rog is working on hudimmrog engineer bing also shared a way to turn udimm into hudimmfacebookhttps://t.co/YRfdVsZgV8 https://t.co/j9n9W3uWUg pic.twitter.com/EfND0LGhJ5 April 18, 2026
Follow Tom's Hardware on Google News , or add us as a preferred source , to get our latest news, analysis, & reviews in your feeds.
Hassam Nasir is a die-hard hardware enthusiast with years of experience as a tech editor and writer, focusing on detailed CPU comparisons and general hardware news. When he\u2019s not working, you\u2019ll find him bending tubes for his ever-evolving custom water-loop gaming rig or benchmarking the latest CPUs and GPUs just for fun. ","collapsible":{"enabled":true,"maxHeight":250,"readMoreText":"Read more","readLessText":"Read less"}}), "https://slice.vanilla.futurecdn.net/13-4-20/js/authorBio.js"); } else { console.error('%c FTE ','background: #9306F9; color: #ffffff','no lazy slice hydration function available'); } Hassam Nasir Social Links Navigation Contributing Writer Hassam Nasir is a die-hard hardware enthusiast with years of experience as a tech editor and writer, focusing on detailed CPU comparisons and general hardware news. When he’s not working, you’ll find him bending tubes for his ever-evolving custom water-loop gaming rig or benchmarking the latest CPUs and GPUs just for fun.
Notton Half DIMM is such a dumb idea… So you turn your 128-bit mem bus into a 96-bit Say you're using 6000MT/s with 128-bit, that equals to 96GBps bandwidth Drop it to 96-bit and you're down to 72GBps Or, you could use 4800MT/s with 128-bit, and get 76.8GBps. And if you do upgrade the RAM on that, what are you going to do with the single stick of HUDIMM? Pair it with another HUDIMM? Congrats on dipping down to a 64-bit mem bus and running slower than DDR4-3200 in 128-bit. What's even funnier is that the HUDIMM shown by Asrock is running at 4800MT/s. It's even slower than the example I gave and only getting you 57.6GBps. That's the same bandwidth as DDR4-3600 in dual channel (128-bit). Reply
Findecanor Didn't the 'D' in "DIMM" already stand for them having dual 32-bit busses, because its predecessor ("SIMM") had only a single 32-bit bus ? "Half Dual" would then become a weird way to write "Single". I will call these "HUmbug DIMM" from now on :p Reply
Jokersona …and how much will this save on costs? I can not imagine it will be a lot. Reply
usertests Jokersona said: …and how much will this save on costs? I can not imagine it will be a lot. If you are targeting the same capacity, not much at all. This is a fiasco. Reply
torbjorn.lindgren Findecanor said: Didn't the 'D' in "DIMM" already stand for them having dual 32-bit busses, because its predecessor ("SIMM") had only a single 32-bit bus ? Nope! The Dual part comes from having different connectors on each sides of the PCB, as opposed to SIMM where the front and back connector are connected together. IE, they connect via dual connector edges vs SIMMs that has a single redundant set of edge connectors. The fact that early 30-pin SIMM had 8 or 9-bit (parity) wide buss shows that your interpretation isn't correct, the 72-pin 32-bit SIMMs came out later. And 30-pin SIMM was still very much being sold when the first DIMMs came out (similar to how DDR4 memory is still being sold). Reply
bit_user Notton said: Half DIMM is such a dumb idea… So you turn your 128-bit mem bus into a 96-bit That's only if you do a half DIMM + a full DIMM. I think the point of that example was to show that single-subchannel DIMMs provide a wider range of configuration options. Realistically, what's most interesting to manufacturers about this is the potential of having just a single 4 GB or 6 GB DIMM. Prior to this, there was no way to hit those capacities with DDR5. TBH, I'm not sure exactly how 8 GB DIMMs worked. Notton said: Or, you could use 4800MT/s with 128-bit, and get 76.8GBps. Costs more. Not everyone needs that much capacity. Although, to be honest, I think less than 16 GB isn't a great proposition for consumers. But, this provides a better way to hit 12 GB (i.e. 96-bit) than the old way of doing just a single 12 GB DIMM at 64-bit data width. Notton said: And if you do upgrade the RAM on that, what are you going to do with the single stick of HUDIMM? Pair it with another HUDIMM? Congrats on dipping down to a 64-bit mem bus and running slower than DDR4-3200 in 128-bit. Most boards sold still support 4 DIMMs. So, you could double-up the two HUDIMMs in the same channel and pair them with one or two regular DIMMs in the other channel, still giving you 96-bit data width. Reply
bit_user torbjorn.lindgren said: Findecanor said: Didn't the 'D' in "DIMM" already stand for them having dual 32-bit busses, because its predecessor ("SIMM") had only a single 32-bit bus ? Nope! The Dual part comes from having different connectors on each sides of the PCB, as opposed to SIMM where the front and back connector are connected together. IE, they connect via dual connector edges vs SIMMs that has a single redundant set of edge connectors. Well, here's how Wikipedia explains it: DIMMs (Dual In-line Memory Module) were a 1990s upgrade for SIMMs (Single In-line Memory Modules) as Intel P5-based Pentium processors began to gain market share. The Pentium had a 64-bit bus width, which would require 32-bit memory modules installed in matched pairs in order to populate the data bus. The processor would then access the two 32-bit SIMM modules in parallel. DIMMs were introduced to eliminate this disadvantage. The contacts on SIMMs on both sides are redundant, while DIMMs have separate electrical contacts on each side of the module. This allowed them to double the SIMMs 32-bit data path into a 64-bit data path. The name "DIMM" was chosen as an acronym for Dual In-line Memory Module symbolizing the split in the contacts of a SIMM into two independent rows.That sounds to me like @Findecanor is basically right. The Wikipedia description (which cites several sources I omitted) sounds like it's basically just combining two SIMMs onto one PCB. However, I don't know whether those SIMMs (or both sides of the early DIMMs) were truly independent channels. They could've been on the same address bus. It seems unlikely to me that CPUs of that vintage had multiple independent memory channels. I think that probably came with the move up from 64-bit to 128-bit memory interfaces. Reply
thestryker To me this is just an ominous sign as to how much longer the memory shortages are expected to go. Nobody would be developing this technology if the end was in sight. Reply
bit_user thestryker said: To me this is just an ominous sign as to how much longer the memory shortages are expected to go. Nobody would be developing this technology if the end was in sight. Yeah, I view it with mixed feelings. On the one hand, PC makers are desperate and I can understand their plight. On the other hand, we know too many of them offer products that exploit unwitting consumers with needlessly poor performance for the price. I guess I'd rather see this development than to have more PC makers go out of business and fewer options for consumers. Also, at least people who end up with these products will have the option to upgrade to full-width DIMMs, if/when the DRAM market returns to sanity. Reply
palladin9479 This is dumb, just use a single DIMM and get the exact performance and size. Reply
Key considerations
- Investor positioning can change fast
- Volatility remains possible near catalysts
- Macro rates and liquidity can dominate flows
Reference reading
- https://www.tomshardware.com/pc-components/ddr5/SPONSORED_LINK_URL
- https://www.tomshardware.com/pc-components/ddr5/new-hudimm-memory-specification-debuts-with-goal-of-lowering-prices-during-ram-shortages-a-new-cheaper-memory-standard-featuring-only-one-subchannel-per-stick-aimed-at-budget-pcs#main
- https://www.tomshardware.com
- Bambu Lab overtakes Creality as the world's top-selling budget 3D printer brand — resurgence in 3D printer market fueled by budget options
- NVIDIA and Partners Showcase the Future of AI-Driven Manufacturing at Hannover Messe 2026
- Nvidia RTX 3060 comeback in 2026 could alleviate soaring GPU prices and memory shortages — rumored RTX 5050 9GB abruptly shelved amid speculation
- $20,000 in 32GB RAM sticks saved from the dumpster are now worth a fortune — seventy-two DDR4-2666 ECC RDIMMs were about to turn into e-waste
- Nvidia RTX 3060 comeback in 2026 could alleviate soaring GPU prices and memory shortages — rumored RTX 5050 9GB abruptly shelved amid speculation
Informational only. No financial advice. Do your own research.