Which parameter of the graphics card is most important?

Of course, the most important thing in the graphics card is the graphics chip (GPU), and the processing speed of the GPU plays a decisive role in the performance of the graphics card. In the case of the same GPU, the video memory has a significant impact on performance. Nowadays, there are many types of video memory of graphics cards, DDR2, DDR3, DDR4 can be seen on the graphics card, and the cost of DDR4 must be higher than DDR3 now, and of course the performance is also higher.

Of course, there may also be graphics cards with the same memory parameters, 256M** is more expensive than 512M. There are probably several reasons for this:

1.Under the current mainstream 3D game resolution conditions (1280*1024 or 1650*1050), the 256M graphics card is enough to cope, and the 512M does not have a great performance advantage. The embodiment is that the 3DMark scores are almost the same;

The brand or workmanship of the graphics card is better than that of 512m, and this is the main reason.

The most important thing for a graphics card is the core specifications, which include most of the performance parameters, the number of transistors, the number of pipelines (stream processors), frequency, etc., followed by the auxiliary core facilities, such as the number of video memory, interface speed, particle performance, frequency, etc., and other important ...... such as PCB wiring, number of layers, power supply, quality of electrical components, etc

The most important thing is the chip of the graphics card (such as 8500gt chip, 8600gt chip), and then the core frequency of the chip and the frequency of the video memory.

Look at the bit, look at the video memory, look at the core frequency, and also see if it is a brand.

The graphics card is also very important in the operation of the computer, which is directly related to the display effect, such as color, clarity, etc., of course, the display is also needed, and no matter how good the graphics card is without the display, it is in vain. The graphics card is equivalent to the human eye, with the effect of visual display, and the graphics card is divided into two types, integrated display and independent display.

Integrated graphics can also be called integrated graphics. Integrated graphics cards generally do not have video memory, and use a part of the main memory of the system as the video memory capacity, and the specific amount is generally dynamically adjusted by the system according to needs. Obviously, if you use an integrated graphics card to run a lot of memory-intensive space, the impact on the entire system will be more obvious, and the frequency of system memory is usually much lower than that of a discrete graphics card, so the performance of an integrated graphics card is inferior to that of a discrete graphics card.

But if you don't play big games, if your motherboard and CPU are not very bad, then its integrated graphics card is enough for you, and it can fully meet your daily needs.

Several major indicators of the graphics card.

1. The core of the graphics card depends on the manufacturer's indicators.

2. Frequency, low frequency such as 100m--600m, the higher the better.

3. Bandwidth, 64bit, 128bit, 256bit, 512bit, 1024bit, the higher the better.

4. Video memory, DDR1, DDR2, DDR3 (the larger the number in the back, the better), 512M, 768M, 1G, 2G, the later the better.

5. The workmanship (brand) is good.

Graphics card parameter weights.

Number of cores, SP unit, memory particles, bit width, manufacturing process, memory frequency, memory size.

1. The equivalent ratio of the number of SP units of N card and A card is 1:5

Second, the equivalent bit width of GD5 memory particles is twice that of GD3.

3. Based on GD3 memory particles, the size of the memory is 2-4 times the bit width.

A simple way to tell if a graphics card is good or bad.

1. Look at the memory particles, DDR3 or DDR5. The higher the frequency, the faster the speed, DDR2 has been eliminated, and many so-called 512M brand machines are DDR2.

2. Look at the bit width, the higher the bit width, the faster the speed is theoretically, but the equivalent bit width of DDR5 is twice that of DDR3. (The highway is not wide, but it is much better than the city road).

Note: The bit width is equal to the road, and the memory particles are equal to the vehicle speed. The flow of a section of road is composed of two parts: (1) How wide is the road? (2) How fast is the car?

3. Look at the GPU core, the higher the GPU frequency of the same specification model, the faster.

4. Look at the GPU model, the higher the number, the stronger the performance.

5。See the workmanship, solid state capacitors? Is the PCB version of the cable clear and reasonable? Thermal design? What is the style of the board?

Public and non-public graphics cards.

The purpose of the public version of the graphics card is to give the best performance to the graphics core, so the cost will not be considered in terms of materials and accessories, but the cost will be considered when it is really sold in the market. Therefore, even if the graphics card manufacturer directly sells the public version of the graphics card, it has removed some "things" under the premise of stability. Or redesign a non-public graphics card that can give better play to the performance of the graphics core and take into account the cost.

1.The role of video memory.

The relationship between the video memory and the display core is very similar to the relationship between the CPU and memory, and the display core stores the data after processing or during the processing into the video memory, and the data is either output or extracted from the video memory when the display core needs it. From this point, students can see how important the frequency of video memory is, so in order to improve the performance of the graphics card, manufacturers have used their brains in video memory again.

2.Memory frequency, bit width, and capacity are all important.

The core manufacturers will not stipulate what frequency of video memory the graphics card manufacturers use, but only make some suggestions on the official information, so the video memory collocation is very flexible. DDR2, GDDR3, GDDR4 are currently available on the market, and GDDR5 will be available in the future. They are frequented more and more frequently from generation to generation in order to make the performance even stronger.

For example, if the DDR2 frequency exceeds it, it is good, but GDDR3 has reached the highest level, and the gap is quite large. It's just that the heat generated by high frequency is not small, so many graphics card manufacturers have to consider video memory when choosing a heat sink.

If we compare video memory to a warehouse with a display core, then frequency indicates the speed at which items (data) are sent to the warehouse, the bit width is the door of the warehouse, and the capacity is the storage capacity of the warehouse. If you want to make the warehouse (video memory) contain more things, the capacity must be large; In order to make the speed of loading things fast, the speed (frequency) of sending things must be increased; The width of the door of the warehouse should also be appropriate, and the three parameters should not only be reasonably matched, but also take into account the display core.

As a rule of thumb, it is recommended that when buying a mid-range graphics card (such as an AMD HD3650 or NVIDIA GeForce 8600 graphics card), a video memory capacity of 256MB and a bit width of 128 bits are sufficient. Mid-to-high-end graphics cards such as AMD HD3850 or NVIDIA GeForce 8800GT require more than 256MB of video memory and no less than 256bit bit width. These parameters can basically be found on the product manual and the label of the graphics card.

Generally, it looks at frequency, bit width, and video memory.

Let's take a look at the core codename, core chip, core bit width, SP stream processor, video memory particles, and video memory capacity, in order.