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I got mine from tugm4470 on ebay. If you can't find it on his site send him a message. Note that I did not get great results with this and it almost damaged my system.

So the issue returned and got progressively worse. The machine started to shutdown once per day again and exhibited the same behavior as described above. The previous actions were not fixes but instead just decreased the probability of failure. GPT 5.2 suggested that my PSU (EVGA SuperNOVA 1000...

I feel your pain! I got lucky. I bet I would have issues if I installed one of the parts with more cores. My machine is still running with no issues so I think I will stick with the dual 7302's. I learned my lesson as well.

This looks like a product of one of my disasters that I was able to recover from: https://forums.servethehome.com/index.php?threads/fixing-a-broken-pin-on-a-h11dsi-supermicro-motherboard.41381/#post-391510

I have a Threadripper machine that occasionally (but regularly) shuts down under very light (web browsing) or heavy loads with the red DRAM light on. When the shutdown occurs the fans blast at full speed and I cannot shut the machine down with the power button (I have to pull the plug). I...

I used tugm4470 to build a research cluster for CFD (Epyc 7302 and 7f52 cpu's + H11DSi mobo's). I have been very pleased with product quality and surprisingly fast delivery. Also, tugm4470 prices are hard to beat especially relative to the cost of comparable Amazon AWS services if you have...

I had spontaneous restart issues when bench testing this board with high TDP CPUs (7f52) without adequate airflow. Disabling Simultaneous multithreading in the BIOS was a quick fix that allowed me to finish bench testing. Once I installed the mobo with several Noctua high RPM fans and Noctua...

I usually update the BIOS if the board is used. This creates a perception of improved security but I am not sure how much security risk is reduced.

There was an option for sleeping when battery power is in use. Deactivating this seems to have fixed the problem, which is odd since the machine hasn’t had to rely on battery backup power from my ups. Looks like I don’t have to fudge with grub settings.

I built several Epyc Workstations using H11DSi mobos, 7f52 high frequency Epyc processors and PopOS. These machines are fantastic for the CFD work I do. However, after some of the machines have been on for several days the usb ports sometimes stop working (as if they went to sleep). I can ssh...

I had very similar issues with a H11DSi mobo and two 7f52 CPU’s purchased from tugm4470. However, after much trial and error I was able to resolve the issue. In a nut shell, I think it was a cooling problem. Disabling SMT was a quick fix that allowed me to improve cooling. I eventually got the...

Thank you for your insights! So let me make sure I fully understand your comment. Let's say we use the H12DSi-NT6 Supermicro MOBO for this example. Since this MOBO was designed for Rome and a single upgrade step to Milan, Milan is end of the line and and there is less incentive for data centers...

For the 7302 and 7f52 Epyc processors, which are great for distributed CFD computingthe new versions are 5-10 more than used equivalents as sold by tugm4470. I do sometimes get a little worried about used MOBO’s from any vendor in terms of security. I usually pay extra for new MOBO’s for...

Here is a quick update on this thread. I decided to use NEMIX for most of my project and tested dozens of 16GB sticks (~$32-35 per stick). I have not encountered any memory issues even while running very high workloads over multiple days and performance seems comparable to my Samsung RAM with...

I bought around a dozen used Epyc Rome CPUs from tugm4470 on eBay. All came with this stamp, have worked very well and are equivalent as far as I can tell to CPUs purchased new from US vendors. If you clean your CPU with alcohol before applying thermal paste this stamp will come right off. I...

I had spontaneous restart issues with popOS on a machine with a Supermicro H11DSi mobo and two high frequency 16 core Epyc 7f52 processors. A quick fix was to disable Simultaneous Multithreading (SMT) in the BIOS. Ultimately, the issue was resolved long term and I was able to activate SMT by...

I have tested dozens of sticks @Newegg:MEM-DR416L-HL01-ER32 16GB Memory Compatible With Supermicro by NEMIX RAM MEM-DR416L-HL01-ER32 16GB Memory Compatible With Supermicro by NEMIX RAM - Newegg.com Quality is better than expected given the cost ($35). I have not encountered any memory issues...

I am playing around with fan speed and temperatures (thank you for getting me here!) using the following workflow in the console interface: enable config terminal fae mlxi2c set-fan /FAN/FAN 1 <percent> fae mlxi2c set_fan /PS1/FAN 1 <percent> fae mlxi2c set_fan /PS2/FAN 1 <percent> The results...

Putty on Ubuntu is easy to install, and the default inputs worked without modification (dev/ttyS0, baud rate = 9600 etc.) so the tool showed me how to make this work. I can get minicom and screen to work now but Putty just made sense to me. I am playing with ltrace now and trying to understand...

I got in. Here are the details.