Can anyone confirm if they had any memory recognition issues or boot up memory issues if 8 Dimms of 16GB 3200MHz ECC Udimms were installed on a Gigabyte Designare TRX40 with a Threadripper 3960X ?
more relevant to me, was it still possible to maintain 3200MHz with 8 Dimms?
Currently, I have my TR 3960X coupled with 4 Dimms of 16GB 3200MHz ECC Udimms (Kingston KSM32ED8/16HD) and I would like to expand from 64GB to 128GB by buying additional modules of the same existing ones.
I am aware of the recommended values in the table attached, but I don’t want to buy 32GB modules to maintain 3200MHz unless I have to.
I had a similar experience. I even had mixed the same part number of modules from G.Skill that were purchased 5 years apart and they wouldn’t work together in one system.
Most times I could get almost anything working with bios updates or reducing clock/increasing latency but that seems to not help with the original poster’s problem.
2DPC (2 DIMMs per channel) configurations always put heavy load on the memory controller if the modules are dual rank. Even RDIMMs (which are really good at keeping high specs with high capacity) have 2933MT/s on EPYC if you use all 16 slots on the server board.
But those nice RDIMMs are reserved for TR Pro and Server platforms . It’s really only about market segmentation to not support RDIMMs everywhere. Because “if you want lots of memory, check out our awesome Pro and server products!”
It’s a tough call on whether to fill all chennels or use higher capacity modules and have easier and probably better expansion later on.
4 Channels of 2667 is still way more bandwidth than your average consumer memory although 2 channels of DDR5 achieve parity nowadays, but that’s without ECC
Thank you for your reply. Interesting insight into RDIMMs/LRDIMMs.
Yes, sadly, the segmentation is artificial.
I do finite element analysis FEA. I do benefit significantly from more memory channels and ECC RAM, PCIE lanes etc. The consumer CPUs are limited to only 128gb and ECC support is sparse.
Yes, I do use it to generate a small income in small engineering projects, but I certainly don’t make enough to justify the Pro version such as the 24 core entry model 5965WX. In Australia this 5965WX is listed for $4,299 Australian dollars. This is an insane amount of money compared to what I paid for the 24core TR 3960X non pro, $1,800 AUD which does support ECC well.
I won’t by buying the 5965WX, because it’s not a good value proposition for my business and it seems to be only 15%~20% faster for FEA loads and FEA loads are only 5% of the up time.
The price gap between the high end desktop CPUs and the entry level “Pro” CPUs is now astronomical. Something is not right.
. It’s really only about market segmentation to not support RDIMMs everywhere. Because “if you want lots of memory, check out our awesome Pro and server products!”