't know if I should risk these expensive 500TDP CPUs with a 400TDP cooler
What worries me is where they say "CPU Socket: Genoa®, Socket SP5"
All cpu coolers were designed for Genoa, non for Turin.
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asked for 600W ?
they stop clocking high at some temp.
you may overthinking this.
modern desktop CPUs like core 14th gen TDP=65W can draw up to 200watts for some time,
but server processors habe more strict TDP borders.
have you thought about VRM cooling ? i guess that will be your more critical problem soon.
Stop this cooler non-sense and do yourself a favor and think about a liquid cooling solution that fits your project. Tons out there ...
PS: If you really go full throttle on a 500W TDP CPU, you better think of 600W cooling performance considering the hot airflow you probably never manage to get rid of with a basic airflow setup in a dense environment.
PS: If you really go full throttle on a 500W TDP CPU, you better think of 600W cooling performance considering the hot airflow you probably never manage to get rid of with a basic airflow setup in a dense environment.
If we're talking about air then It's all about (physics/thermodynamics):
1) heat transfer between CPU contact surface and delivery (pipes)
to
2) heat exchange space (fins) = total surface area
and
3) airflow (+input temperature) over that surface to move heat energy away.
Normally most premium coolers can dissipate wattage way above their declared specification if you provide sufficient extra airflow (given all else being constant or if not then even supplying lower inflow temp) without the need to increase total heat exchange area (fin mods).
One of paths for this conceptual solution was already mentioned above - larger diameter/higher RPM (higher rotational speed) cooler, although there are other ways to achieve the same (e.g. multiple fans, blade shape and count, etc. whatever is needed to grant higher CFM {air volume per time} / higher static pressure).
1) heat transfer between CPU contact surface and delivery (pipes)
to
2) heat exchange space (fins) = total surface area
and
3) airflow (+input temperature) over that surface to move heat energy away.
Normally most premium coolers can dissipate wattage way above their declared specification if you provide sufficient extra airflow (given all else being constant or if not then even supplying lower inflow temp) without the need to increase total heat exchange area (fin mods).
One of paths for this conceptual solution was already mentioned above - larger diameter/higher RPM (higher rotational speed) cooler, although there are other ways to achieve the same (e.g. multiple fans, blade shape and count, etc. whatever is needed to grant higher CFM {air volume per time} / higher static pressure).
some light reading from OP's other posts
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The idea is simple each "machine" looks like a workstation but it has server components, I'll happily take everything from the server world except the lack of space (chassis, rack), so I don't even talk less than 6U that can go vertical as well, and even then not stacked in a rack.
I was forced to split in two phases (due to non-availability of components)
Phase 1: each CPU is in at minimum a 6U e.g. SILVERSTONE RM600 (conveniently vertical as well) -> ideally the future bigger brother of XE360-SP5
Phase 2: move the individual CPUs into Dual CPU motherboards. still in a 6U or 8U, not in a rack -> ideally the future bigger brother of XE360PDD
I'll have to wait for the motherboards to be produced first, and for Silverstone to come up with a bigger case to fit a motherboard that accommodates dual cpu & 48 ram stick motherboard. The ideal is to get a bigger version of this.
The "complete solution" from a "company" actually is not meant for my use case, which is to put the horse power of a server in a workstation space and format. This is why I'm desperate to get AIO style cooling. I want to be able to move each machine separately with wheels to another space in the apartment, yes it's an apartment, a funny one, where some places are way colder than others depending on the season.
When processing, it will be continuous for weeks in a row non-stop including night time, at 100%. So if I go with an 8000rpm air cooling (like the J12) I may be kicked out by the neighbours.
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Well unless you're willing to build your own water cooling setup, you're going to be stuck with two XE360-SP5 AIO type coolers. You'll probably have to upgrade the fans to something with more airflow. If that's not compatible with your living situation then either you'll have to live with the CPUs throttling (which will probably happen regardless of what you do) or you'll have to find a new place for your workstation to live. Sadly you can't have your cake and eat it too.
If you're willing to build a water cooling setup, you'd be able to build something with much more cooling capacity, but that involves a lot of work if you've never done it before.
If you're willing to build a water cooling setup, you'd be able to build something with much more cooling capacity, but that involves a lot of work if you've never done it before.
If I try to set up a custom cooling myself (the hard way), I'm afraid I don't know how to find out if it will handle 500TDP? Silverstone said their stuff handles up to 400TDP, but when I set up one I wouldn't know what TDP it is capable of handling. So even after a lot of hard work, the TDP will be unknown.
You can calculate the tdp with the specs supplied by the heatsink & cpu manufacturer and a thermometer at home:
TDP (Watts) = (tCase°C - tAmbient°C)/(HSF ϴca)
Link:
Edit: Added source link
TDP (Watts) = (tCase°C - tAmbient°C)/(HSF ϴca)
- tCase°C: Optimal temperature for the die/heatspreader junction to achieve rated performance. (cpu spec)
- tAmbient°C: Optimal temperature at the HSF fan inlet to achieve rated performance. (you with your thermomether measuring the ambient temperature)
- HSF ϴca (°C/W): The minimum °C per Watt rating of the heatsink to achieve rated performance. (heatsink spec)
Link:
Edit: Added source link
It wouldn't be unknown, you'd calculate that based on the radiators you choose as many manufacturers list this in the specs or you can calculate it. It's totally possible to dissipate 1000+ watts with 3 good radiators. It's not an easy task by any means though, if you're considering this you've got a lot of reading ahead of you. Maintaining a water loop is not the easiest task either.
I've built quite a few loops and it still takes much more time and I run into more issues than I anticipate. It's a labor of love more than anything.
Why can't you take a simple SP5 watercooling block, put some tubes on it, connect them with a good pump and add a Mo-Ra III or IV to it. Fix the Mo-Ra to the case. A small Mo-Ra IV 400 can dissipate 1200W. You could even transport the whole system.
Watercooling looks as simple as just connecting things, but there is leak testing, filling, maintaining, etc. It's not a simple plug and play thing. Then fitting a 4x200mm fan radiator (or 9x120mm) to a case adds it's own difficulty. If it were me, doing 3x radiators with a couple of pumps and a res would be the solution, but I've done a few builds before.