CPU as the sign of computer development, had been under the attention of people.
Whether desktop computer or notebook computer samsung r528 series laptop cpu fan, people when the choice must first consider the CPU is what kind of. Because of Intel violent advertisement publicity, the Chinese idea of computer mark is Intel CPU.
In the past, CPU speed on the performance of the whole computer plays a vital role, with the development of technology, the machine performance bottleneck is no longer the CPU. The same class CPU in performance won't have very big difference, such as Intel 1.6 GHz CPU and 1.7 GHz CPU for an ordinary users it reflects performance won't be a big difference, perhaps simply can't feel it change, more than a memory to improve the performance of the effect is good.
0.1 GHz for user machine performance won't have greatly improved, but manufacturer merchants will take it as a big selling point, often in the price, will be more than one hundred yuan or hundreds of yuan even nearly one thousand yuan. In the machine when the choice, CPU only choice as a standard, for the CPU samsung r540 series laptop cpu fan speed without overstretch, in the same class last in line. Because still need to consider the price. Avoid "big horse car" the waste of resources.
In our impression, both desktop computer or notebook computer, the CPU choice, there is no doubt that Intel is first selection. Indeed, Intel in these respects do very good, also because of its excellent cover our eyes, only see its shining point.
In fact, we ignore many excellent products, for example, AMD CPU, transmeta CPU, VIA CPU. They have distinguishing feature each, and Intel together share the processor this huge market.
AMD is the first laptop computers launched 64 - bit CPU samsung r560 series laptop cpu fan, and AMD CPU has high performance-to-price ratio. Transmeta although launch soon, but because of its unique processing mode and low voltage power consumption performance of low quantity of heat quickly application in light ultrathin laptop computers. SONY C1 series is the most classical application. VIA "Chinese core" -- han who processor, although there is no one like Intel, AMD so powerful processing function, but its low calorific value is low-end notebook computer the best choice.
In addition to special CPU used in laptop computers beyond, still some manufacturers association use desktop computer CPU samsung r580 series laptop cpu fan. For the current technology to do so is feasible, because laptop and desktop computer difference is that the problem of heat and power consumption. If can solve the problem of heat and power consumption, the price will and use special CPU notebook computer a slightly different, for user is beneficial. The most important thing is not to be deceived by illegal dealers, the desktop CPU notebook when special CPU notebook.
The desktop CPU notebook samsung r60 series laptop cpu fan whichever manufacturers, in common is a bit thick, a little heavy, one-sided said the only way to guarantee the stability of the system. Another characteristic is its working current, he was in the COMPAQ EVO N1000V speaking, it USES is desktop Pentium 4 2.0 CPU, power adapter output rated voltage of 18.5 V (belong to normal), rated current 4.9 A (belong to higher). So, a use desktop computer CPU notebook computer rated power nearly 100 w, and use special CPU notebook computer rated power to more than 60 w.
http://chargerbattery.blogdetik.com/2012/08/26/what-is-the-plate-load-sound-card/
http://wholesalemerchandise.blogstreet.co.uk/uncategorized/what-is-the-plate-load-sound-card.html
Sunday 26 August 2012
CPU level 2 cache capacity
CPU Cache (Cache Memoney) is located in between CPU gateway mx6438 laptop cpu fan and memory of the temporary memory. Its capacity than the memory is small, but exchange faster. The data in the buffer, only a small part of memory data, but it is a small part of the short time CPU will visit, when the CPU call a large number of data, it can avoid the memory cache call directly from, so as to speed up the reading speed. Thus it can be seen, the CPU to cache, it is a kind of efficient solutions. In this way, the whole internal memory (cache + memory) becomes a cache of both high speed and memory of the large capacity storage system. The cache to CPU performance influence. Mainly because of the CPU's data exchange between order and CPU and cache the bandwidth of the cause.
The working principle of the cache, is when the CPU to read a data, the first from the cache find, if found, immediately read and gave CPU processing; If not found, with the relatively slow speed from memory and CPU gateway mx6440 laptop cpu fan processing to read, but at the same time, the data in the data block to tune in to the cache, can make later to block the data read from the cache, don't have to call memory.
It is such a read mechanism, make the CPU reads cache hit is very high (most of the CPU can be up to 90%), that is to say, the CPU next to the data read 90% are in cache, only about 10% need to read from memory. This will save the CPU directly read memory time, also make the CPU reads data without waiting for basic. Generally speaking, the order of the CPU reads the data, is first cache, after memory.
The earliest first CPU gateway mx6447 laptop cpu fan cache is a whole, and capacity is low, Intel Pentium era from the start, the cache are classified. At that time the CPU integrated in the kernel of cache has not enough to meet the needs of the CPU, and manufacturing process limit, also cannot greatly improved the capacity of the cache. So there was a integrated in the same block with CPU board or on the main board of the cache, at this time, the CPU kernel integrated cache, called level cache. And external called level 2 cache. Level 1 Cache, still score according to the Cache (Data Cache, D - Cache) and Instruction Cache (Instruction Cache, I - Cache). Respectively used to store data and execute these data's instructions, and both can also be CPU access, reduce the contention Cache caused by the conflict, improve the efficiency of the processor. Intel Pentium 4 launched in processor, there are also a kind of level tracking cache, capacity of 12 KB.
With the development of the CPU manufacturing process, level 2 cache can also easily integrated in the CPU kernel, capacity are also ascending year after year. Now again with integrated the CPU internal or not to define a, level 2 cache, has not exactly. And as a level 2 cache is integrated into the CPU kernel, the previous level 2 cache and CPU gateway mx6448 laptop cpu fan big gap crossover situation was also change, at this time with the same in the main frequency speed work, can for CPU provide higher transmission speed.
Level 2 cache is one of the keys to CPU performance. The CPU core the same circumstances, increase level 2 cache capacity, can make the performance improved. And the same core CPU of high and low end points, and often is in level 2 cache on the difference. Thus it can be seen, level 2 cache for the importance of CPU.
CPU in the cache find useful data are called "hit", when no CPU gateway mx6450 laptop cpu fan cache the data (then called not hit), the CPU to access memory. Theoretically, in a have a level 2 cache CPU, read the first shot 80% in the cache. That is to say, CPU level cache find useful data, accounting for 80% of the total data, and the rest 20% from level 2 cache read. Because can't predict accurately the will execute data, level 2 cache read from around 80% (from the level 2 cache read useful data according to the total of 16%). So, and data from memory will have to call, but this is a very small proportion of the. The higher the CPU, will also carry level 3 cache, it is to read after level 2 cache misses data design - kind of cache, in has level 3 cache CPU, only about 5% of the data from memory to call, further improve the efficiency of the CPU.
In order to ensure access to CPU gateway mx6453 laptop cpu fan has higher percentage, the contents of the cache should according to certain algorithm to replace. A more commonly used algorithm, is "least recently used algorithm" (LRU algorithm), it is a recent period of at least be visited out line. Therefore, the need for each line set a counter, LRU algorithm is the hit done counter reset, and other various counter add 1. When there is the need to replace, eliminated line counter attribute the maximum data line out. This is a kind of high efficient, scientific algorithm. The counter reset process, can put some frequent after call don't need the data out in the cache, improve the utilization rate of cache.
CPU gateway mx6629 laptop cpu fan products, the capacity of the basic level cache in 4 KB to 64 KB between, level 2 cache capacity is divided into 128 KB, 256 KB, 512 KB, 1 MB, 2 MB, etc. Level 1 buffer capacity, each between products differ not quite, and secondary buffer capacity, it is the key to improve the CPU performance. Level 2 cache capacity of ascension that is determined by the CPU manufacturing process, capacity increase will inevitably lead to the increase of the number of CPU internal transistor, in limited CPU area integrated more cache, in the manufacturing process of the higher demands.
http://yaplog.jp/camera-battery/archive/15
http://batterychargerview.blog138.fc2blog.net/blog-entry-384.html
The working principle of the cache, is when the CPU to read a data, the first from the cache find, if found, immediately read and gave CPU processing; If not found, with the relatively slow speed from memory and CPU gateway mx6440 laptop cpu fan processing to read, but at the same time, the data in the data block to tune in to the cache, can make later to block the data read from the cache, don't have to call memory.
It is such a read mechanism, make the CPU reads cache hit is very high (most of the CPU can be up to 90%), that is to say, the CPU next to the data read 90% are in cache, only about 10% need to read from memory. This will save the CPU directly read memory time, also make the CPU reads data without waiting for basic. Generally speaking, the order of the CPU reads the data, is first cache, after memory.
The earliest first CPU gateway mx6447 laptop cpu fan cache is a whole, and capacity is low, Intel Pentium era from the start, the cache are classified. At that time the CPU integrated in the kernel of cache has not enough to meet the needs of the CPU, and manufacturing process limit, also cannot greatly improved the capacity of the cache. So there was a integrated in the same block with CPU board or on the main board of the cache, at this time, the CPU kernel integrated cache, called level cache. And external called level 2 cache. Level 1 Cache, still score according to the Cache (Data Cache, D - Cache) and Instruction Cache (Instruction Cache, I - Cache). Respectively used to store data and execute these data's instructions, and both can also be CPU access, reduce the contention Cache caused by the conflict, improve the efficiency of the processor. Intel Pentium 4 launched in processor, there are also a kind of level tracking cache, capacity of 12 KB.
With the development of the CPU manufacturing process, level 2 cache can also easily integrated in the CPU kernel, capacity are also ascending year after year. Now again with integrated the CPU internal or not to define a, level 2 cache, has not exactly. And as a level 2 cache is integrated into the CPU kernel, the previous level 2 cache and CPU gateway mx6448 laptop cpu fan big gap crossover situation was also change, at this time with the same in the main frequency speed work, can for CPU provide higher transmission speed.
Level 2 cache is one of the keys to CPU performance. The CPU core the same circumstances, increase level 2 cache capacity, can make the performance improved. And the same core CPU of high and low end points, and often is in level 2 cache on the difference. Thus it can be seen, level 2 cache for the importance of CPU.
CPU in the cache find useful data are called "hit", when no CPU gateway mx6450 laptop cpu fan cache the data (then called not hit), the CPU to access memory. Theoretically, in a have a level 2 cache CPU, read the first shot 80% in the cache. That is to say, CPU level cache find useful data, accounting for 80% of the total data, and the rest 20% from level 2 cache read. Because can't predict accurately the will execute data, level 2 cache read from around 80% (from the level 2 cache read useful data according to the total of 16%). So, and data from memory will have to call, but this is a very small proportion of the. The higher the CPU, will also carry level 3 cache, it is to read after level 2 cache misses data design - kind of cache, in has level 3 cache CPU, only about 5% of the data from memory to call, further improve the efficiency of the CPU.
In order to ensure access to CPU gateway mx6453 laptop cpu fan has higher percentage, the contents of the cache should according to certain algorithm to replace. A more commonly used algorithm, is "least recently used algorithm" (LRU algorithm), it is a recent period of at least be visited out line. Therefore, the need for each line set a counter, LRU algorithm is the hit done counter reset, and other various counter add 1. When there is the need to replace, eliminated line counter attribute the maximum data line out. This is a kind of high efficient, scientific algorithm. The counter reset process, can put some frequent after call don't need the data out in the cache, improve the utilization rate of cache.
CPU gateway mx6629 laptop cpu fan products, the capacity of the basic level cache in 4 KB to 64 KB between, level 2 cache capacity is divided into 128 KB, 256 KB, 512 KB, 1 MB, 2 MB, etc. Level 1 buffer capacity, each between products differ not quite, and secondary buffer capacity, it is the key to improve the CPU performance. Level 2 cache capacity of ascension that is determined by the CPU manufacturing process, capacity increase will inevitably lead to the increase of the number of CPU internal transistor, in limited CPU area integrated more cache, in the manufacturing process of the higher demands.
http://yaplog.jp/camera-battery/archive/15
http://batterychargerview.blog138.fc2blog.net/blog-entry-384.html
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