Longsys release the test results of its DDR5 module

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In recent news, the Chinese memory manufacturer, Longsys, has released test results of its DDR5 memory modules, which were evaluated on an Intel Alder Lake Desktop platform comprising of an 8 core chip.

According to sources, the performance was measured on Longsys DDR5 ES1 modules which offer speeds of up to 6.4 Gbps. The Longsys’s DDR5 memory module has two variants, both of which come in UDIMM form factor.

The first variant feature 16 GB capacity (JDEC R/C A 0.50) & the second featuring 32 GB capacity (JDEC R/C B 0.51). Both the variants feature 4800 MHz pin speeds, CL40 (40-40-40-77) timings, make use of 16Gb (2x8b) modules and have voltages rated at 1.1/1.1/1.8V (VDD/ VDDQ / VPP).

Coming to the test results, the Longsys used the Intel Alder Lake-S ADP-S CRB development kit board, and the platform featured an Intel Alder Lake ES Desktop CPU, which features 8 cores and a clock speed of 0.8 GHz.

According to the test results, the DDR5-4800 MHz memory running on the Intel Alder Lake Desktop CPU platform scored over 190,000 points in the memory tests. Longsys’s DDR4 memory only scored 91,757 points which means a 53% improvement for DDR5 memory.

In the AIDA64 benchmark, the DDR5 memory running on the Intel Alder Lake Desktop CPU platform scored a 28% improvement over DDR4 in reading, 27% improvement in Write, and 10% improvement Copy tests. But the Latency of the DDR5 was far worse than DDR4, and that is major because we have much higher CAS timings for the DDR5 kit compared to DDR4.

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Longsys’s DDR5 memory is one of the many attempts in the high-performance next-gen memory technology, and it includes on-die ECC, 16n Prefetch mode, double the number of banks per module, two independent 32-bit channels per module for dual-rank memory DIMMs, enhanced end-to-end reception mode, and synchronous refresh mode for the bank.

Though several memory manufacturers have announced the DDR5 memory kits, we cannot see any concrete performance results from any of them.


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Nivedita Bangari
I am a software engineer by profession and technology is my love, learning and playing with new technologies is my passion.

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