ByAbram Eschbach 2020-02-27 1798
However, looking back at the development of memory capacity, it has gone through a long process from the initial KB to GB leap, from a single 1GB to now a single 16GB or 32GB evolution.
At this point, you may already know what to say next, but to make it easier for you to understand, let's take a look at the structure of memory.
The memory stick as we know it at present is basically composed of four parts: particles, gold finger, radiator and anti-dull mouth. Among them, the radiator has become more and more popular in the past two generations, and it can be said that it is the standard configuration of high-performance memory.
In the process of memory evolution, with the change of capacity, the position of gold finger and anti-dull mouth also changes. However, we do not elaborate on the latter two here, but you can still compare the changes in the following pictures.
Next, let's talk about the changes in memory capacity.
Pre-DDR era: from KB to MB.
On the original PC, the memory stick was not as independent as it is now, it was welded directly to the motherboard and had a capacity of only 64KB to 256KB.
The disadvantage of fixed type is obvious, because it can not be expanded, it is more and more difficult to meet the needs of hardware and software for larger memory, so the independent memory bar arises at the historic moment.
During this period, memory strips have experienced the era of SIMM, FPM DRAM, EDO DRAM, SDR SDRAM, Rambus DRAM and so on. Because of their long age, we do not delve into their evolution process. Here we uniformly call them the pre-DDR era.
In the pre-DDR era, the maximum memory capacity only stays in the MB stage, coupled with the inherent limitations, memory urgently needs new upgrades.
DDR era: from MB to GB.
Now that there is the pre-DDR era, then comes the DDR era.
The full name of DDR memory is DDR SDRAM (Dual Date Rate SDRAM), which translates to double-rate SDRAM,. As its name implies, it is an upgraded version of SDR SDRAM.
DDR SDRAM transmits signals once at the rising edge and falling edge of the clock cycle, so that its data transmission speed is twice as fast as that of SDR SDRAM, and it can control power consumption, which better balances the compatibility and performance of the memory controller at that time.
The frequency of the first generation of DDR is only 200MHz. Later, DDR-266, DDR-333, and DDR-400, are provided with 128MB to 1GB options on capacity.
Since the era of DDR, the memory capacity has officially stepped into the GB stage. But the process took about 30 years.
DDR2 era: single 2GB prevails.
After the era of DDR, we naturally come to the era of DDR2.
In 2004, DDR2 memory was born along with the Intel915/925 motherboard, with frequencies ranging from 400MHz to 1200MHz, and the mainstream is DDR2-800.
The capacity starts from 256MB, with a maximum of 4GB, but basically a single 2GB.
DDR3 era: 4GB and 8GB become the mainstream.
In 2007, the arrival of Intel3 series chipsets announced that memory has entered the DDR3 era.
Compared with the previous generation of DDR2 memory, the voltage of the DDR3 is reduced from 1.8V to 1.5V. One of the most critical upgrades is that prefetching has changed from 4-bit to 8 DDR2, meaning that at the same frequency, DDR3 can provide twice as much bandwidth as DDR2.
The pins of both DDR3 and DDR2 memory gold fingers are 240Pin. the difference is that the positions of their anti-dull ports are different, which means they cannot be used on the same motherboard.
In the era of DDR3, memory frequencies are generally 1066MHz, 1333MHz and 1600MHz, while 2133MHz and 2400MHz basically belong to high frequency.
The capacity ranges from 512MB to 8GB, but it is dominated by 4GB.
The era of DDR4: the era of Real large capacity.
In 2014, it was the x99 platform released by Intel, that brought DDR4 memory to the stage.
DDR4 memory compared to DDR3 memory structure has been greatly changed, first of all, the gold finger pins from the DDR3 240s increased to 284, the location of the gap is also different, there is another point is the DDR4 gold finger is high in the middle and low on both sides of the curve (DDR3 is a straight line), this advantage is to maintain the memory and slot signal contact area, while convenient for users to plug.
The standard voltage of DDR4 memory is further reduced to 1.2V, the frequency starts from 2133MHz, and the high frequency can reach 4400MHz and 4600MHz. Yingchi HOF OC Lab limited edition water-cooled memory belongs to what we call high frequency series.
In terms of capacity, the basic 8GB starts alone, and now it gradually evolves to a single 16GB or even 32GB. Yingchi's Star Yao series of memory has launched a single 16GB, and a single 32GB is also in preparation. One against four, one can make the system go smoothly.
According to the development of memory, in the era of DDR5, there is no doubt that the frequency of memory will be higher and the capacity will be larger. At present, the relevant samples have been shown, but it will take some time to put them into application.
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