Is LPDDR3 necessarily inferior to DDR4 for thin and light notebook memory? What is the difference between the two?

Many people buy mobile phones when They all regard storage capacity and storage size as a very important purchase basis for reference, but few people care about their memory particles and what the standard is. In fact, there are a lot of tricks in it. Take the thin and light notebook as an example, the most common one is LPDDR3, one is DDR4 span>. Many people think that “4”must be better than“3” OK, so I thinkLPDDR3Not as good asDDR4. Of course, there is also a voice to support LPDDR3 , calledLPDDR3Lower power consumption is good for the battery life of thin and light notebooks, is that really true? Are the two comparable?

First of all, I want to say, LPDDRandDDR, are two completely different product lines. DDRFull nameDouble Data Rate Double rate synchronous DRAM, strictly speaking, DDRshould be calledDDR SDRAM. Based on our observations of the storage market, DDRGeneration andDDR2It will be rare in the market,DDR3 can still be seen in set-top boxes, optical cats, smart TVs and other fields.

and span>LPDDRFull name of memory YesLow Power Double Data Rate SDRAM< span style="color:#666666">, which is low power double data rate memory. It is related to the speed of loading games and launching applications in daily use. LPDDRBecause of the launch market ratioDDRLate, so the development of algebra is smaller, but it should be noted thatLPDDR3andDDR4 was released at the same time. There is no generation difference between them, but the positioning is different, and the performance gap between the two is less than 10%, while LPDDR3 It is better thanDDR4Power saving.

Let's talk about power consumption first. LPDDR3Power consumption is indeed better thanDDR4Low, but according to the usage environment. LPDDR3withDDR4The voltage is the same, both are 1.2V. At low load, LPDDR3will reduce voltage and frequency than DDR4Power saving; it is hard to say at high load, theoreticallyDDR4Save some power. Even under high loadLPDDR3More power saving, almost only 1W< span style="font-family:宋体">About a drop in the bucket. To put it bluntly, the memory itself is not a big power consumer, sayLPDDR3Compared toDDR4 has a huge advantage in battery life, and some exaggerated words. The impact of the two on battery life can be completely ignored.

Then performance. Although LPDDR3Low power consumption, but it does not meanLPDDR3 has poor performance, there is a very important premise here, currently equipped with LPDDR3 models are basically dual-channel, and many thin and light notebooks use is single channelDDR4, from the test data, dual channelLPDDR3Overall performance is better than single channelDDR4.

To sum up, desktop-level < /span>DDRMemory technology upgrades are slower than mobile terminals,LPDDRAs memory accounts for a relatively high proportion of power consumption in portable devices, and at the same time, it also undertakes the heavy responsibility of video memory. The iteration of technology has a great impact on the performance and performance of mobile phones. Power consumption has a huge impact, so compared to DDRMemory,LPDDRMemory is more easily perceived by users.

Because compared to mobile phones, computer The requirements for power consumption are not so high and sensitive, so many thin and light notebooks are still using LPDDR3 span> of memory, even the latest Intel processors only supportLPDDR4Xmemory, while span>LPDDR5Yes The standard configuration of most flagship models this year, compared to DDR5,LPDDR5< span style="font-family:宋体"> will be seen on many mobile phones.