2 1G Dual Channel VS 2G

Well, dual-channel means that the memory speed is twice as fast.

As for 2x1g or single 2g, you look good at yourself.

Now the maximum recognition of XP 3G, so 2 and 2G installed XP must be a waste of 1G, some 2 first motherboards support 3X1G 3 channels, but not really, in fact, I personally recommend that a single 2G is enough If you are playing games now, you don't have dual channels are enough I don't want to use XP in the future, or the memory is sold cheaply, and then buy 2G, and then waste it is better than now** (but you can't wait too long, stop production** and rebound).

Theoretically, it's still relatively obvious, but if you're a new machine, 2G RAM, playing most games nowadays, even if it's not dual-channel, it's fine, by the way, if it's AMD's CPU, it's a little more dual-channel than Inter's.

If it is AMD's CPU, it is directly on a single root 2G, because the integrated memory controller is not sensitive to dual! Point-to-point transfer! The meaning of dual channel is to make the memory bandwidth higher than or meet the front-side bus or HT super transfer bandwidth!

If it is an Intel CPU, it is recommended to be dual-channel, because there is no integrated memory controller, and the memory controller needs to go through the motherboard, and the memory controller has a relatively large latency! Dual channels can increase the bandwidth and bit rate to ensure smooth data!

If you only need 2G of RAM, then 2 * 1G is good, in general, dual channel is that you can run faster than 1 * 2G.

If you are on the AMD platform, you don't have to think about it, AMD's CPU itself integrates a memory controller, dual-channel has little impact on it, it is recommended to go directly to 2G, Intel platform depends on whether you plan to add memory in the future, if you don't plan to upgrade the memory in the short term, use two 1G!

The 3-channel is the x58 i7 platform, right?

1x faster dual-channel memory? I ate the machine to get a 30% improvement.

Dual-channel mainly depends on the memory frequency, CPU external frequency x4 = peer CPU frequency. This algorithm excludes the i7.

I don't care**,If the motherboard has 4 slots,4 1G。。。

2 x 2G form a dual channel, with stronger performance. Because a 2G and a 4G group of dual channels is actually the same effect as the brother resists 2 2G for Qingzai's "dual channel to improve performance". But in terms of memory size, of course, one is 2G and one is 4G.

1. 4 G memory is enough, Xian Zhengchun will choose 2 2G groups. If you choose 2G and 4G groups, you actually waste 2G memory.

2. If the 4G memory is not enough, choose the 2G and 4G groups.

The size of the two-channel performance improvement is the same for both options, but the size of the memory will also affect the performance, provided that the memory is enough or not, and if it is enough, don't waste it.

Regarding dual-channel, the current CPUs are all integrated memory controllers, and generally support dual-channel, even if different frequencies (the motherboard must support) mixed plug-in can also form dual-channel, but the high-frequency memory will be used at a reduced frequency.

So, here it is, whether it's 2G or 1 2G + 1 4G can form a dual channel, if the frequency is the same, the performance is the same. A 32-bit system can probably only recognize g memory, but a 64-bit system can recognize it.

A key issue here is the capacity and future upgrades, 1 2G + 1 4G scheme first has a relatively large capacity, in addition, if you upgrade in the future, you should be able to buy a 4G one.

About the memory virtual silver disk: this technology is currently more mature, you can virtualize a part of the memory into a hard disk to use, which is equivalent to a hard disk of hundreds of thousands of revolutions, the performance is very good, such as the system temp, IE temporary files, RAR temporary directories, etc. are built on it, due to the characteristics of memory power failure data disappearing, these useless temporary files are gone after restarting, making the system more concise and efficient.

In terms of 2+2 and 2+4 alone, 2+4 will have some advantages, creating a 1G virtual hard disk, putting the system temp on it, can greatly improve the system response speed.

It is possible to form asymmetrical dual channels.

Asymmetric dual-channel memory technology allows different capacities, different specifications, and even unpaired memories to form dual-channel, making memory collocation more flexible and making system configuration and memory upgrades more flexible.

For example, the 8GB memory and 2GB memory mentioned in the question implement asymmetric dual channels. The system divides the 8GB channel into two parts: one part and the 2GB channel form a dual channel, while the remaining 6GB still works in single-channel mode, and the capacity and speed are not wasted.

The technology was used on the Intel 915 chipset, and it was not until the 945 955 chipset matured, and the 965 975 chipset optimized it for better performance.

Today's motherboards already support asymmetrical dual-channel memory technology.

No, dual channels must be two memories of the same capacity, frequency, and type, and the only one is brand-agnostic (basically).

A 4G will have good scalability in the future; Two 2G, now the performance is good.

1. Two 2G can form dual channels, which is twice the bit width of a single memory, and the bandwidth should also be significantly expanded, and the overall speed will be improved to a certain extent.

2. A single 4G is relatively stable, because there is only one memory, and the probability of failure is relatively small. Large-capacity memory, usually more technologically and technologically advanced.

3. Single memory, easy to expand larger memory in the future. 2 2G is not easy to expand, and it is easy to waste investment when the capacity is greatly expanded in the future.

Dual-channel is best to have two identical memory sticks,If your situation is a 64-bit system,I definitely choose2G+4G,2G+4G The effect of memory is far greater than that of dual-channel2G+2G,This doesn't need to be considered。

The composition of dual channels has the following working modes, depending on the combination of the motherboard and the CPU:

1.Symmetrical dual-channel operation.

The symmetrical dual-channel working mode requires the memory capacity of the two channels to be equal, but there is no strict requirement for the absolute symmetry of the memory capacity, which can be 512MB +512MB for channel A and 1GB for channel B, as long as the total capacity of channel A and channel B is equal. Dual-channel mode is available with 2, 3, or 4 memory modules, depending on the speed of the memory module installed in the system, if the speed of the memory module is different. The details are as follows:

1) Absolute symmetry of memory modules. This is the most ideal symmetrical dual-channel, that is, insert the same capacity of memory sticks in the same color slots, the number of memory modules is 2 or 4, and all the memory in this mode works in dual-channel mode, which has the strongest performance.

2) Symmetry of memory capacity. This mode does not require the same number of memory modules in the two channels, and can be composed of 3 memory channels to form a dual channel, and the total memory capacity of the two channels is equal, and all the memory also works in dual channel mode) The performance is slightly inferior to mode (1).

2.Asymmetrical dual-channel mode.

In asymmetric dual-channel mode, the memory capacity of the two channels can be unequal, and the size of the memory capacity that makes up the dual channel depends on the channel with the smaller capacity. For example, if channel A has 512 MB of memory and channel B has 1 GB of memory, 512 MB in channel A and 512 MB in channel B form dual channels, and the remaining 512 MB memory in channel B still works in single-channel mode. It is important to note that both RAM must be plugged into slots of the same color.

The dual-channel technology Intel architecture is generally determined by the MCH (Northbridge), while the AMD architecture is determined by the CPU.

Theoretically, yes, but in fact no.

What I know so far: No, you have to pair it.

Your question and your description are two questions that are not related to each other at all, so I'll answer them both :

1: For the APU, two 2G dual-channels are better, the memory bandwidth will be doubled, and the performance of the integrated graphics card will be greatly increased. For an average CPU, the performance difference between a single 4G single channel or dual channel is so small that it is not worth counting.

2: Your motherboard supports a maximum of 8G, which means that it is an old motherboard a few years ago, whether it supports a single 8G is still a problem, it is likely that the maximum support is only a single 4G, so it is the safest solution for you to buy two single 4G memory.

Considering that the compatibility of the old motherboard with single-sided particle memory may not be ideal, it is best to buy [single 4G] [double-sided] memory is the most reliable. It doesn't matter if it's second-hand memory if necessary.

Dude, you have to know the point of opening a double channel.

In these two memories, data can be addressed and read separately by the CPU, doubling the bandwidth of the memory and doubling the speed of data access (theoretically). The popular dual-channel memory architecture is built with two 64-bit DDR memory controllers with a bandwidth of up to 128 bits. Because the two memory controllers in the dual-channel system are independent and complementary intelligent memory controllers, they can operate simultaneously with zero waiting time between them.

This complementary "nature" of the two memory controllers allows for a 50% reduction in effective wait time, doubling the bandwidth of memory. Dual-channel is a new technology used in the motherboard chipset (Athlon-64 is integrated into the CPU), and has nothing to do with the memory itself, any DDR memory can work on a motherboard that supports dual-channel technology, so there is no such thing as "memory supports dual-channel".

If two are good or bad, one can be used in the other.

But if you're not overclocking, it's pretty much the same.

Not much faster.