Draeno Posted March 6, 2023 Posted March 6, 2023 One of the most common details in the specifications of laptops is that in certain models LPDDR5 is mentioned as a type of RAM memory, which is usually common in mobile phones and on paper, at least in transfer speed it is compared with the DDR5. However, things are not as simple as they seem. One of the advantages that the PC has over consoles is not relying on a single pool of memory for both graphics and general processing, which is something that does happen on mobile phones and video game consoles. The curious thing about LPDDR5 and GDDR6 is that they share one thing in common, they give importance to bandwidth in exchange for sacrificing latency, which means that the processor performs worse. Why is LPDDR5 worse than DDR5 on PC? In theory and on paper, DDR5 and LPDDR5 memory perform the same if we look at their bandwidth, but with a few small differences. The clearest is that there are no memory modules in DIMM or SO-DIMM format that use LPDDR5 memory. That is why the specifications of Intel and AMD desktop processors do not support this type of RAM, since they are not used. However, despite the name of Low Power or low power, LPDDR5 has nothing to do with DDR5 and it is not a reduced consumption version either. They are two different memory standards approved by the JEDEC and consequently have different communication times between both types of memory and this is where the problem comes in. Have you ever wondered why LPDDR5 latency times are not public? Well, for the simple fact that they are much worse than DDR5 and end up being a bottleneck for the system's CPU. In other words, when choosing a laptop, if it has DDR5 memory it will have better processor performance than LPDDR5, however, there are more and more models being sold with this configuration, especially ultra-thin laptops. https://hardzone.es/noticias/componentes/lpddr5-cuello-botella-procesador/
Premium
Recommended Posts