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【速搜问答】显存容量是什么

问答 admin 3年前 (2020-06-17) 588次浏览 已收录 0个评论

汉英对照:
Chinese-English Translation:

显存容量是显卡上显存的容量数,这是选择显卡的关键参数之一。显存容量决定着显存临时存储数据的多少,主流的是2GB、4GB、8GB的产品。新显卡已经能达到1TB的显存容量(Pro SSG)。

Memory capacity is the number of memory capacity on the card, which is one of the key parameters to select the card. The capacity of video memory determines the amount of temporary data stored in video memory. The mainstream products are 2GB, 4GB and 8GB. The new graphics card has reached 1TB of memory capacity (pro SSG).

显存容量是显卡上显存的容量数,这是选择显卡的关键参数之一。显存容量决定着显存临时存储数据的多少,显卡显存容量有 128MB、256MB、512MB、1024MB 几种,64MB 和 128MB 显存的显卡已非常少见,主流的是 2GB、4GB、8GB 的产品。现如今最新显卡已经能达到 1TB 的显存容量(Pro SSG)。

Memory capacity is the number of memory capacity on the card, which is one of the key parameters to select the card. The capacity of video memory determines how much data is temporarily stored in the video memory. There are 128MB, 256MB, 512MB and 1024MB of the capacity of the video card. 64MB and 128MB of the video card are very rare. The mainstream products are 2GB, 4GB and 8GB. Now the latest graphics card has reached 1TB of display memory capacity (pro SSG).

功能

function

显存容量的大小决定着显存临时存储数据的能力

The capacity of video memory determines the capacity of temporary data storage

在显卡最大分辨率方面,最大分辨率在一定程度上跟显存有着直接关系,因为这些像素点的数据最初都要存储于显存内,因此显存容量会影响到最大分辨率。在早期显卡的显存容量只具有 512KB、1MB、2MB 等极小容量时,显存容量确实是最大分辨率的一个瓶颈;但主流显卡的显存容量,就连 128MB 也已经被淘汰,主流的娱乐级显卡已经是 2GB、4GB 或 8GB,某些专业显卡甚至已经具有 1TB 的显存,在这样的情况下,显存容量早已经不再是影响最大分辨率的因素。

In the aspect of the maximum resolution of the graphics card, the maximum resolution is directly related to the display memory to a certain extent, because the data of these pixel points are initially stored in the display memory, so the display memory capacity will affect the maximum resolution. In the early days, when the video memory capacity of the graphics card was only 512KB, 1MB, 2MB and so on, the video memory capacity was indeed a bottleneck of the maximum resolution; however, the video memory capacity of the mainstream graphics card, even 128MB, has been eliminated. The mainstream entertainment level graphics card has been 2GB, 4GB or 8GB, and some professional graphics cards even have 1TB In this case, the video memory capacity is no longer the factor that affects the maximum resolution.

性能

performance

在显卡性能方面,随着显示芯片的处理能力越来越强大,特别是大型 3D 游戏和专业渲染需要临时存储的数据也越来越多,所需要的显存容量也是越来越大,显存容量在一定程度上也会影响到显卡的性能。例如在显示核心足够强劲而显存容量比较小或较慢的情况下,却有大量的大纹理贴图数据需要存放,如果显存的容量不足以存放这些数据,那么显示核心在某些时间就只有闲置以等待这些数据处理完毕,这就影响了显示核心性能的发挥从而也就影响到了显卡的性能。

In the aspect of the performance of the video card, with the processing power of the display chip becoming more and more powerful, especially for large-scale 3D games and professional rendering, more and more data need to be temporarily stored, and the required memory capacity is also becoming larger and larger. The memory capacity will also affect the performance of the video card to a certain extent. For example, when the display core is strong enough and the display memory capacity is relatively small or slow, there are a large number of large texture map data to be stored. If the display memory capacity is not enough to store these data, the display core will only be idle at some time to wait for these data to be processed, which affects the display core performance and thus the performance of the video card 。

要素

essential factor

值得注意的是,显存容量越大并不一定意味着显卡的性能就越高,因为决定显卡性能的三要素首先是其所采用的显示芯片,其次是显存带宽(这取决于显存位宽和显存频率),最后才是显存容量。一款显卡究竟应该配备多大的显存容量才合适是由其所采用的显示芯片所决定的,也就是说显存容量应该与显示核心的性能相匹配才合理,显示芯片性能越高由于其处理能力越高所配备的显存容量相应也应该越大,而低性能的显示芯片配备大容量显存对其性能是没有任何帮助的。例如市售的某些配备了 512MB 大容量显存的 Radeon 9550 显卡在显卡性能方面与 128MB 显存的 Radeon 9550 显卡在核心频率和显存频率等参数都相同时是完全一样的,因为 Radeon 9550 显示核心相对低下的处理能力决定了其配备大容量显存其实是没有任何意义的,而大容量的显存反而还带来了购买成本提高的问题。

It is worth noting that the larger the memory capacity does not necessarily mean the higher the performance of the graphics card, because the three factors determining the performance of the graphics card are firstly the display chip used, secondly the memory bandwidth (which depends on the memory width and memory frequency), and finally the memory capacity. How much memory capacity a video card should be equipped with is determined by the display chip it uses. That is to say, the memory capacity should match the performance of the display core. The higher the performance of the display chip is, the larger the memory capacity it is equipped with because of its higher processing capacity. The performance of the display chip with low performance is not affected by the large memory capacity Any help. For example, some commercial radeon 9550 graphics cards equipped with 512MB large capacity video memory have the same core frequency and video memory frequency parameters as those of 128MB video memory, because the core frequency and video memory frequency are the same The relatively low processing power of the display core determines that it is meaningless to equip it with large capacity video memory. However, large capacity video memory also brings about the problem of increasing the purchase cost.

应用

application

大小选择

Size selection

工作站显卡所用的显存容量一般都在 2GB 以上。

The display memory capacity of workstation graphics card is generally more than 2GB.

对于选择多大的显存容量合适,这取决于多种因素,比如应用的环境和硬件的相互制约关系,但通常来讲可以参考下面公式:

It depends on a variety of factors, such as the mutual restriction between the application environment and hardware, to choose the appropriate amount of video memory capacity. However, generally speaking, you can refer to the following formula:

显存容量=显示分辨率×颜色位数/8bit。

Display memory capacity = display resolution × color bits / 8bit.

比如显示分辨率基本都是 1024×768,颜色位数为 32bit,那么需要的显存容量=1024x768x32bit/8bit=3145728 byte,可是这针对是 2D 显卡(普通平面),如果是 3D 加速卡,那么需要的显存容量为 1024x768x32bitx3/8bit=9437184byte=9.216MB,这是最低需求,而且还必须增加一定的容量作为纹理显示内存,否则当显示资源被完全占用时,计算机只有占用主内存作为纹理内存,这样的二次调用会导致显示性能下降,因此作为真正的 3D 加速卡显存容量一定大于 9.216MB。工作站显卡显存都在 64MB 以上。比如 2D 绘图应用,即使在 1600×1200 的情况下,它也最多是 1600x1200x32bit/8bit=7680000byte=7.5MB,如果是三维绘图比如 3D Studio Max,那么容量需求是 7.5×3=22.5MB,不过这是最低需求,因此 32MB 容量的显存是应付这类 2D 绘图或者娱乐的视频播放、普通三维设计。对于工作站而言,由于运行更大的软件,更大的运算,所以显存至少应该在 64M 以上。

For example, if the display resolution is basically 1024 × 768, and the number of color bits is 32bit, then the required memory capacity = 1024x768x32bit / 8bit = 3145728 byte, but this is for 2D graphics card (ordinary plane). If it is 3D acceleration card, then the required memory capacity is 1024x768x32bitx3 / 8bit = 9437184byte = 9.216mb, which is the minimum requirement. In addition, a certain amount of capacity must be added as the texture display memory. Otherwise, when the display resources are fully occupied, the computer only occupies the main memory as the texture memory. Such a secondary call will lead to the display performance degradation, so the display memory capacity as a real 3D acceleration card must be greater than 9.216mb. The display memory of workstation graphics card is over 64MB. For example, for 2D drawing applications, even in the case of 1600 × 1200, the maximum is 1600x1200x32bit / 8bit = 7680000byte = 7.5mb. For 3D drawing, such as 3D Studio MAX, the capacity requirement is 7.5 × 3 = 22.5mb, but this is the minimum requirement. Therefore, 32MB of video memory is used for such 2D drawing or entertainment video playback and general 3D design. For workstations, because of running larger software and larger operation, the display memory should be at least 64M.

GDDR5 显存

Gddr5 memory

技术发展

technological development

在显卡技术领域,随着 GPU 性能的逐步提升,显卡对显存带宽的需求也与日俱增,而 GDDR3 显存已经无法满足下一代 GPU 的需求。为此芯片厂商推出了 GDDR4 显存颗粒,遗憾的是,相比 GDDR3 而言,GDDR4 并没有彻底解决功耗和带宽问题,而且成本过于昂贵。芯片厂商则直接跳过了 GDDR4,转而发展 GDDR5 显存颗粒,与 GDDR3 显存颗粒相比,GDDR5 具有哪些特点呢?

In the field of graphics card technology, with the gradual improvement of GPU performance, the demand of graphics card for video memory bandwidth is increasing, and GDDR3 video memory has been unable to meet the demand of the next generation GPU. For this reason, chip manufacturers have introduced GDDR4 memory particles. Unfortunately, compared with GDDR3, GDDR4 does not completely solve the problem of power consumption and bandwidth, and the cost is too expensive. Chip manufacturers directly skip GDDR4 and develop gddr5 memory particles. What are the characteristics of gddr5 compared with GDDR3 memory particles?


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