#LPCAMM

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CUDIMM in Action: Case Studies and Practical Applications

The CUDIMM Standard Will Make Desktop Memory Much Robust and a Little Smarter

While the new CAMM and LPCAMM memory modules for  laptops have attracted notice in recent months, the PC memory sector is experiencing changes beyond mobile. The desktop memory market will get a new DIMM type dubbed the Clocked Unbuffered DIMM to increase DIMM performance. At this year’s Computex trade expo, numerous memory makers displayed their first CUDIMM products, offering a glimpse into desktop memory’s future.

Clocked UDIMMs and SODIMMs are another answer to DDR5 memory‘s signal integrity issues. DDR5 allows for fast transfer rates with removable (and easily installed) DIMMs, but further performance increases are running into the laws of physics when it comes to the electrical challenges of supporting memory on a stick, especially with so many capacity/performance combinations today. While these issues aren’t insurmountable, DDR5 (and eventually DDR6) will need more electrically resistant DIMMs to maintain growing speed, which is why the CUDIMM was created.

CUDIMMs, standardised by JEDEC earlier this year as JESD323, add a clock driver (CKD) to the unbuffered DIMM to drive the memory chips. CUDIMMs can improve stability and reliability at high memory speeds by generating a clean clock locally on the DIMM rather than using the CPU clock, as is the case today. This prevents electrical issues from causing reliability issues. A clock driver is needed to keep DDR5 running reliably at high clockspeeds.

JEDEC recommends CUDIMMs for DDR5-6400 speeds and above, with the initial version covering DDR5-7200. On paper, the new DIMMs will be drop-in compatible with existing systems, using the same 288-pin socket as the regular DDR5 UDIMM and allowing a smooth transition to higher DDR5 clockspeeds.

CUDIMMs = Faster DDR5

High-clocked memory subsystems struggle to preserve signal integrity, especially over long distances and with many interconnections (e.g., multiple DIMMs per channel). Since UDIMMs are dumb devices, the memory controller/CPU and motherboard have traditionally carried this load. However, CUDIMMs will make DIMMs intelligent and assist maintain signal integrity.

Clock drivers (CKDs) accept base clock signals and regenerate them for module memory components, which is the main change. CKDs buffer and amplify the clock signal before driving it to DIMM memory chips. CKDs use signal conditioning characteristics including duty cycle correction to reduce jitter and clock signal timing fluctuations.

Another important CKD function is minimising clock skew, or the difference in clock signal arrival times at various components. The CKD synchronises memory chips and DIMMs by matching propagation delays for each clock path.

Phase adjustment lets CKD match the clock signal to component timing needs, which requires more work from the memory module builder. Many memory module makers have yet to demonstrate their CKD-enabled devices since they are still learning the technology. As a scaled-down version of the Registered DIMM (RDIMM), which has been used in servers for years and is the only DDR5 DIMM supported by Intel and AMD’s server (and workstation) CPUs, embedding clock drivers in DIMMs isn’t a novel notion.

RDIMMs buffer the command and address buses along with the clock signal, but CUDIMMs just buffer the clock signal. In that sense, CUDIMMs are half-RDIMMs.

While some CPU designers would be thrilled if all systems employed RDIMMs (and ECC), consumer PC economics favour cheaper and simpler solutions where available. A JEDEC-standard CKD has 35 pins, about half of which are voltage/ground pins. CKDs increase to DIMM construction costs, but they are purposefully cheaper than RDIMMs.

CKDs will be available in all JEDEC DDR5 memory form factors. Clocked SODIMMs, CUDIMMs, and DDR5 CAMM2 memory modules will need clock drivers.Since memory frequency determines the need for clocked DIMMs, CUDIMMs and their other variants are backwards compatible with DDR5 systems and memory controllers. So CUDIMMs use the same 288-pin DIMM slot as DDR5 DIMMs.

In PLL Bypass mode, a CUDIMM can run a clock signal via its CKD buffers or bypass them. Bypass mode is only supported up to DDR5 6000 (3000MHz), hence JEDEC complaint DIMMs will use CKD mode (Single or Dual PLL) at DDR5-6400 and higher. A CUDIMM can bypass a slower/older DDR5 memory controller, while DIMMs without a CKD can’t reach higher speeds (at JEDEC-standard voltages and timings).

CUDIMMs, CSODIMMs at Computex

G.Skill, TeamGroup, and V-Color displayed CUDIMMs and CSODIMMs at Computex. Memory vendors aren’t revealing details because these new DIMMs accompany new systems. However, because they displayed the hardware, don’t be shocked if they enter production systems (and retail shelves) shortly.

While Biwin still sells high-performance devices under the Acer Predator brand, enthusiast-grade memory modules are a newer product. However, its 16 GB and 32 GB modules may operate at 6400–8800 MT/s, which is faster than’regular’ enthusiast-grade DIMMs. These devices will launch in September.

G.Skill, a longtime enthusiast memory vendor, showed their Trident Z5 CK CUDIMMs at Computex. The company did not highlight their results, maybe because it is still perfecting its CKD-enabled goods and not establishing records. Finally, G.Skill has shown a substantially overclocked system running at DDR5-10600 using ordinary DDR5 modules, thus early CUDIMMs are less impressive.

At the trade event, V-Color displayed CUDIMMs and CSODIMMs, showing that it is taking advantage of CKD chips for high-performance memory. The business plans to sell 16GB and 24 GB CUDIMMs with performance bins between 6400 MT/s and 9000 MT/s at 1.1 V–1.45 V. This is supposed to demonstrate the benefits of clock unbuffered memory modules, as 9000 MT/s is faster than any widely available enthusiast-class memory kit.

Four of many high-performance memory module providers showed CUDIMMs at Computex. Only two talked about CUDIMM performance (TeamGroup’s demonstration seemed incomplete). Since the JEDEC standard has been in place for about half a year, they will soon be joined by the many PC memory providers.

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A Samsung revelou seus novos módulos de memória LPCAMM que podem atingir velocidades de até 7,5 Gbps em um design de grave consumo de vigor e formato pequeno. Módulos de memória LPCAMM da Samsung vão invadir a indústria de laptops com velocidades mais rápidas e menor pegada A Samsung, uma vez que outros fabricantes, está seguindo o padrão CAMM com sua própria oferta de grave consumo de vigor do setor. Leste novo módulo de memória é rotulado uma vez que LPCAMM (Low-Power Compression Attached Memory Module) e possui memória LPDDR5x semelhante ao que vimos em vários designs. Enviado de prensa: Samsung Electronics Co., Ltd., líder mundial em tecnologia de memória avançada, anunciou hoje que desenvolveu o primeiro formato de módulo de memória anexada de compressão de baixa potência (LPCAMM) da indústria, que deverá transformar o mercado DRAM para PCs e laptops - e potencialmente até mesmo data centers. O desenvolvimento inovador da Samsung para seu LPCAMM de 7,5 gigabits por segundo (Gbps) concluiu a verificação do sistema por meio da plataforma Intel. Historicamente, PCs e laptops usaram convencionalmente DRAM LPDDR ou So-DIMMs baseados em DDR. Embora o LPDDR seja compacto, ele fica permanentemente conectado à placa-mãe, dificultando sua substituição durante reparos ou atualizações. Por outro lado, os So-DIMMs podem ser conectados ou desconectados facilmente, mas têm limitações de desempenho e outros recursos físicos. O LPCAMM supera as deficiências tanto do LPDDR quanto dos So-DIMMs, atendendo à crescente demanda por dispositivos mais eficientes, porém compactos. Por ser um módulo removível, o LPCAMM oferece maior flexibilidade para fabricantes de PCs e laptops durante o processo de produção. Comparado ao So-DIMM, o LPCAMM ocupa até 60% menos espaço na placa-mãe. Isto permite uma utilização mais eficiente do espaço interno dos dispositivos, ao mesmo tempo que melhora o desempenho em até 50% e a eficiência energética em até 70%. Os recursos de economia de vigor do LPDDR tornaram-no uma opção simpático para servidores, uma vez que poderia melhorar potencialmente a eficiência do dispêndio totalidade de operação (TCO). No entanto, o uso de LPDDR pode produzir dificuldades operacionais, uma vez que a premência de substituir toda a placa-mãe ao atualizar as especificações DRAM de um servidor. A LPCAMM oferece uma solução para esses desafios, criando um potencial significativo para se tornar a solução preferida para futuros data centers e servidores. “As vantagens de eficiência energética e capacidade de reparo do LPCAMM fazem deste novo formato um divisor de águas no mercado atual de PCs”, disse o Dr. Dimitrios Ziakas, vice-presidente de memória e tecnologia IO da Intel. novo padrão que permite o ecossistema de PCs clientes e abre caminho para adoção e inovação futuras em segmentos de mercado mais amplos." “Com a crescente demanda por soluções inovadoras de memória que abrangem supino desempenho, grave consumo de vigor e flexibilidade de fabricação em vários campos, espera-se que a LPCAMM ganhe ampla adoção em PCs, laptops e data centers”, disse Yongcheol Bae, vice-presidente executivo de memória. Equipe de planejamento de resultado da Samsung Electronics. "A Samsung está comprometida em buscar ativamente oportunidades para expandir o mercado de soluções LPCAMM e em colaborar estreitamente com a indústria para explorar novas aplicações para seu uso." através da Samsung Semiconductor O LPCAMM deverá ser testado usando sistemas de próxima geração com grandes clientes leste ano, e a comercialização está planejada para 2024. Compartilhe esta história Facebook Twitter

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Applications of LPCAMM Memory Modules

Samsung Electronics’ First LPCAMM Launches Memory Module Future The LPDDR based LPCAMM will be the market leader in the next-generation module market for personal computers and laptops. There is potential for this industry to expand into data centres. These modules have a performance that is increased by seventy percent when compared to So DIMMs, have an improvement in power efficiency that is increased by fifty percent, and have a decrease in mounting space that is reduced by sixty percent. In the year twenty four, it is anticipated that commercialization will get underway.

It was announced today by Samsung Electronics, a worldwide pioneer in advanced memory technology, that the firm has created the industry’s first Low Power Compression Attached Memory Module (LPCAMM) form factor. The announcement came in the form of a press release.

This innovation is projected to cause a shift in the market for DRAM used in desktop and portable computers, and maybe even in data centres. The innovative development that Samsung has been working on for its 7.5 gigabits per second (Gbps) LPCAMM has finally finished system verification utilising Intel’s platform. This achievement was achieved in the last several weeks.

In the past, the most common types of memory modules installed in desktop personal computers (PCs) and portable laptop computers (laptops) were LPDDR DRAM and DDR based So DIMMs. LPDDR memory may be compact, but since it is soldered directly into the motherboard, it is notoriously difficult to switch out if and when it becomes necessary.

Because of this, it is difficult to perform repairs or modifications. So DIMMs, on the other hand, have the benefit of being easy to install and remove, but their performance as well as other physical qualities are limited.

By overcoming the restrictions of LPDDR and So DIMMs, LPCAMM was created to meet the rising need for devices that are both more effective and more space-efficient. This was accomplished by designing LPCAMM. LPCAMM gives manufacturers of personal computers and laptops greater freedom during the production process since it is a module that can be removed.

This flexibility is beneficial to both industries. On the same surface, LPCAMM may require up to sixty percent less space than So-DIMM does, making it the most space-efficient option. Because of this, it is possible to make better use of the available space inside the devices, which ultimately results in an improvement of up to fifty percent in performance and up to seventy percent in power efficiency.

LPDDR has emerged as a prospective contender for usage in server applications due to its ability to lower the amount of power that it consumes. In these kinds of applications, LPDDR has the potential to reduce the total cost of operation, also known as TCO. However, using LPDDR might result in operational difficulties, such as the need to switch out an entire server’s motherboard if the server’s DRAM specifications are modified.

One of the possible drawbacks of using LPDDR is that this will occur. Because LPCAMM offers a solution to these issues, there is a good chance that it will become the solution of choice for data centres and servers in the near future. This is because LPCAMM offers a solution to these issues.

According to Dr. Dimitrios Ziakas, Vice President of Memory & IO Technology at Intel, “The advantages of LPCAMM in terms of energy efficiency and repairability make this new form factor a game changer in today’s PC market.” The traditional PC industry is going to have to adapt to this new form factor in order to compete.

“We are thrilled to be a part of the new standard that will enable the client PC ecosystem and pave the way for future adoption and innovation in broader market segments,” said one firm representative. “We are thrilled to be a part of the new standard that will enable the client PC ecosystem.”

According to Yongcheol Bae, Executive Vice President of the Memory Product Planning Team at Samsung Electronics, “with the growing demand in innovative memory solutions comprising high performance, low power consumption, and manufacturing flexibility across various fields,” there is a need for more memory products that meet these criteria.

According to Bae, “LPCAMM is anticipated to gain widespread adoption in personal computers, laptops, and data centres.” “Samsung is dedicated to actively pursuing opportunities to expand the LPCAMM solution market and is committed to collaborating closely with the industry to investigate new applications for the use of its products,” and “Samsung is dedicated to actively pursuing opportunities to expand the LPCAMM solution market.”

The evaluation of LPCAMM using systems of the next generation with significant customers will take place this year; nevertheless, the commercialization of the technology is not anticipated to take place until 2024.