To understand the brand of memory, we have to talk about the brand of memory chips in memory first, which is very important for the quality of memory. It can be said that the memory quality of a good memory stick is definitely good.
Generally speaking, memory chips are mainly produced in Europe, America, Japan, South Korea, China and Taiwan Province Province of China. There are many high-quality memory chips produced by manufacturers in various regions, but the quality requirements of memory chips in Europe, America and Japan are more stringent, so their memory chips are mostly used in brand-name machines. In order to "take care of" the quality, the output of some brands of memory chips is generally small, so the price is relatively expensive, and it is generally difficult for domestic users to buy them. On behalf of manufacturers, there are Meguiar, NEC and Hitachi. Memory chips made in South Korea and Taiwan Province Province of China are common commodities in the domestic market, especially the memory chips of Hyundai Company of Korea are the main force in the domestic market. It can be said that most of the domestic memories are HY memory chips. HY memory chips are characterized by large output, high cost performance and low price. For ordinary domestic users, it is recommended that you choose. In addition, Samsung's memory quality is better and it is welcomed by DIY users. Taiwan Province WINDBOND, South Asia, ELITEMT and other memory chips are also common in the domestic market, characterized by low price and good quality.
With memory chips and "simple" technology, many manufacturers with a little strength can produce finished memory. Speaking of memory brands, besides those produced and sold by HY, NEC, Samsung and other manufacturers, we have to mention a company named Shengchuang KINGMAX in Taiwan Province Province. Because of its special packaging form and manufacturing technology, its memory overclocking performance is good, which is welcomed by DIY users who like overclocking. But I personally think that the compatibility of KINGMAX memory is very poor, and it can't be used normally on many motherboards, but perhaps the author's DIY level is poor. Another company named Jinbang Jill, whose product "Gold Bar" is also very popular in China, provides the best service for life-long replacement.
Therefore, we should not only look at the brand of memory chips, but also look at the brand of memory when purchasing memory. Because there are many manufacturers of memory in the world, large and small, powerful and not powerful. When choosing a brand, it is mainly to see that manufacturers who pay attention to brand benefits generally put their own company's product logo on memory sticks, but some small factories produce "popular articles", which is not the case. Of course, it should be noted that brands are not all.
1. Do what you need.
For most users, when purchasing memory, they should decide according to their own needs and do what they can. Although the famous products are good, the price will definitely be unusual. The key to purchasing memory is practicality and stability. For example, for DIY users who like overclocking, ordinary PC 100 memory will definitely become one of the bottlenecks that affect their computer overclocking. For ordinary home users or office users, there is no need to choose a "Millennium bar" or "gold bar" to use, which will probably not bring you any benefits.
2.PC 133
The most intuitive advantage of the memory of PC 133 is that it improves the memory speed, while keeping the frequencies of 33MHzPCI and 66MHzAGP unchanged, which has better manufacturing process requirements and so on. As for the memory of PC 150, to put it bluntly, it is the best memory of PC 133 or the defective memory of PC 166. The performance has not changed substantially, but the price is much more expensive. For most users, including the standard memory of PC 166, it is not a good choice for you so far, and of course you are crazy about DIY.
3. Counterfeiting "Tell the truth"
Pay attention to the following points when purchasing a memory: First, the appearance of the memory requires uniform solder joints and neat wiring, and the handwriting printed on the memory chip should be clear and smooth. Anyone who finds obvious grinding marks or fuzzy and rough handwriting on the surface of the memory stick should be carefully selected; Secondly, the surface of the circuit board should be smooth, uniform in color, with no obvious burr at the edge, bright with golden fingers and a certain thickness; Thirdly, it is also important to know some memory card numbers and common sense of anti-counterfeiting. Here are some of the best-selling anti-counterfeiting knowledge of HY and KINGMAX on the market.
Why the logo on modern SDRAM chips usually has two formats. One is HY of HY original factory, such as HY57V658010tc-10s; Gms produced for the acquired LGS, such as GM72V6684 1GT75.
Hy 5X xx xx xx xx-xx: HY stands for modern products, followed by 5X stands for chip type, 57 stands for general SDRAM, and 5D stands for DDR SDRAM；; The second X represents the working voltage, with a blank of 5V, "V" of 3.3V and "U" of 2.5V；; The 3rd-5th X represents the capacity and refresh rate, as follows: 16= 16Mbits, 4kref64=64Mbits, 8kref65 = 64mbits, 4kref; 128= 128Mbits，8K Ref 129= 128Mbits，4K Ref； 256=256Mbits， 16K Ref； 257 = 256 megabits, the 6th and 7th x of 8K Ref represent the data bit width output by the chip, and 40, 80, 16 and 32 represent 4, 8, 16 and 32 bits respectively. The 8th X represents several banks in the memory chip, 1, 2, 3 represent 2, 4 and 8 banks respectively. Is the power relation of 2; The 9th x is generally 0, which stands for LV TTL (Low Voltage TTL) interface; The 65438th x can be blank, or it can be a, b, c, d and other letters. The later, the newer the kernel. 65438th+065438th+0th X is "L", which means low-power chip, and blank represents ordinary chip; X 12 and X 13 represent the packaging forms, which are as follows: JC: 400 mil SOJTC:400 meter TSOP-II; TD: 13mm TSOP-ⅱ； Tg:16mm tsop-ii. The last digit is the speed: 7 = 7 ns [143mhz]; 8 = 8 ns〔 125 MHz〕； 10p =10ns [PC-100cl2 or 3]; 10s: 10n s〔PC- 100 CL3〕 10: 10n s〔 100 MHz〕； 12: 12 ns〔83 MHz〕； 15: 15 ns [66 MHz] and so on. For example, the common Hy57V6580 10tc-10s, HY is a modern chip, 57 represents SDRAM, 65 represents 64Mbit and 4K refreshcycles/64ms, the next 8 represents 8-bit output,10 represents 2 Bank, C represents the kernel of the fourth edition, and TC represents 400 mil TSOP.
The chip format of HY's LGS factory is GM72V2XXX 1XT/X-XX. The first two xx's represent capacity, 16 is 16MB, 66 is 64MB, and 28 is 128MB. The last two xx represent the speed: 7 =143mhz (PC133); 7.5 = 133 MHz(PC 133)； t-H = 133 MHz(PC 133)； 8 = 125 MHz； t-S = 100 MHz(PC 100)； 7K= 100MHz(CL is 2, PC100); ); 7J= 100MHz(CL is 3, PC100); ); 10K= 100MHz(PC66 specification). It can be seen from the above that-10K is not a product of PC 100, nor are -7J and -7K products of PC 133, and the performance of -8 is better than that of -7K and -7J. The most common products on the market now are PC65438 and T-H [HY] with a mantissa of 75 [GM].
KINGMAX memory also sells well in the market and is welcomed by overclocking enthusiasts. We can distinguish it from the following points: first, we adopt a special TINYBGA packaging form with a "strange" shape, and use general packaged memory to prevent counterfeiting; Secondly, recognize the trademark of KINGMAX, the words on the genuine KINGMAX memory stick are clear, the colors are uniform, and the fakes are blurred; Thirdly, REV 1.2 is better than REV 1. 1, so I suggest you choose it. Finally, we have an understanding of KINGMAX memory through three numbers in KINGMAX memory, that is, the tag number PC 133 of KINGMAX memory generally starts with MPG and ends with 1, while PC 100 generally starts with MPC and ends with 0; The chip number of KINGMAX memory is generally KSV 88438+033, while the chip number of PC 100-07 is KSV884T4A0-08 or KSV884T4A0-07. KINGMAX's circuit board number PC 133 generally starts with 9950 or 995 1, but PC 100 does not.