Common memory failures

1, the fault of the judgment and treatment

Due to improper memory installation or serious quality problems often lead to "memory alarm", is one of the most common memory failures. When the power-on, hear is not usually "beep" of a sound, but "beep, beep, beep ..." rang nonstop, the monitor also has no image display. This failure most of the time because the computer's use of the environment is not good, humidity is too large, in the long-time use process, the memory of the gold finger surface oxidation, resulting in memory gold finger and memory socket contact resistance increases, blocking the current through the memory self-test error. This type of memory failure is obvious and can easily be confirmed and resolved by reinstalling or replacing additional memory strips. After removing the memory, should pay attention to carefully use anhydrous alcohol and rubber on both sides of the gold finger scrub clean, and do not use hand direct contact with gold finger, because the hand sweat will attach to the gold finger, in the use of a period of time will again cause gold finger oxidation, repeat the same failure, installation can be more than a few memory slots. In addition, we also apply brushes to remove the dust from the memory slot, then fold it with a hard, clean sheet of paper and move it back and forth in the memory slot to allow the sheet to wipe the metal from the memory slot and then install the memory bar. At the same time to carefully observe whether there are chips burned, circuit board damage traces. In addition, some old memory (such as Edo memory), must be used for installation. The Rambus memory must be plugged into a memory slot on the motherboard for normal use, and if it is not full, a dedicated "string" with a Rambus shape will need to be plugged into an idle slot.

Due to poor memory quality or damage caused by the system work is not stable failure, is the computer repair process, encountered the most problems. For example, the system frequently "screen crashes" and "registry corruption" errors or Windows often automatically enter the security mode and so on. For example, when encountering "registry error", we can enter Safe mode, type "MSCONFIG" command in the Run, remove "V" in front of Scanregistry in "Startup" item, and then restart the computer. If troubleshooting, the problem is really caused by a registry error, if the fault persists, it is basically possible to conclude that the machine memory problems, you need to use the replacement method, the performance of a good memory bar to verify the existence of the same failure. Sometimes, without defragmenting the disk for a long time, and without error checking, a system error is prompted for the registry error, but for such problems, the system can run normally when "scanregistry" is disabled, but the speed can be significantly slower. Troubleshooting this type of failure in addition to replacing the memory bar, you can also first try to adjust the memory parameters in the motherboard BIOS. If the memory quality is not up to the requirements set in the BIOS, it will make the memory work in an unstable state, it is recommended to reduce the number of CAs, RAS and other parameters in the BIOS. If your memory is not a brand-name product, it is best to select "SPD", or "auto-detect mode" by default. In SPD mode, the system automatically obtains the information from the memory SPD chip, so in theory, the working state of the memory is the most stable at this time.

In most memory synchronous operating modes, the memory runs at the same speed as the CPU FSB. However, many motherboards now support "Asynchronous memory speed", which means that there are some differences in the operating frequency. Take the typical via KT333 motherboard as an example, enter the BIOS and find the "DRAM clock frequency" option, which is "Host clock (bus frequency and memory operating frequency synchronization), hclk-33m (bus frequency minus 33M), hclk+33m ( Bus frequency plus 33M) and so on three kinds of modes. If the memory work is not stable, of course, you can set the memory speed lower.

2. Handling of compatibility failures

Memory is one of the most easily upgraded accessories in your computer. Because the computer we use is a combination of products produced by different manufacturers, incompatibility becomes the most important issue for users. Due to improper upgrade, it will lead to the system work is not stable, memory capacity is not fully recognized, and even can not boot a series of failures.

During the upgrade process, memory mixing tends to be problematic, one of which is due to the mixing of single and double-sided memory. Double-sided memory tends to occupy two "banks", while some older motherboards may have compatibility issues (such as older motherboards like Intel's lx/bx/810/815), which can only recognize half the capacity. On the single, double-sided memory of the understanding also want to say two more sentences, in fact, their own no good or bad points, the difference is very small, but the most important thing is to see which package is supported by the motherboard chipset better. The undeniable point is that the same capacity of memory, single-sided than the integration of two sides higher, production date to rely on, so work up more stable. In addition, we are concerned about whether two different specifications of the memory bar can be used in the same motherboard, in fact, different manufacturers, different models, different speeds of memory can be used together, but the stability of the system has a certain impact, in particular, will affect the overclocking performance. Therefore, users in the use of two or more than two of the memory bar, should try to select the same brand and model of the product, so as to minimize the memory stripe incompatibility phenomenon. If you cannot purchase the same products as the original memory, should try to use the market word-of-mouth better brand memory, they are generally subjected to rigorous special matching and compatibility testing, in components, design and quality can meet or exceed industry standards. Of course not all brand memory strips have good compatibility. Again, the use should be noted in the motherboard BIOS on the memory parameters can be set to be conservative, such as in the case of DDR266 memory and DDR400 memory mix, the various memory parameters can be set according to DDR266 requirements, and the SPD function should be disabled, so as not to cause confusion.

In addition, we often speak of "dual-channel memory" is actually a motherboard chipset technology, and memory itself does not have much of a relationship. Currently, there are two-channel technologies, including Nvidia's NFORCE2 and Intel's i865/i875 chipset. In the i865/i875 motherboard to implement dual-channel memory technology, must use the same size and capacity of two or four memory. You can establish a dual-channel mode only if you strictly press dimm1+2 (the motherboard has only two memory slots), Dimm1+3, Dimm2+4, and dimm1+2+3+4 Four ways of memory installation. And in the NFORCE2 series motherboard on the formation of dual-channel memory mode, memory capacity and even models do not have strict requirements, with two or three of memory can be, as long as the memory is guaranteed DIMM1, DIMM2, DIMM3 in any position inserted in one or two memory, can open the dual channel. Very convenient to use. After setting up the dual channel mode, we can see the identity of the dual channel memory in the BIOS information at boot time.