Different bit widths for the same graphics card? Similarly, why does the graphics card have a video

Manufacturers like to use 64bit or 128bit can be.

64bit can be regarded as a shrunken version.

This is related to the memory particles, for example, a single is 16bit, and 4 is 64bit, and 8 is 128bit

For the same 32 bits, 4 will be 128 bits, and 8 will be 256 bits

I can't see the picture.,Do you always think the screen is wide, and that 64 should be the existing capacity, t t.

This is a normal phenomenon, the core is the same, the memory bit width is different, and the performance of the graphics card will be different, which is used for market segmentation. This practice is also available for n cards. However, this phenomenon is relatively rare, and it can only be said that you were too careless and did not look carefully at the relevant parameters.

HD5470 uses 64bit bit width, and the 128bit one is likely to be a modified graphics card, and the performance will be greatly improved if the bit width is doubled, but I don't seem to have seen 128bit, and it would be better if you could compare these two graphics cards. If there is basically no difference except for the bit width, of course choose the 128bit one.

Open a very vivid analogy, the bit width is like the highway, the wider the road, the more vehicles can pass at the same time (relative to the same speed of the car), the most obvious example is the memory group dual channel, such as a 128M bit width of 2G memory and 2 128M 1G memory dual channel, the rear bit width is 128 * 2 = 256, so it simply improves the performance, but the memory bit width in the performance is not big (mainly capacity, core frequency, external frequency), So don't worry too much about it.

This is a different version launched by manufacturers according to different market needs, such as GTX750, under normal circumstances, 1G of video memory is enough, but playing large 3D games requires 2G of video memory. Video memory is only one of the factors in judging the performance of a graphics card, and you also need to refer to other filial piety factors when buying a graphics card: video memory bit width:

The bit width of the video memory refers to the number of bits of data that can be transmitted in a cycle, and the larger the number of bits, the greater the amount of data transmitted in a short period of time, so the video memory is one of the important parameters of the graphics card. There are 64 bits, 128 bits, 256 bits, and 512 bits of memory width. The higher the memory bit width, the better the performance of the graphics card.

Frequency: Frequency is the speed at which the graphics card processes data, is the speed at which data is exchanged with the GPU, the unit is ns or MHz, 1ns=1000 1MHz, the faster the frequency of the video memory, the more channels there are, the larger the amount of data that can be processed at the same time, and the better the performance of the graphics card. Memory bandwidth:

Memory bandwidth is one of the indicators to measure the data transmission rate between the display chip and the video memory, generally speaking, the higher the bandwidth, the faster the data transmission speed, the unit is byte seconds. With the same frequency, the performance of the graphics card with higher bandwidth will also be better. Stream Processor:

The stream processor is the pixel rendering pipeline and vertex shading unit, also called the SP unit, the role is to process the data split chain transmitted by the CPU, and convert it into a digital signal that can be recognized by the display after processing, of course, the higher the stream processor, the better. Comments.

In the case of the same memory frequency,The width and height of the memory bit of the coarse tanka will have a performance call to lift,Of course,This is not absolute.。。 As far as the core performance of the current graphics card is concerned, rock chain tung. 256bit is enough.

As for the graphics card, does the landlord want to use a professional graphics card?

That's not necessarily, it depends on what kind of graphics card your host is suitable for, too high graphics card machine is not good, Bi Zai will use Qi Tangerine, if you want a good graphics card, it will generally be 512, but you must see if your machine is suitable for it!

HD5870 Blaupunt, Dilan, can be 1600 stream processors, you can't just look at 256bit, you look at the memory frequency, that's Bu Wu GDR5, it's DDR1, 4 times the type of Meng, or DDR3, if you want to make a picture, it is recommended to buy a professional card, don't buy a game card.

It's best to use Intel CPU with an N card to make pictures, GTX260 280 290 are all high-end,

The bit width of the video memory is the number of bits of data that can be transmitted by the memory in a clock cycle, and the larger the number of bits, the greater the amount of data that can be transmitted in an instant, which is one of the important parameters of the video memory. At present, there are 64-bit, 128-bit, 256-bit and 512-bit or higher graphics cards on the market, and people are accustomed to calling 64-bit graphics cards, 128-bit graphics cards, 256-bit and 512-bit graphics cards refer to their corresponding memory bit widths. The higher the memory bit width, the better the performance**, so 512-bit wide video memory is more used in high-end graphics cards, while today's mainstream graphics cards basically use 256-bit video memory.

As you know, the memory bandwidth is 8, so in the case of the same memory frequency, the memory bit width will determine the size of the memory bandwidth. For example, if the same memory frequency is 500MHz for 128-bit and 256-bit video memory, then their memory bandwidth will be: 128-bit 500MHz*128 8=8GB s, and 256-bit 500MHz*256 8=16GB S, which is twice that of 128-bit, which shows the importance of memory bit width in video memory data.

The video memory of the graphics card is composed of blocks of memory particles, and the total bit width of the video memory is also composed of the bit width of the memory particles. Memory bit width Memory particle bit width Number of memory particles. The memory particles are equipped with the memory number of the relevant manufacturer, you can go to the Internet to find its number, you can understand its bit width, and then multiply it by the number of memory particles to get the bit width of the graphics card.

This is the most accurate method, but it is more cumbersome to implement.

The size of the video memory is generally only 2 times the width of the video memory bit (for example, a 128-bit graphics card only needs 256MB of video memory is enough), otherwise blindly increasing the video memory will not get a performance improvement.

I guess it's the same thing.

After all, the current products are all score-level, and if the low-end graphics card uses a bit width of 256bit, the performance is actually very good. However, this will cause confusion in the grade, and the demarcation between low-end and high-end parameter indicators is not clear, which will affect the mid-to-high-end products.

There is also an impact on the grading of performance.

The performance of a graphics card is determined not only by the size of the video memory and bit width, but also by the number of stream processors and the number of raster units, core frequency, and so on.

The number of stream processors in low-end graphics cards is small, and the ability to render pixels is not strong.

Therefore, the bit width of 128 bits is enough for some graphics cards like 9400gt, 4650, etc., and the bit width is wide, and it is useless to keep up with the filial pixel rendering.

Three important metrics: capacity, frequency, and memory bit width.

1.capacity (256mb, 512mb, etc.).

The video memory is responsible for the data exchange between the system and the graphics card and the data cache when the display chip is computing 3D graphics, so the video memory capacity naturally determines the amount of data that the display chip can process. Theoretically, the larger the video memory, the better the performance of the graphics card. However, this is only a theoretical calculation, and the actual performance of the graphics card is constrained by many factors, such as:

Display chip speed, memory bit width, memory speed, etc.

2.Video memory frequency (about 400 in the low level, 600 to 1000 in the intermediate level, and 1000 or more in the advanced level).

3.Video memory bit widthVideo memory bit width is a very important parameter of video memory and graphics card. It means the amount of data that a graphics card can process in a cycle.

Obviously, in the case of the same memory speed (working frequency), the larger the bandwidth, the greater the data throughput and the better the performance. As far as the more common graphics cards are 64bit and 128bit are concerned, it is obvious that in the case of the same frequency, the data throughput of 128bit video memory is twice that of 64bit (which cannot be reached in actual use), and the performance will be greatly enhanced.

Let's make an image analogy, your video memory is equivalent to a water tank, the video memory width is equivalent to the mouth of the water tank, the data is the water, the memory frequency is the flow rate of the water, your water has to enter the water tank after processing out, that is not the water tank is relatively large, the caliber is large, the water flow speed is fast, and the water will not be crowded.

Now think carefully, according to the definition of memory frequency, bit width, and more, we can get a new physical quantity bandwidth = memory frequency * bit width 8 It indicates the amount of data transferred by the graphics card per unit time, in the case of sufficient video memory, the larger this value, the better the performance of the graphics card.