I impulse bought a supposedly cheap 9734 the other day, already ordered motherboard ( ASRock Rack Server Motherboard BERGAMOD8-2L2T) and memory, I just realized I was missing a cooler but a quick search online didn’t return anything. Noctua and Artic don’t even have models that support it. Can you recommend something?
I’ll use a full tower with plenty of clearance and fans so pretty much anything that fits the socket will do.
Thanks!
The cooler is the beginning of a series of problems for you with 9004 EPYC
Best platform out there in my opinion, but solid learning curve.
As for coolers:
Odd you’re not getting hits. Haven’t worked with these personally but some SP5 options for 340+ W TDP I’m aware of are
Supermicro also does SP5 air but I’m not sure if their coolers are specific to their boards. In water, Alpahcool ES, Dynatron L32, Silverstone XE360.
I do
long story short: Dynatron
No idea how they have 8 DIMMs on that board when the CPU has 12 memory channels and we lost 20-30% CPU benchmark scores not having all channels populated.
yeah, I couldn’t find a single slot 12 DIMM motherboard. In fairness, I didn’t look that hard, I panicked after buying the EPYC so I looked at newegg and a couple other places only and this ASRock looked pretty good although I couldn’t find reviews online. But having watched Wendell’s videos about previous iterations I guessed it was safe enough. We’ll see…
We’ve done 9004 builds with the SuperMicro H13SSL-NT and Gigabyte MZ33-AR0 boards.
The SuperMicro is better for full length GPU’s that hang low over the board
Gigabyte is better for large RAM configurations
Just curious about this, what kind of problems? 
Starting with memory
EPYC 9004’s are VERY picky about having matching DIMMs and clock speeds
Depending on how you are using the workstation, what drives you use and pass through requires several settings be set correctly.
It’s a server CPU so all the options in the MoBo are exposed.
Real tedious to get all the features you want and everything working properly if you are coloring outside the lines at all.
If you plan on running Windows, order a TPM 2.0 module now.
I only bought 4 DIMMS because I have a suspicion that the CPU won’t work, but if it does I’ll get 4 more of the same brand, don’t have the brand handy right now.
maybe as a VM but I want to install Proxmox on it and run in general Linux VMs. Since it has Zen4c cores I don’t think it will be a good workstation anyways
regretfully, but I guess as expected because of the price, the cpu didn’t post so I had to return it.
sorry to hear they did not post.
There are other ebay vendor choices and I am glad to point you to the very competitively priced and reputable vendors that exist.
ON HEATSINKKS:
The cool server heatsink, (3 versions) needs to be the one with the full copper plate covering the CPU,
2 out 3 of the ones sold by them do not cover the whole cpu with the transfer plate.
Unfortunately all listed under the same sale items/same picture, but different products.
I ordered 12 to get 4 that were right, and returned , and then had to modify them anyhow.
ALL other air heatsinks are NOT enough, please review this thread to understand more and maybe sone beneficial details,
Get this version ONLY (picture)
the other versions have 30% less cooling fins, and 44% less coverage of the actual cpu heatsink plate
Lastly, the copper plate on the other two versions is 2mm thinner (not as thick)
visually if you go by pics, make sure the radiator is 120mm of fins wide and 120mm of fins long.
lastly the upper cover plate is black steel (not gray aluminum) has no writing on it and is secured by two Torx 15
FANS:
Use Phantek T-30 120
set the small switch in the back of each fan to the advanced mode
300Rpm to 3000rpm
use bios fan curve to manage fan speed
I can send you the optimized fan curve
these builds are very doable, work very well, set records and are very stable… when done right
thanks! I’ll take a look at that and let you know if I have specific questions.
In case it is helpful to know I have the Cool server cooler (ordered on Ebay - “Cool server cooler for 9654”) on my 9654 Epyc build.
I’m using this thing in my office and it does a really nice job. The CPU maxes out at like 73c and what surprises me the most, it ain’t the loudest machine I own 
VRMs on the other hand are slightly too high for my taste, reaching 86c on a hot day. It is a Supermicro motherboard in a desktop case so I guess it shouldn’t surprise me that much.
Wendell did a video about the arctic freezer 4u-sp5. but i have yet to be able to find it anywhere. its not listed any of the places where they say it should be last i looked.
this thread is useful for alternative coolers though. so i guess theres that.
I have several. The fans, new in box, are worthless and have issues, the build quality is suspect on the coolers. Aluminum fins just slide right off the heatpipes,
The heatpipes, and bend area, misses the outer edge of the internal chiplets. as there is no plate, the pipes bend off before the critical contact area is reached
I tried running these for SP5, but a poor product
I tried running the SP3 and also a poor product, so many quality control issues
Advice,
stay away for now an or until they resolve the build quality issues
thats a shame to hear. but good to know. its a shame that noctua has no intention of introducing SP5 coolers, according to my email with support.
but management hasnt approved this server build, so i have time to find an alternative.
@JayVenturi is THE guy when it comes to cooling SP5
We still slap Dynatrons onto the 225 watt TDP SKUs we push out for deployments with the fan cranked to max, but for the 400 watt skus, we’ll be following his recommendations.
The coolserver M99 doesn’t seem to exist on their website. On AliExpress, I see M98 that looks almost like yours but doesn’t look like copper on bottom, and M99 but it has two sets of fins and fans, very different… Does anyone have a model number or link to the correct heatsink? Thanks!
arctic for sp5 is my go-to now. perfect for 4u cases.
