AMD supports dual channel types, AMD platform group dual channel issues

No. AMD has only integrated a dual-channel memory controller on Sempron starting with the AM2 interface. However, it can only support up to the level of DDR2 667.

As for the single-core Athlon, the same is true. It is currently a dual-core Athlon, which can support DDR2 800 dual-channel memory.

AMD's bus bandwidth and way of working is very different from Intel. Theoretically, DDR2 667 with 800 bus Semperosaurus can already give full play to the performance of Sempsaurus.

As for the DDR2 800's memory, the extra bandwidth from the dual channels will actually be allocated to the chipset or other buses. That's reassuring. Lao Mei has taken it into account.

Can the bandwidth CPU provided by the dual-channel DDRII800 be eaten?

It's the other way around. It's the memory that follows the CPU.

If your CPU frequency is 266, and the DDR2 memory frequency is twice that of the CPU, it is DDR2 533

If you don't have DDRII 800 memory, then it's obviously a waste, and a lot of bandwidth can't be used.

The bottleneck is the CPU

No matter how big the funnel is, it doesn't make sense to enter as much as you want.

The bandwidth is not all for the CPU, and the graphics card also transmits data from the memory channel, so it is not very abundant.

AMD CPUs support dual-channel issues.

1. AMD CPU supports dual-channel mode.

AMD CPUs integrate memory controllers that support dual-channel mechanisms on the CPU instead of the motherboard on the Northbridge. AMD CPUs support dual-channel modes, which are different from Intel's, in that there are two modes and can be selected within the BIOS.

These two modes are unganged and ganged. Both modes are dual-channel. The default is unganged, because unganged performs better than ganged.

The 2 modes shown by the CPU-Z are also dual-channel.

Second, the boot display information of the two modes is different.

Judging from the boot display, unganged is 64 bits, and ganged mode is 128 bits. Don't be fooled by 64-bit and 128-bit and think that 128-bit performance is good. Not really.

3. The unganged mode has better performance.

The essence of dual channels is that the two channels work in turns, when the first channel is read, the second channel will be refreshed and prepared, and the second channel will be read immediately after reading the first channel, and then the first channel will prepare new data. This speeds up the reads and writes of memory. Unganged mode uses this method of reading and writing memory.

Ganged mode is to combine 2 channels into a single channel, and 64 bits become 128 bits. When reading and writing memory, it reads and writes according to a channel of 128 bits, so every time it is read, there must be a preparation time for charging and refreshing data, so the total time for reading and writing memory is extended. Dual-channel is to read and write one channel, and the other channel is prepared, saving the preparation time for charging and refreshing data, although it is 64 bits, two 64 bits work alternately, and the performance is higher.

Although the ganged mode combines two 64-bit data into 128 bits, it requires a preparation time for charging and refreshing data for one read/write, which is slower than that of unganged mode.

I don't have time to do any more testing. Customers who do not believe in this principle can test it for themselves. I've had customers ask similar questions and test them, and the results show that I understand what I said, and it's not set to ganged mode.

There is also the problem of EPP, EPP is a DDR2 1066 memory expansion specification developed by NVIDIA, AMD is not supported, even if EPP memory is used, AMD's CPU does not support it. The BIOS will not have an EPP setting item.

The above principle is suitable for all AMD AM2 and AM2+ motherboards, and the same is true for AM3 motherboards, but the memory is DDR3, and Intel's DDR3 memory is XMP expansion mode, which AMD does not support.

Dual-channel, preferably two identical. It's not the same, it's easy to be unstable.

Pretty much my amd5200+ (65nm).

Start with 2g sticks.

Later, another 2g was added.

Performance hasn't improved much.

Whether the AMD processor is necessary to group memory dual channels depends on the configuration to determine.

1. If it is configured as AMD processor + independent GPU, it is not recommended to build dual channels.

The dual-channel memory bandwidth is extremely limited, but the dual-channel memory will increase the cost and occupy an additional memory slot.

2. If it is configured as AMDAPU processor + integrated display, it is recommended to set up dual channels.

Dual-channel can greatly increase memory bandwidth, minimize the performance loss caused by processors and integrated graphics competing for memory bandwidth, and the economy allows for a greater increase in the recommended selection of matching high-frequency memory.

The full name of dual-channel is dual-channel memory control technology, which can effectively increase the total bandwidth of memory and adapt to the needs of data transmission and graphics card processing of the processor. The dual-channel DDR has two 64-bit memory controllers, and the dual 64-bit memory stack provides the same bandwidth as a 128-bit memory stack.

AMD's 64-bit CPU, due to the integrated memory controller, can see whether it supports memory dual-channel depending on the CPU. At present, AMD's desktop CPUs only support memory dual-channel with 939 interfaces, and 754 interfaces do not support memory dual-channel. In addition to AMD's 64-bit CPU, whether other computers can support dual-channel memory mainly depends on the motherboard chipset, which is described above, and you can also check the motherboard chipset information.

In addition, some chipsets theoretically support dual-channel memory modules of different capacities, but in practice it is recommended to use two memory modules with the same parameters as much as possible.

Memory dual channels are generally required to be used in pairs according to the color of the memory slots on the motherboard, and some motherboards also need to be set up in the BIOS, which will be explained in the motherboard manual. When the system has achieved dual channels, some motherboards will have a prompt when they boot POST, so you can take a closer look. Since the self-test is relatively fast, you may not be able to see it.

Therefore, it can be viewed with some software, and many software can be checked, such as CPU-Z, which is relatively small. In the "memory" field, there is a "channels" item, and if the word "dual" is displayed here, it means that dual channels have been implemented. Two 256M memory will work better to form a dual channel than a 512M memory, because one memory cannot form a dual channel.

Because there is no need to write it, AMD has integrated memory controllers more than a decade ago, and all of them support dual-channel.

Intel's is also fully supported, and high-end CPUs also support three-way and four-channel.

It's like if you buy a bicycle, you don't need to write in the description of the bicycle: it has 2 wheels. Because that's already the most basic building block.

As long as the CPU you bought is not a product from a decade or twenty ago, you don't need to worry about that.

Dual-channel, in fact, is just a snake to add a snake, the performance is just a little bit improved, and it can be supported at present

The first question: 4000+ supports dual-object surplus channels.

The second hidden problem: Intel is not the only dual-channel technology. Intel's dual-channel technology is completed by the dual-channel controller on the main version, while AMD's previous 939 and current AM2 CPUs are integrated with dual-channel controllers inside the hood CPU, which shortens the time compared to Intel's approach.

CPU is supported and keyed, and the next thing to see is that your motherboard supports it, but the motherboard you buy now is definitely supported, and it is a good support to talk about virtual o( o Don't worry, rest assured that the dual-channel handle!

It's not that AMD doesn't support it, but it supports it better.