Today, I went to Zhongguancun with a friend's motherboard, I found that Nanqiao chip burned (MSI motherboard), asked about the previous South Bridge, there is an over-electricity protection, now there is no, this problem comes from the front-end USB port (that is, the front wiring board), So everyone must pay attention to this problem if it is to buy DIY machine, it is best to buy an extension line from the back, so avoid loss
ZT: Guide: The news from various channels proves that this 865 motherboard bridge burning phenomenon is universal, not a single brand of single model. After a large number of investigations in this week, the reporter took the lead in disclosing the deficiencies of the Intel South Bridge chip, causing a significant problem of continuous burning of well-known brands 865 motherboards.
The news from various channels has proved that this 865 motherboard Southbridge burning phenomenon is generally existing, not a single brand of single model.
With the intervention of the media, more and more users are eager to understand the truth. In this case, the attitude of related manufacturers has become a key.
Yesterday, the most timely timely MSI MSI, the most timely, the most timely, the official website has issued an explanation of "South Bridge burning". The following is the latest news from MSI:
South Bridge burns, concentrated on two models of ICH4, ICH5. The incidents of the burning South Bridge have occurred earliest in the mid-2004, but it has appeared in October.
Most computers are using a USB device when the fault occurs. These include DV, cameras, mobile hard drives, U disk, MP3, printers. Only a min number of users do not use a USB device.
The specific fault is: sudden cracks in normal use, the restart is not bright; crack the machine when plugging in the USB device, and the restart is not bright.
At the same time, MSI found that all brands of Intel mainstream motherboards have a problem of burning bridges, only depending on the extent of the sales size.
Technical analysis of electrostatic discharge is a disaster
By investigating MSI discovery South Bridge Bible, it is basically a random and accidental phenomenon. For example, using a U disk may be caused, but cannot determine which ultimate failure will cause the South Bridge to be burned.
It is only an electrostatic discharge (ESD) that caused this random destroyed South Bridge. The harm of static electricity on the PC, which is common in the past, restarting and other phenomena.
In the current USB2.0 system, there is a phenomenon of burning bridges. Because the equipment of various USB interfaces is now popular, such as DV, cameras, mobile hard drives, U disk, MP3, printers, etc. Because the USB device can be hotly swapped, the user will always touch the interface, there is a strong electrostatic discharge (ESD).
According to IEC 61000-4-2 test standards, the human body is in contact with metals, and the generated instantaneous voltage can reach 7000 volts. This voltage is sufficient to burn relevant electronic components. The USB controller and USB-HUB are in the South Bridge, so it shows that the South Bridge burns.
The standard requirements for USB digital consumer products and USB peripherals must have ESD protection, and must comply with EMI standards. There is also an ESD protection device on the front USB jack of the connecting chassis. However, early USBs in the domestic market, USB peripherals basically have ESD protection. This is the root cause of the South Bridge burns.
Now this problem has attracted attention, began designing and producing equipment related to ESD protection, used for USB digital consumer products and USB peripherals, as well as on the computer motherboard. MSI will also add ESD protection measures to the motherboard.
Deep reason 865 motherboard why?
When the original popular USB1.1 device, the South Bridge has not exposed. The main reason is that the digital consumer product of the USB interface is rare at that time; the USB (1.0 / 1.0) is low-speed transmission, and the simple EMI suppression circuit can be reached.
USB 2.0 is a high-speed data signal transmission device, and the technology of USB1.1 is no longer applicable. As for the EMI suppression circuit and the ESD protection device for USB 2.0 being developed. Intel is also proposed in the relevant documents, and does not specify the circuit and device.
In fact, ICH4 and ICH5 South Bridge have USB 2.0 control functions. Intel said in their 865 and USB 2.0 Design Guide, the ESD protection device is placed on the front USB PCB board of the chassis, but the PCB board in front USB in the domestic chassis is not controlled by the motherboard factory, many of them are made by some small plants. (Or chassis factory) design. The latter rarely consider the issue of ESD. One of these important reasons, Intel did not design the ESD design for the pre-USB PCB board, just said that the test does not affect the USB signal. On the other hand, the VIA's South Bridge is better for USB2.0 controllers and HUB design, anti-ESD ability. So very few phenomena of VIA's motherboard burning bridge.
In combults, the mainstream motherboards that can be burned in the use of Intel ICH4, ICH5 South Bridge now. Especially the two bridge chips produced after September.
Reduce Tips for MSI to users
Because this Intel Nanqiao issue involves chip processing, motherboard wiring design, USB equipment improvement, etc., it is impossible to resolve it in the short term. In this case, MSI reminds users to make the necessary self-prevention.
1. When inserting the USB device, it is best to release static electricity. Access to the grounded metal release static, then touch the metal portion of the USB plug to release static electricity through the human body.
2, try not to buy a low-end USB device, transmission line, USB digital consumer product. Nowadays, high-end generally have ESD protection. Nothing is lowered. ESD will indicate: industrial-grade anti-static protection technology (PLL), such as Hanfang U disk.
3. For long-term use of comparative USB devices, such as printers, try not to carry out electrical plugging.
4, the power line is preferably connected to it. It is the best grounding of the intermediate jack of the three-core socket to be released by the releasing chassis.
It is understood that a lot of work has been made after the problem exposes. The first is a sudden after-sales service request for all over the world, and the MSI has toned for a new product worth hundreds of thousands of new products, ensuring promptly fulfilling the service of users. At the same time, the urgent use of users is anxious, and in a month ago, they launched a wide range of investigations.
MSI technology takes the lead in finding the root source and is looking for a solution. Professional engineers have already proposed a number of programs. At the classification test, as long as the test passes, it will be put into production immediately, and it is possible to provide users with perfect products, maximize the protection of users.
We believe that this responsible attitude of the company's well-known large factory will help to solve the crisis of this burst. ~ ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ ~~~~ About how to be responsible, the general seller will pull the skin but it doesn't matter. You are staring at him. He tells you 7 days new product, how many dayful products, you said, you must get a new board. When they come back, they want you to find a home, you follow, but you don't talk to them, they don't have anything to do, sell you, not them, this is a strong, there is new, However, this is the bottom policy. After all, there is a problem with the problem that the domestic DIY chassis is not in line with international standards, so there is a problem.
