Longsys Launches DDR5 Memory and Publicizes Test Data

March 22, 2021

Story

16th March 16, 2021, Longsys Electronics launches the Longsys DDR5 memory module (ES1). Longsys' FORESEE, a technical storage brand, and Lexar, a storage brand for high-end consumer goods, will also provide strong support in their main areas of application.

The newly-launched DDR5 involves the prototypes of two new architecture products: the 1Rank x8, and the 2Rank x8 standard PC Unbuffered DIMM 288PIN On-die-ECC. Compared with DDR4, DDR5 boasts significantly improved function and performance.

The test that is presented utilized the development board of the Intel AlderLake-S ADP-S CRB and memory module of the Longsys DDR5 32GB in Windows 10 Pro x64 OS. The actual DDR5 data is shown in two pieces of widely known software: Ludashi and AIDA64.

16th March 16, 2021, Longsys Electronics launches the Longsys DDR5 memory module (ES1). The company has done so in order to keep up with the development of storage technologies, to meet expectations from industry professionals and users regarding future product technology development, and to provide more possibilities for the future of storage industry applications. Moreover, Longsys' FORESEE, a technical storage brand, and Lexar, a storage brand for high-end consumer goods, will also provide strong support in their main areas of application.

 

The newly-launched DDR5 involves the prototypes of two new architecture products: the 1Rank x8, and the 2Rank x8 standard PC Unbuffered DIMM 288PIN On-die-ECC. Compared with DDR4, DDR5 boasts significantly improved function and performance.

Product Series	DDR5 UDIMM	DDR5 UDIMM
Capacity	16GB	32GB
Design Reference	JEDEC R/C A 0.50	JEDEC R/C B 0.51
Design Architecture	1Rank x8 / 288PIN	2Rank x8 / 288PIN
Speed	4800Mbps	4800Mbps
CL	CL 40	CL 40
VDD/VDDQ/VPP	1.1V/1.1V/1.8V	1.1V/1.1V/1.8V
Operating Temperature	0℃ ~ +95℃	0℃ ~ +95℃
Storage Temperature	-55℃ ~ +100℃	-55℃ ~ +100℃
DRAM Density	16Gb(2Gx8)	16Gb(2Gx8)
PCB Layout	8 Layer	8 Layer
PCB Size	133.35 * 31.25 * 1.27 mm	133.35 * 31.25 * 1.27 mm

Comprehensive data testing illustrates stable and superior performance

After years of concentrated accumulation, Longsys DRAM R&D took the lead when it came to investing in new-generation DDR5 product testing technologies. Select test data has been unveiled to the public for the first time. The test that is presented utilized the development board of the Intel AlderLake-S ADP-S CRB and memory module of the Longsys DDR5 32GB in Windows 10 Pro x64 OS. The actual DDR5 data is shown in two pieces of widely known software: Ludashi and AIDA64.

(BIOS indicates that the DDR5 new architecture adopts two completely independent 32-bit channels.)

① Ludashi test data

The hardware configuration is presented, and the memory is identified as Longsys. In the Ludashi test, the Longsys DDR5 32GB obtained a score of over 190,000

② AIDA64 test data

The test allocates scores for the read/write/copy/latency performance of the Longsys DDR5 32GB.

To highlight the improvement in performance, DDR4 test data is provided for comparison. The data shows that performance from the Longsys DDR5 has improved by leaps and bounds.

Production		Longsys DDR5 32GB 4800	Longsys DDR4 32GB 3200	Hoisting Capacity
CL		40	22
AIDA64	Read	35844	25770	40%
	Write	32613	23944	36%
	Copy	28833	25849	11%
	Latency	112.1	56.8	--

 

Core indicators reveal the power of new Longsys DDR5 technology

Added error correction capability

In addition to optimizing the DRAM kernel computing capability of the DDR5, Longsys DDR5 adds built-in error correction code (ECC) to fully implement data error correction.

Added 16n prefetch mode

By using the DDR4 as a foundation, the BL16 doubles the memory concurrency of the Longsys DDR5 to both fully and efficiently transmit data. This DDR5 DIMM architecture adopts two completely independent 32-bit channels to both improve concurrency and double available memory channels in the system.

Strengthened end-to-end receiving mode

Added CA and CS signals also use ODT. As a result, Longsys DDR5 memory further reduces the reflection interference effect of signal pulses, producing a purer signal transmission.

Double DDR5 Bank Groups

Longsys DDR5 BG provides less access latency, doubles overall system efficiency, and allows more pages to be opened simultaneously.

SAME-BANK Refresh mode

In accordance with the standard, Longsys DDR5 has actualized a new feature: SAME-BANK Refresh (synchronous refresh). This command can refresh one Bank in each BG while simultaneously keeping all other Banks open to continue normal operation.

FORESEE DDR5 memory module (ES1)

The continuous innovation and advancement of future application scenarios will impose more stringent requirements on storage technologies, as well as greatly accelerate the DDR5 development process. Mainstream platforms are rapidly pushing for DDR5 support. Reports show that Intel is expected to launch a platform supporting DDR5 in the third quarter of this year. The forces driving the DRAM memory market to upgrade to DDR5 come from professional applications that have a high demand for bandwidth. Servers, cloud computing, data centers, and high-performance computers are expected to be key application fields for deployment. This iteration will provide industry customers with superior memory solutions.

Conclusion

Although Longsys was late in the game with our memory product line, thanks to our 20 plus years of technical experience in the storage industry and our determination to create high-quality storage products, we have become ever more courageous along our technological innovation journey. Longsys attaches great importance to the protection of intellectual property, while simultaneously maintaining a firm grip on independent innovation.

This year, the Longsys memory product line will continue improving and providing both DDR5 product specifications and technical services in order to help industry customers and end users invest in DDR5 in future application scenarios, thus giving some flair to the storage ecosystem.

For more information, visit: https://www.longsys.com/