DDR Memory Compatibility Issues Is DDR4 memory compatible with DDR3

See how different they are:

1. Delay problem:

At the same core frequency, DDR2 actually operates at twice the frequency of DDR. This is due to the fact that DDR2 memory has twice the 4-bit pre-read capability of standard DDR memory. In other words, while DDR2, like DDR, uses the basic method of simultaneous data transmission at the rising and falling delays of the clock, DDR2 has twice the ability to pre-read system command data as DDR.

That is, at the same operating frequency of 100MHz, the actual frequency of DDR is 200MHz, while DDR2 can reach 400MHz.

This leads to another problem: in DDR and DDR2 memory with the same operating frequency, the memory latency of the latter is slower than that of the former. For example, DDR 200 and DDR2-400 have the same latency, while the latter has twice the bandwidth.

Actually, DDR2-400 and DDR 400 have the same bandwidth, they are both, but the core operating frequency of DDR400 is 200MHz, while the core operating frequency of DDR2-400 is 100MHz, which means that the latency of DDR2-400 is higher than that of DDR400.

2. Encapsulation and heat generation

The biggest breakthrough point of DDR2 memory technology is not that users think that it has twice the transmission capacity of DDR, but that DDR2 can achieve faster frequency increase and break through the 400MHz limit of standard DDR with lower heat generation and lower power consumption.

DDR memory is usually packaged in TSOP chip form, which can work well at 200MHz, when the frequency is higher, its long pins will produce high impedance and parasitic capacitance, which will affect its stability and the difficulty of frequency increase. This is the reason why it is difficult for the core frequency of DDR to break through 275MHz. The DDR2 memory is in FBGA package.

Different from the widely used TSOP package, the FBGA package provides better electrical performance and heat dissipation, which provides a good guarantee for the stable operation of DDR2 memory and the development of future frequencies.

The fact that DDR2 memory uses a much lower voltage than the DDR standard provides significantly smaller power consumption and less heat generation, is significant.

It is DDR that holds the master, so the two cannot be mixed. It is recommended to buy a Kingston 256 plus about 300 yuan.

Hello. Your motherboard does not support DDR2. Only DDR memory can be loaded.

Kingston's memory compatibility is good. You can add a modern one to try. If not.

Go and try again with a different brand. When you buy it, tell the merchant that it's okay. Say you're adding memory.

There are incompatible ones to change them. They don't want to. You can buy another one.

DDR2 is not supported! Buy a pair of kingmax or kingbox compatibility is a little better, generally there is no compatibility problem, you can just change it if you have it!

Incompatible. The best thing to do is to buy a bar of the same brand as before.

Others may not be compatible.

You can buy a 512. But it's better to be the same.

Because in this way, both can be used at the same time.

There shouldn't be a conflict The landlord's wrench and strip are the same as mine, hehe.

No, it can only support 1st generation.

Your board does not support DDR2 up to DDR333 compatibility.

In terms of memory throughout the ages, it has never been possible to use different products at the same time, and DDR4 is no exception. The standard voltage of DDR4 is , and DDR3 is already seen from the voltage, and the two cannot be replaced by each other.

So ......Incompatible.

The answer is no, due to the obvious changes in the appearance of DDR4 memory modules, the gold finger of the memory module has become curved, and the shape and interface have changed, from which it is obvious that DDR4 memory is not compatible with DDR3.

The gold finger contacts of DDR4 memory have reached 284, and the spacing of each contact has been reduced from 1mm of DDR3 memory to 240 gold finger contacts of the previous generation of DDR3 memory), which leads to DDR4 to design the lower part of the memory as a slightly protruding shape in the middle and a shortened edge, and the high point of ** and the low point at both ends are transitioned with a smooth curve, which forms a curved effect, and the "notch" in the middle of the gold finger is the position of the dumb-proof mouth is closer to the DDR3**.

DDR4 compatible with what CPU and motherboard:

The answer is that DDR4 memory is only compatible with new CPUs and motherboards.

In terms of Intel platform, only the sixth-generation CPU currently supports DDR4, such as i3 6100 6300 i5 6500, etc., and the mainstream sixth-generation CPUs all support DDR4 memory.

In terms of AMD platform, none of the AMD processors currently support DDR4 memory, but AMD's upcoming AM4 interface **CPU this year will fully support DDR4 memory.

In terms of motherboards, there are currently only sixth-generation motherboards, Intel's 100 series motherboards, such as B150 and Z170 motherboards, support DDR4 memory, and the AMD platform needs to wait until the **AM4 interface motherboard supports DDR4 memory.

It is also worth mentioning that the new entry-level motherboards may not support DDR4 memory, such as low-cost entry-level B150 motherboards, some of which do not support DDR4.

The first to get DDR5 is definitely the server platform. Next year, major manufacturers should have server CPUs that support DDR5. Compared with DDR4, DDR5 has a great improvement, and the interface is closer to LPDDR, which is very different from the previous DDR4.

If you want to use DDR5, CPU, and motherboard, you have to change it, plus the reason for **, production capacity and other factors, as well as the memory bandwidth.

The requirements are not as high as the server, and the home platform will have to wait a long time to use the "affordable DDR5".

Of course, it is not excluded that in order to suppress the domestic DDR4, Samsung Hynix.

There is a crazy situation where DDR5 is promoted, and that situation will accelerate the popularity of DDR5.

Although Intel's Alder Lake S supports DDR5, Alder Lake S also supports DDR4, and obviously only high-end Alder Lake will use DDR5 more, which is not popular in this generation.

DDR5 is a type of computer memory.

Specification. with DDR4 memory.

In comparison, the DDR5 standard has stronger performance and lower power consumption.

Other changes include a reduction in voltage to 32 40 bits per channel (ECC), increased bus efficiency, and an increase in the number of prefetched bank groups to improve performance.

DDR5 memory is not officially supported yet.

AMD is expected to replace the socket on the 2021 Zen4 processor with support for DDR5 memory

The 14nm and 10nm processors on Intel's side have not clearly supported DDR5 memory, and the official roadmap shows that the 7nm process Sapphire Rapids processor in 2021 will be on DDR5, and it is the first server product, and the consumer-level estimate will have to wait a little longer.

Short DDR4? Refers to laptop memory? Laptop memory cannot be used on desktop memory slots, and the two are pinned differently and cannot be mixed.