The difference between the public and the non-public version of graphics

What is the most fundamental aspect of the public version? What is the definition of Non-public edition?

First, the public version. The public version refers to Nvidia or ATI at the beginning of the new release, the original design (or authorized design) of the PCB version, and designated OEM manufacturer's graphics card. The biggest role of the public version of the graphics card in addition to the rapid spread of goods occupy the market, there are strict control of the graphics card quality, maintain market prices, establish the role of brand image. The common feature of the public version of the graphics card is luxurious materials, high cost and expensive price.

Again, non-public version of the video card. In addition to the public version, the other manufacturers of their own design is not public version of the PCB. Compared to the public version of the graphics card, in the PCB design, the material made a big change, some non-public version of the graphics card is the product of cost compromise, and some is to strengthen the public version of the video card is insufficient places, such as heat dissipation, product features, interface design, and so on, non-public version of the cartoon often have their own unique.

What is the difference between the public and the non-public version of the design?

The public version of the graphics card is in the beginning of the GPU, in a variety of electrical properties have not been excavated thoroughly when the design. At that time the GPU production is not mature and stable, the public version of the graphics card using extreme conservative, extreme pursuit of stability design, is reasonable. Based on this design idea, we only see the general's ceramic capacitors, tantalum capacitors, SMD inductors and other luxury materials. Based on the "wilderness effect" (Don't tell me you don't know!), the expensive materials do not bring with the price of the absolute corresponding electrical performance. When the electrical index of a component reaches a stage and wants to rise a little bit of performance, the cost will be very great. The cost of the public edition is mostly spent on these expensive materials. Overall, the public version of the potential is very good, such as the public version of Overclocking is often the most excellent, usually can significantly exceed the default frequency, but expensive. Of course, the public version is not necessarily the best, such as the original 8800GT, there are 4850, they do not need me to say it?

In contrast, the non-public version of the design is much freer. After the public edition fully fills the market in exchange for time, the general's later electrical performance tests and more complete and accurate product design guidance parameters will emerge clearly. At this point, the brand card manufacturers will have more time to test the product. At the same time, designers will launch costdown according to market demand (cost reduction, such as Sotec 9800gtx+ debut commemorative version, 4850 Platinum, 4850 Polaris) and costup (increased cost, 4870 fire drill 512M First batch, 4850/4870 ICEQ4 earlier version, MSI a 9800gtx+, model forgotten) version.

The difference between the public and the non-public edition is more than the following:

1.PCB different materials

The public version of the PCB design products are as far as possible to leave ample space, and for stability at all costs. So the public version of the PCB length, the number of layers often leave a surplus. For example, the public version of the 9800gtx/gtx+, using code-named P392 10-layer PCB board, the length of 26.7 cm. Such a long and many layers of PCB, bring not only excellent electrical performance, but also high cost. The cost is almost one-fold higher for each layer of 2 floors.

So the same period of the Non-public version of the product using how many layers of PCB to complete the design of 9800gtx+? 6 floors. On the market most Non-public edition 9800gtx+ only has 6 layer PCB. In the hands of experienced electronic designers, for G92 this 256bit-bit wide chip 6 or 8-layer PCB is enough, and performance and stability and the public version is not much different.

In contrast, 128bit-bit-wide graphics cards require only 4 layers of PCB, such as 4650. And a bit more than 256bit, you must consider 8 layers, or even 10, 14 PCB. Admittedly, more PCB layer can provide higher signal purity, can effectively improve the high-frequency operation of electromagnetic interference and suppress clutter. At the same time, the number of PCB layer more video card overclocking ability is often stronger. But considering the market demand and the cost of compromise, the Non-public version of the PCB in the number of layers have to reduce the province.

2. Different parts of the electricity supply

Public version of the graphics card power supply, there are few or no upright electrolytic capacitors, no larger full closed inductance, often a large number of ceramic capacitors, tantalum capacitors, or even directly using the "Integrated Numerical Control power supply module" This expensive power scheme (4870 public version, 4870x2 public version).

In the case of 260+, NVIDIA data shows that the 260+ core requires at least 97W of power supply, the voltage is about 1.2V, that is to say, at least 90A of the current. In any case, the public version of luxury, the purpose is to meet the 260+ demand for electricity. According to the power supply design, up to 90A of current demand, one phase power supply is unable to meet the need for multiphase power supply solutions.

In the entire power supply scheme, MOSFET (metaloxide semicoductor field Effect transistor, metal oxide semiconductor field effect tube. is made of metal, oxide, semiconductor three kinds of materials ——— call, the full name is really TMD long ...) The choice is more important, MOSFET is the whole power supply circuit in the biggest heating components, power supply circuit is largely subject to its high fever, rather than its current capacity. With the common model of 50n035 MOSFET, it has a maximum of 52A of current through the ability, but in fact only use 25A, because the operating temperature at 52A 150 degrees Celsius, very high temperature will seriously image the surrounding parts of the normal work. In the usual design, the supply current of each phase is only 30A, the general control in 25A. In addition, each phase not only with "one into one out" two MOSFET (mostly low-end public version or some non-public version), there is also a number of MOSFET schemes for "one in (out) two out (in)" and even "binary two out" to reduce temperature and average current.

According to each phase power supply 25A capacity calculation, 4-phase power supply can meet 260+ core power supply needs. In fact, the P654 public version is the 4 phase of the core power supply scheme (the old 65nm260 use 3 phase of the core power supply, but more powerful materials, PMW chip is also better). P654 version of the materials in the material is also relatively luxurious, a large number of ceramic capacitors, SMD-type inductors, and so on, excellent performance and expensive.

In contrast, non-public version of the products used in most of the use of solid-state capacitors with ordinary half dust or sealed inductance. This scheme is used for a long time and is mature and stable. Because the majority of the Non-public version of the 4 phase to the 6 phase of the design, power supply capacity relative to the public version is not inadequate.

In general, because the graphics card power supply scheme has become a mature and reliable design, a short period of time there is no breakthrough in technology, so the public and non-public version of the difference between the design of the supply of materials tightly left. No matter black cat, White cat, catch the mouse is the truth of a good cat I believe we all understand, but you are looking at the public version of the material is uncomfortable, then I have no way ...

3. Other materials of different parts

Other material? What are other parts? Simply, turn the video card over, look at the back, those small resistor capacitors.

In this regard, the public version of the design is very cautious (n/A high-end graphics card is particularly obvious). The material on the back of the video card is commonly known as "small material", which is usually a capacitor, resistor and other components. Most of these components are not directly responsible for the performance of the graphics card, and do not participate in the signal processing. The significance of their existence is: to ensure that the graphics card important chips (GPU, memory, power supply PWM chip, etc.) security. One of the more important is: overload protection circuit, overcurrent protection circuit, the core graphics card, video memory voltage control, and some filter circuit.

Non-public version of the graphics card in this area is usually omitted a lot, especially some protection circuit. In the normal operation of the graphics card, the current has been filtered before entering the core and video memory, and there is a protection circuit in the power supply section. However, if the public version of the power supply circuit damage, protect the circuit to start, the chip is fine, but to return to plant maintenance, non-public version of the power supply circuit damage, damage to the chip, or to return to plant maintenance. After all, still have to return to the factory ...

In addition to the above design, the public version of the 2D output better, because the public version of the complete Low-pass filter circuit, allowing users to use analog output when the maximum elimination of signal interference, output more pure signal to the monitor. Rather than the public version usually simplifies or even removes low-pass filter circuit. However, in the digital interface now, how many people with analog interface? Special needs I have nothing to say ...

4. Radiator design and other functional design

Radiator aspect, the public version of the radiator is mute as the first, thermal performance is in the mute behind. For example, the public version of 4850, to achieve 80 high temperature when the fan speed is still only 30%. (This ....) More embarrassing ...) Non-public version? Double heat pipe, large fin? The usual, full street are; three heat pipes, two fans? OK. Don't disobey, others 280/4870x2 also three fan +5 Heat pipe! (AC new 280/4870X2 Special radiator has been used by manufacturers, the number of heat pipes hope to remember correctly)

Interface, this ... The public version is mostly double dvi+tv-out ... A few have HDMI, not public version ... Basically say anything you want.

Features, this aspect of the Non-public version again, a key overclocking, dual bios, voltage jumper, water-cooled, knife card version, all mute version, high-frequency version ... Too much......

5. Stability design and other

Often have players said: The public version of the stability is not good, the public version of the better.

First of all, regardless of the right and wrong, say: What is stability? Stability refers to the number of times a single object's fault is directly or indirectly caused by an object during a certain period of time in the system. To be statistically stable, all the factors that are in the system except for the parts to be tested are excluded. How can we rule out other factors of influence? For example, the game blue screen, crash, restart, many players do not want to blame the graphics card, but memory, drive, hard disk, System virus, and other reasons may cause the above phenomenon, how to be independent of the graphics card is very important and extremely difficult. That being the case, what is the practical significance of talking about stability? Of course, some products listed after the flower screen, the temperature is too high, not normal use, etc., both public and non-public version have appeared. In the fault, the exclusion of other factors, from the materials used alone, the public version of the probability of failure is undoubtedly higher. Why? From the probability, the more the number of components, the higher the probability of failure, is not it?

To sum up:

Public edition

Advantages: Strong, even can say luxurious materials, bring unparalleled stability, excellent electrical performance, as well as the use of luxury materials brought about by the powerful overclocking power, occupy the motherboard slots (up to two slots), as well as the listing speed

Disadvantages: Expensive (the consequences of luxury materials ...), not personalized, single function, some products mute can, but the heat dissipation is not flattering, some products default frequency is not enough to play the core of all performance

Non-public version

Advantages: Most cheaper than the public version, the default high-frequency, good heat dissipation, product selection, you can find suitable for their products, good heat, the appearance of beautiful

Disadvantage: The workmanship is not enough public version (except for the actual Super public version), can not be on the common integrated water-cooled head (Er ...). This is more far-fetched ...), some of the high-end graphics card work or design than the lower end of the graphics card (for example, 4850 Platinum version, the core power to do in the DVI interface, the personal view is not acceptable), some costdown version shrink shrink to let people chilling but not price!