What are the benefits of dual-channel memory, the difference between dual-channel memory and single-channel memory?

What are the benefits of dual-channel memory
1, can bring twice the memory bandwidth, so that those with the memory Data must be frequently exchanged software to get great benefits, such as: SPECViewperf, 3DMAX, IBM Data Explorer, Lightscape and so on.
2. When the on-board graphics card shares memory, the high memory bandwidth brought by dual-channel technology can help the graphics card get a more smooth speed in the game, taking 3Dmark2001Se as an example, the gap in its score can be extended to 15-40%.
Disadvantages of dual-channel memory
1, must be framed in support of dual-channel motherboard, and must have two of the same capacity, type of memory. Intel's dual-channel requirements for memory type and capacity are very high, and the two memory strips must be exactly the same. The SIS and VIA dual-channel motherboards allow different capacities and types of memory to coexist, as long as it is two memory sticks. 2, dual channel memory control technology in ordinary games and applications, and the gap with the single channel is very small
3 You need to buy a motherboard and two memory strips that support dual-channel memory control technology, which requires more cost
Dual channel connection is very important for the first hand, once the connection is not correct, it will not be able to make the dual channel work.
5, dual-channel memory architecture, its overclocking is more difficult, which limits the user who likes DIY overclocking.
If the CPU does not meet the dual-channel requirements, but the dual-channel motherboard is opened, the performance may not rise but fall. If the CPU and motherboard support dual channels, the theoretical use of two 256M memory than one 512M memory performance can be 2x improved, but the actual effect is only 20%-30% performance improvement
Dual-channel memory does not need to be set, dual-channel memory technology is actually a memory control and management technology, it depends on the chip set of the memory controller, in theory can make two of the same specifications of the memory provided by the bandwidth doubled. It is not a new thing, and has long been used in server and workstation systems, only to solve the increasingly difficult bandwidth bottleneck of desktop computers it has come to the forefront of the technology
inte has strict restrictions on the construction of dual-channel memory modules, which must be the same capacity, the same structure (such as the number of single-sided, double-sided or memory particles, the vertical width of each particle and other parameters must be the same) and the same brand (SPD information of different products of memory may be different). At the same time, the installation memory must be symmetrical (the first slot in channel A matches the first slot in channel B, or the second slot in channel A matches the second slot in channel B).
Principle of dual-channel memory technology
Dual-channel memory technology is actually dual-channel memory control technology, which can effectively improve the total memory bandwidth, so as to adapt to the data transmission and processing needs of the new microprocessor, its technical core is that the chipset (North bridge) can be addressed on two different data channels, read the data R memory can reach 128 bit bandwidth.
The difference between dual-channel memory and single-channel memory
1. Different requirements
Memory module Single-channel requires one memory module, and dual-channel requires at least two memory modules.
2, memory capacity is not the same
If a single 2G module is used, the dual-channel module is used as two DIMMs, and the single-channel module is used as one DIMMs
3, the reading speed is not the same
A single channel can only be read or written at the same time. Dual-channel means that the memory uses different channels to read and write at the same time, and the memory bandwidth is flipped
times
4, processing capacity is not the same
Dual recitation has advantages over single recitation in terms of reading and writing, and it is definitely faster than single recitation in daily opening of software or documents. For example, when running some large games, it is a little difficult due to memory bandwidth problems, and the performance improvement brought by dual channels can be obviously felt.