DDR5 With Significant Performance Gains Compared to DDR4
Memory manufacturer Longsys published a benchmark of new DDR5 RAM chips. The results in data write and read speeds are much better than in the case of DDR4. Is there going to be a revolution in performance?
- Memory chip manufacturer Longsys revealed benchmark results of its new DDR5 memories.
Longsys published information about the launch of new DDR5 memories and at the same time their benchmark results. The prototype modules named ES1 have a base clock speed of 4800 MHz and two variants - 16 GB and 32 GB. Some benchmarks report performance gains of up to 112% over DDR4. At the same time, almost doubled latency seen in AIDA64 results is somewhat worrying.
A screenshot from AIDA64. Source: Longsys
Longsys published results from two benchmarks, AIDA64 and Ludashi, popular in China:
DDR5 32GB CL40 | DDR4 32GB CL22 | Difference. | |
AIDA64 read | 35844 | 25770 | 39% |
AIDA64 write | 32613 | 23944 | 36% |
AIDA64 copy | 28833 | 25849 | 12% |
AIDA64 latency | 112,1 | 56,8 | 97% |
Ludashi | 193684 | 91575 | 112% |
CL - CAS Latency
CL40 latency (40-40-40-77) may raise some concern, but it's worth remembering that this is only the number of cycles needed to receive data from a memory cell. Better bandwidth requires higher clock speeds for RAM chips - but at the same time, the time per cycle decreases. That's why, despite increasing CL values in successive generations of DDR memory, the access latency actually remains at a similar level.
It is worth mentioning that the tested modules were compliant with JEDEC specfication. Consumer products should have lower latency with good overclocking capabilities, especially those intended for gamers. The test platform used an engineering sample of an 8-core processor from Intel's upcoming 12th-gen Alder Lake. It is expected to debut in late 2021 and it will come with a new type of socket, called LGA1700. Motherboards for next-gen processors will fully support DDR5 memory.
