The article is transferred from: The difference between ddr3 and ddr4
Compared with the previous generation DDR3 memory , the performance of the new generation DDR4 memory has been greatly improved, and the power consumption has also been reduced a lot. What makes everyone even more excited is that its price is almost the same as DDR3 at present. This will inevitably make new users excited. But first of all, I am very sorry to tell you that DDR3 and DDR4 memory are quite different, from appearance to parameters are absolute changes, and they are not compatible with each other.
Every time the memory is upgraded, it is the processor that must be supported. The memory of the Haswell-E platform is of the same four-channel design as the IVB-E/SNB-E. The DDR4 memory frequency natively supports 2133MHz. Compared with the IVB-E's DDR3 native 1866MHz, the starting frequency has been greatly improved. As a new flagship, Haswell-E has two biggest upgrades: one is the 6-core upgrade to 8-core, and the other is the support for DDR4. The overall cost at the initial stage of listing is quite high, and it will not support both DDR3 and DDR4 memory, so the threshold for DDR4 popularization is increased.
What is the difference between DDR3 and DDR4 memory?
- The appearance of DDR4 memory modules has changed significantly, and the golden fingers have become curved
- DDR4 memory frequency is significantly improved, up to 4266MHz
- DDR4 memory capacity is significantly improved, up to 128GB
- DDR4 power consumption is significantly reduced, the voltage reaches 1.2V or even lower
Can DDR3 and DDR4 be used together to form dual channel?
Unfortunately, because the DDR4 memory interface has been changed, the new generation of DDR4 memory is no longer compatible with the old motherboard. At present, only 100 series motherboards corresponding to Intel's sixth-generation CPU are compatible with DDR4. As for AMD motherboards, DDR4 memory support can only be added after the launch of the new AM4 interface this year. Currently, all AMD platforms on the market do not support DDR4 memory.
Due to the change of the interface, the number of golden finger contacts in DDR4 memory has reached 284, and the distance between each contact is only 0.85mm (the number of golden finger contacts in DDR3 memory is 240, with a distance of 1mm). Because of this change, the memory gold finger part of DDR4 is also designed to be slightly protruding in the middle, with a short edge, and a smooth curve transition between the high point in the center and the low point at both ends. Therefore, DDR4 is a curved effect, and the position of the DDR4 foolproof port is more in the middle than DDR3.
DDR3 and DDR4 sockets are different
Because the compatible motherboards are different, DDR4 and DDR3 memory cannot be used in general, let alone DDR3+DDR4 to form a dual channel.
write at the end
In short, DDR4 and DDR3 memory cannot be used interchangeably, and the two are not compatible. However, at present, there are 100 series motherboards that support both DDR4 and DDR3 memory. The demand for such non-mainstream motherboards is relatively small, so it is not recommended. Zifan believes that since it is equipped with the latest platform, DDR3 memory will lose the meaning of the new platform. In addition, old assembled computer users should not buy DDR4 memory on impulse, because DDR4 needs the support of a new generation of 100 series motherboards. The motherboard doesn't work at all. If you really want to experience the effects of DDR4 memory, you'll have to assemble a new computer.