内存条1r和2r的区别(内存条1r2r4r区别)

2rx8 indicates that the number of memory particles in memory (memory) is 16.

1rx8 indicates that the number of memory particles is 8.

2rx4 indicates that the number of memory particles is 8.

The memory calculation method is as follows:

The bit width of the CPU data bus is generally 64 bits now. This bit width is called the physical bank. Then memory 1RX4 represents a 64bit memory, and X4 represents the number of bits per memory particle.

From here we can easily know the number of memory particles: 64/4=16.

If it is 2rx8, the memory chips are: 64*2/8=16.

If it is 2rx4, the memory chips are: 64*2/4=8.

If it is 1rx8, the memory chips are: 64/4*2=8.

So whether it is 1RX4, 2Rx4 or 1RX8, 2Rx8, the meaning can be understood as the number of memory particles in the memory, not single-sided or double-sided memory.

Extended information

Example: samsungk4h280838b-tcb0

The main meaning of particle capacity:

1. Chapter Bit 1: Chip function k, which represents a memory chip.

2. Digit 2: chip type 4, representing dram.

3. Position 3: Further type description of the chip, s represents sdram, h represents ddr, and g represents sgram.

4. Digits 4 and 5: Capacity and refresh rate. Memory with the same capacity uses different refresh rates and different numbers. 64, 62, 63, 65, 66, 67 and 6a represent 64mbit capacity; 28, 27 and 2a represent 128mbit capacity; 56, 55, 57 and 5a represent 256mbit capacity; 51 represents 512mbit capacity.

5. Digits 6 and 7: Number of data line pins, 08 represents 8-bit data; 16 represents 16-bit data; 32 represents 32-bit data; 64 represents 64-bit data.

6. Position 11: Connect “-”.

7. Bits 14 and 15: chip speed, such as 60 is 6ns; 70 is 7ns; 7b is 7.5ns (cl=3); 7c is 7.5ns (cl=2); 80 is 8ns; 10 is 10ns (66mhz).

Reference source: Baidu Encyclopedia: Memory Particles

The two strings 1Rx4 and 2Rx4 describe the composition of the memory module.

The number "4" after 1Rx4 and 2Rx4 indicates that the memory capacity is 4GB, and the number before "R" indicates the composition of the module:

1Rx4 indicates that the memory module consists of 1 row Composed of 4 memory chips.

2Rx4 means that the memory module consists of 4 memory chips in 2 rows.

In terms of use, there is no obvious difference between 1Rx4 and 2Rx4, because they both have 4GB memory capacity, but they are composed in different ways. However, in general, the memory stick composed of 2Rx4 is faster than 1Rx4 in terms of access speed because it has more data channels.