Samsung envisions 1TB DDR5 modules to arrive in 2024, DDR5-7200 to hit the market in 2025.
Samsung: 1TB DDR5 RAM in 2024, DDR5-7200 in 2025 : Read more
Samsung: 1TB DDR5 RAM in 2024, DDR5-7200 in 2025 : Read more
I would assume the server vendors are buying all the L/RDIMMs right now so they will have enough stock at launch. ECC UDIMMs are really only used in low end embedded servers from what I've found. Perhaps the on-die ECC will be enough.Does anyone know why DRR5 ECC DIMMs are still nearly nonexistent (and seemingly not really being discussed either)? I mean DIMMs that have sideband ECC, I'm addition to the on-die ECC that all DDR5 has.
Are the big memory players just waiting until DDR5 server chips (Sapphire Rapids and/or Genoa) are shipping in bulk? I would have thought you'd want the memory to be available before that happens.
Sapphire Rapids has been available for a while for some of Intel's major customers. As Intel said, the delay for SR is for fully functional CPU's. Not all their customers need that, and are fine using what is working. There's no reason for memory makers to sell DDR5 ECC DIMMS to retail when there are no "DIY" platforms for sale that can use it. They're selling what they produce directly to the companies that need it.Does anyone know why DRR5 ECC DIMMs are still nearly nonexistent (and seemingly not really being discussed either)? I mean DIMMs that have sideband ECC, I'm addition to the on-die ECC that all DDR5 has.
Are the big memory players just waiting until DDR5 server chips (Sapphire Rapids and/or Genoa) are shipping in bulk? I would have thought you'd want the memory to be available before that happens.
Hmm, I was under the impression that the majority of L/RDIMMs were also ECC, such that most servers used ECC. Don't really have a source for that though, I could be mistaken.I would assume the server vendors are buying all the L/RDIMMs right now so they will have enough stock at launch. ECC UDIMMs are really only used in low end embedded servers from what I've found. Perhaps the on-die ECC will be enough.
Do you have a source for SPR already being widely available? There was a bit about them planning to start shipping some chips for the Aurora supercomputer near the end of last year, but nothing but reports of delays since. Even Intel's own Xeon page makes makes no reference to 4th gen (SPR) processors.Sapphire Rapids has been available for a while for some of Intel's major customers. As Intel said, the delay for SR is for fully functional CPU's. Not all their customers need that, and are fine using what is working. There's no reason for memory makers to sell DDR5 ECC DIMMS to retail when there are no "DIY" platforms for sale that can use it. They're selling what they produce directly to the companies that need it.
I've never seen an L/RDIMM that wasn't also ECC. Granted I'm sure they were a thing a some point in time. We just don't say I need an ECC RDIMM since the RDIMM already has ECC.Hmm, I was under the impression that the majority of L/RDIMMs were also ECC, such that most servers used ECC. Don't really have a source for that though, I could be mistaken.
I noticed the same thing. Once Supermicro's W680 boards started shipping, I started pricing an upgrade for my 10-year-old workstation. This was the first stumbling block I hit.Does anyone know why DRR5 ECC DIMMs are still nearly nonexistent (and seemingly not really being discussed either)?
No. The on-die ECC is low-density and only used to paper over DDR5's higher intrinsic error rate due to smaller cell sizes, longer refresh intervals, and maybe lower-voltage.Perhaps the on-die ECC will be enough.
W680 boards launched back in like Feb. I don't know when they actually started becoming available, but it should be at least a few months, now.There's no reason for memory makers to sell DDR5 ECC DIMMS to retail when there are no "DIY" platforms for sale that can use it.
Amazon is using DDR5 in Graviton 3 and we know there are some Sapphire Rapids customers. I think these big hyperscalers are probably absorbing all the ECC DDR5 currently produced.Hmm, I was under the impression that the majority of L/RDIMMs were also ECC, such that most servers used ECC.
It's not. It's just being made available on a special-arrangement basis to big customers who are either beta-testing it or who don't care about the specific errata in earlier spins.Do you have a source for SPR already being widely available?
Or start treating memory a bit like SSDs: failures are normal up to some number of defective pages per DIMM before RMA is warranted, log those bad pages in SPD-EEPROM upon detection and confirmation, then let the OS exclude them from its memory map.The main thing about this announcement that boggles my mind is the cost of replacing a defective DIMM. At these kinds of prices, I'd imagine manufacturers are certainly going to be replacing the defective packages on returned modules and re-selling them as refurb (or maybe taking a page out of HDD makers' playbook and shipping them as warranty replacements).
Depends on the application. CXL makes sense when your active data set is a subset of relatively fresh data worth keeping somewhere in memory. If you go into supercomputer simulation territory where the PB-scale data set gets processed at practically every step, there is little stale data that can be shifted to slower memory without degrading performance and we'll still need CPUs with either fast low-latency external memory or a lot more on-package memory than we have today.I also have to wonder about what CXL is going to do to the server memory landscape. The main benefit that Samsung gets from such high densities is going to be watered down with CXL.mem devices, because there won't be the same constraints on physical size or quantity as we have with directly-connected memory. Nor will they need to support such high speeds.