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dhirota
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Re: Threadripper

Post by dhirota »

dhirota wrote:
Mon Feb 10, 2020 2:41 am
smacl wrote:
Sun Feb 09, 2020 10:45 am
..... Not sure if you'll get more than 256GB of RAM into it at this stage as AMD want to differentiate between the HEDT and server market with Epyc.
After a little searching found registered ECC RDIMM
DDR4-2666-32GB sticks for $101.00 each (8X32GB)=$ 808 new
DDR4-2933-32GB sticks for $167.13 each (8X32GB)=$1,336 new
DDR4-3200-32GB sticks for $175.00 each (8X32GB)=$1,400 new
DDR4-2933-64GB sticks for $329.56 each (4X64GB)=$1,318 new

....

Tomorrow, I need to check if ASUS tech support says that it is OK to use the 64GB sticks to 512GB total RAM size. I need to also check my source for refurbished RAM sticks for 32GB and 64GB ECC RDIMM size.
Shane

Looks like you are right about AMD differentiating between HEDT and Server total RAM. Since receiving my MB and registering the serial number with ASUS, I was able to get personal answers about using 64GB RAM sticks to achieve 512GB in the 8 RAM slots. NO, use at own risk. As we all know it is best to use the largest RAM sticks available for future expansion. I was planning to use 4X64GB to achieve the 256GB maximum as indicated by Puget Systems and BOXX for their systems. I will now use the 8X32GB, since I have $5,000 invested in the CPU+MB and will not risk it.
Dennis Hirota, PhD, PE, LPLS
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dhirota
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Re: Threadripper

Post by dhirota »

With new technology there are many issues that need to be resolved even when they say it will work. Depending on timing, purchasing may take one or two days, but DIY still requires integration and testing to see if it will boot with the OS that you are planning to use. From my last week of problem solving, a significant suggestion for future DIYself people is to check on YouTube search for people that have tested your proposed configuration of CPU, MB, RAM, case, GPU, operating system, and application software.

Two months ago there were several forums and YouTube videos that discussed that AMD CPUs 3960X, 3970X would have correctable problems with linux and TRX40 MB. Unfortunately, I did not see that until several days ago. It seems that linux problems are not solved as quickly because of the limited number of people using linux with the new hardware. Because it is President's Day in the USA and I used another workflow to build the OS and application software, it seems to be working except for the overclocking not in place yet.

RAM is still a problem since the 256GB (8X32GB) ECC did not work, so I am trying to get what is listed on the ASUS QVL list instead of a cheaper cost. I have 128GB (8X16GB) installed from my spare RAM box. It is not enough RAM to run NavVIS SiteMaker since it is looking for more RAM, and is using SWAP space with the 128 threads.

Below are a few screen shots of 128 threads running in Ubuntu 18.04.3

Screenshot from 2020-02-17 12-33-23_SMALL.jpg

Screenshot from 2020-02-17 12-42-42_SMALL.jpg

While doing this processing, the 3990X was running at 43 to 67 degrees C, using water cooling.

More news later, when I build the Windows 10 Workstation version of this system.
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Dennis Hirota, PhD, PE, LPLS
[email protected]

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