Points of purchase: From the "frequency" of memory [on]
As the FSB800MHz processors such as P42.4C and P42.8E have dropped to the 11XX element price, 800MHz has become the absolute mainstream of the mainstream user installed, and DDR400 memory has also become standard.
But for many overclocking users who want to further exert system potential (if you want to overclock P4 2.4 overclocking to 2.8GHz or even 3.2GHz), the current DDR400 memory is difficult to meet their needs, so choose a higher frequency memory or superior DDR400 memory also became a step-by-step selection when this type of user is installed.
First, purchase points
There are more attention to the high frequency (overclocking) memory.
New memory
● Under the memory of "frequency"
Generally, overclocking enthusiasts need to understand, access time (quote) determine the operating frequency of the memory (number), and the operating frequency of the memory is the standard specification of the memory. DDR memory data double transmission, such as DDR333 memory is running at standard 166MHz frequently 333 MHz. In addition, it is possible to see how much the memory after memory, such as -7 and -7.5 nanoseconds,, for example, DDR266, generally DDR333, is generally DDR333, for example. 5 nanoseconds are typically DDR400 memory, and the DDR500 memory is used. However, the DDR memory specification approved by the International Memory Organization has only four standards of DDR200, DDR266, DDR333 and DDR400.
There are three current high-frequency (more than DDR400) memory. One is the memory of high frequency particles, which is very rare in this memory (although some brand memory is known as the memory particles of -4 nanoseconds, "said individuals believe that it is a brand factory in purchasing original manufacturers. Remark is ground after the particles); one is a more frequent frequency of the particle overclocking to a higher frequency and still named by DDR400, representing the product such as the DDR400 memory using "Hynix" D43 particles, which is generally easy to easily Used over frequently to DDR500, compared to some DDR500 memory, it is also more advantageous; purchase points 2: from memory "frequency" off
One is used to overclock over frequent frequency to higher frequencies, and the particles used in DDR433-566 are used in memory, and their particles are generally higher than those of the DDR400 "overclocking". The author believes that the overclocked DDR400 memory and DDR433 above the market is not because the high-level gap between the DDR433 is not because the name is the difference in the price. The key is to look at the selected Whether the particles are the same, so everyone does not have to be too annotent on frequencies in the frequency when choosing high-frequency DDR memory (and therefore fans), and more should look at their CAS values (see below).
A famous HYNIX D43 particles
Samsung TCCC particles
In addition, when buying memory, many people know that DDR400 memory and DDR333 are similar to the price of DDR400 memory and DDR333, so that the DDR266 is only the DDR266 or DDR333 memory, the memory is preferred. At present, there is a very chaotic price in the DDR400 or more high frequency. Some overclocking memory quotes and DDR400 memory are similar, "add no increase", such as modern original DDR500 memory, its price and DDR400 memory is similar, choose it is definite Cost-effective
Some of the prices have been named after DDR433 or more (once again), in fact, the memory strips of DDR433 or more frequencies are based on DDR400 specification, but it uses better memory particles and strengthening. The purpose of heat dissipation, voltage, etc. to improve its operating frequency), undoubtedly use it is not cost-effective. Everyone can prefer a product in cost performance. In addition, it still needs attention when choosing high frequency DDR memory, and each manufacturer's name is not only confusing, but also some miscellaneous high-frequency bars are mixed, which generally makes hands and feet on memory particles, by polishing the standard value on the granules. Low high, such as changed 5NS particles to 4NS (some of the products of some brands), pretending to high frequency strips with water, so you need to pay attention to the number of true particles, the value is first through the laser. Its writing is clear, and the change in the change of the change or the fuzzy in the granules should be cautious. Optional points 3: CAS value is an important parameter for high frequency memory
● The CAS value is an important parameter for high frequency memory.
Memory has a CAS (CL) delay time value, one of the important parameters of memory. CAS is a column address strobe, the Chinese name is the column address gate pulse. Everyone knows that when there is stored information, it is like a big form, and all stores in memory through the line (COLMN) and columns (ROW). Information positioning, CAS is how many clock cycles can find the corresponding position, and the speed is of course, the faster, the more performance is, the higher the performance.
The current DDR memory mainly has 2, 2.5, 3 three CAS values, the smaller the frequency of the same frequency, the smaller the product, such as the product performance of the DDR333 memory value is preferably 2.5, the same, DDR333 memory value 2 product performance is definitely not lost to a product of DDR400 memory value of 2.5. At present, most of the ordinary DDR400 memory is more than 2.5 products, so you can prefer the product of the CAS value of 2 when selecting DDR400 and above, the same principle, even if everyone is not overclocking, everyone can choose the DDR433 CAS. Products having a value of 2.5, then reduce the DDR400 CAS value of 2.
Apacer memory CAS value is 3 products
The same principle, DDR500 memory CAS is 3 its performance is not as good as the DDR400's CAS value of 2, or the two of the products of the manufacturer is just the same, but it is only a frequency labeling method and name difference (like the same Memory products, some manufacturers will be marked as DDR400, CL = 2, while others are marked as DDR500, CL = 3, in fact, their performance is the same, so everyone should not light when buying in-memory, The CAS (CL) value should be seen.
To identify the frequency of memory and the CAS value of the manufacturer's memory is difficult to determine whether it is standard or trusted by subjective. For this case, we recommend that you can view its SPD information with HWInfo32, CPU-Z, SiSoft Sandra, etc. If you are authentic memory, you can clearly display the CAS values that you can achieve at this frequency. Hybrid memory generally does not display SPD content correctly.
Of course, to check if a memory can reach the manufacturer "known", you can adjust it to this frequency or CAS value in the BIOS to see if it can run normally in Windows, of course, You can also use a memory test software called "DOCMEMORY DIAGNOSTIC" to test the memory, and anything that cannot pass is definitely named, you can replace it. Purchase points 4: Select high-frequency memory defense fakes more important ● Select high-frequency memory for counterfeiting more important
First, in choosing high frequency (overclocking) memory, the first choice of brand memory is required. There are generally Micron (Meikailong), Infineon (original Siemens), and SEC in the brand in the market. (Samsung), HY (Modern), Toshiba (Toshiba), ETRON TECH, the particles of manufacturers such as WinBond, and these manufacturers have a good memory quality, everyone can Preferably.
In addition, for some manufacturers, the package pattern of memory particles in memory granules will affect the memory performance. Personal does not think that the encapsulation style of memory particles does not greatly affect the performance of memory, such as modern 256MB DDR500. Memory particles use a 0.13 micron process, while launching three different package versions of FBGA, TSOP, and QFP, which is exactly the same, and everyone should be confused when purchasing memory.
With memory chips, plus simple manufacturing, many more powerful manufacturers can produce finished memory. Some miscellaneous memory will be re-polished with waste memory, or from waste memory, some merchants will reinstate the low frequency memory strips to maribize high-frequency products. This is, although a memory uses HY production memory chip, it is not equal to HY (modern) company, it may come from a small factory or even at all, "Holidays", etc. Discern.
With the author's experience, there is no formal box, there is no factory in the brand manufacturers on the PCB board, the model, the model, the product has no formal brand label, and the method of resolving the brand memory and the miscellaneous memory is simple. You can see if it has a standard "packaging", the packaging of regular products has the following elements: product model, product description, installation instruction manual, product guarantee, barcode, origin, and some in line with standard boxes. In addition, a memory with several merchants on a memory may also be a problem memory.
Indicate complete
In addition, the brand's genuine memory PCB is smooth, the color is bright, the component welding is complete, the solder joint is uniform, the edge is neat and no hair; the inferior memory PCB takes insufficient feelings, gray, components The welding quality is rough, the patch resistance capacitance is leakage, the solder joint is seven zero eight, the wiring is not neat - everyone can discover, the resistance on the brand memory, the number of capacitors can guarantee the memory stability; in order to save costs; , The capacitance of the miscellaneous memory, the electric resistance is very small, many of the patch resistance units of the patch resistor, which should have, which should be empty, which can save it, and it is necessary to "overclock" or "high frequency" It must be empty talk over again.
