The current mainstream memory standards used are mainly DDR4 and DDR5. The market share of DDR5 is rapidly increasing. However, although the price has been reduced, it still has a high price difference with DDR4.
The JEDEC Solid State Technology Association will not launch DDR6 memory in the short term. Therefore, after comprehensive consideration of cost issues, JEDEC and memory manufacturers decided to expand the specifications of the DDR5 standard and increase the rate to 8800MT/s, that is, DDR5-8800, while the bandwidth is Increased to 70.4GB/s
DDR5 series memory has a variety of speed specifications, including 3200, 3600, 4000, 4400, 4800, 5200, 5600, 6000, 6400, 6800, 7200, 7600, 8000, 8400.
The latest 8800 still continues the +400MT/s rule, so it is estimated that 9200 and 9600 will be launched later. It is said that extreme overclocking users have overclocked some high-performance DDR5 memories to 11240MT/s, but JEDEC may not launch DDR5-10000 , after all, the DDR6 draft plan is to provide 12800MT/s. If the performance of DDR5 is greatly improved, it will not be conducive to the promotion of future DDR6 memory for JEDEC and memory manufacturers.
The absolute latency (CAS) of DDR5-8800 is still about 14ns (nanoseconds), specifically 14.09ns. There has been no improvement in this aspect, which means the system needs to wait longer during execution.
Increasing bandwidth to 70.4GB/s is one of the concerns of server vendors. This will help continue to improve the overall performance of the system, especially under the current AI craze. In addition to GPUs, other hardware must also follow. It cannot become a bottleneck.
Finally, DDR5-8800 may also solve a security problem: rowhammer-style vulnerability exploitation. The fix is to prevent memory flipping. JEDEC does not specifically mention this issue, but there are some descriptions related to this aspect. Interested users can go JEDEC ReadingTechnical documentation。
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