【 Weak current College 】 notebook purchased four misunderstandings (go)-Power By 【 China power house network 】

· Myth 1: too much CPU L2 cache and FSB

The current Intel mobile processor family from low-end to high-end arrange in order: Atom (Atom) solo--Celeron dual-core--Pentium dual-core-core 2 Duo. However, this does not mean that the high level of performance we will be stronger, for example, high-frequency version Pentium dual-core of effectiveness it is possible to go beyond the low-frequency version of core 2 Duo.

We all know, the processor performance is determined by several parameters together. According to our experience, these parameters are tested on the importance of the processor performance from highest to lowest order: kernel schema > core frequency > > FSB L2 cache.

Now occupy the mainstream market is 45nm dual-core processors — from Celeron dual-core to core 2 Duo T3000 T9000, they have exactly the same core architecture: code-named Penryn cool ruiwei schema. The main difference is that in the low-end processors in the L2 cache and FSB has been streamlined.

Common notebook processor performance comparison of parameters and

To Pentium dual-core T4200, for example, many people would subjectively determined: "it's L2 cache only the core 2 Duo T6400, its effectiveness is certainly far less than the latter", this view is one-sided. In fact, because they are exactly the same core architecture, the core frequency will play a decisive role. According to our testing experience, clock speed equivalent to Pentium dual-core performance only behind core 2 Duo 3% to 5%.

See where you might be asking: "dual-core Pentium, and Celeron are so strong that core 2 also how do you sell?" here we talk about Intel's product strategy: on the one hand, it hopes to attract consumers choose profitable in high-end processors, on the other hand, the need in the low-end market long suppressed AMD, therefore cannot allow Pentium, and Celeron dual-core performance is too weak. From the last few years of market performance, Intel's this strategy really outweigh the disadvantages.

My personal favorite type of processor is a dual-core CULV, their performance is close to the Pentium dual-core, but the power consumption of less than 30% of the latter, can effectively reduce the heat, and the notebook battery life time. Its disadvantage is that the price is too expensive, the notebook price most million. But the good news is that in order to give the next generation Centrino platform give way, these prices CULV duo will in the coming years gradually reduced.

Here the way explain, Intel T series processor power consumption are 35 Watt, P series are 25 Watts, L series-17, U-series mostly 10 Watt (SU3500 5.5 Watts). If these models with another single letter s, he adopted the small packaging technology, smaller size of the processor, means that you can design your notebook slimmer.

Earlier we said core architecture is the most important parameters of the processor, Intel is at the same clock speed of performance-leading AMD, is to benefit from advanced cool ruiwei schema. In the Intel Penryn family, and the Merom are cool, but Penryn Ruiwei schema is an improved version of Merom, it will update from 65-nanometer manufacturing process to 45nm, slightly elevated L2 cache and FSB, and increased the SSE4.1 multimedia instruction sets (lift HD decoding capability), so there is a slight performance boost. Since July of last year was released, now Penryn has underlying replaces the Merom, become mainstream notebook is the most common processor architecture.

For most users, the mainstream Pentium dual core is sufficient, the processor for a core 2 Duo and spend a thousand dollars is not cost-effective. Of course, if you select a single display this in high-end, or have video compression needs, or would like to extend the books of the time, then select such as P7450 in high-end processor is also acceptable. On the other hand, we also received the news that Intel will be held on 9-10, issued several new processor:

1. the price for CULV duo: fill current mid-range slim this market gap, for example, core 2 Duo SU7300 (1.20GHz, 3MB), Pentium duo SU4100 (1.30GHz, 2MB) and Celeron duo SU2300 (1.20GHz, 1MB). In terms of performance, the two preceding paragraphs rather than in the previous table, although slightly SU9300 SU2300, but also lesser than solo SU3500 intensity of 50%. In terms of power consumption, these three processors to 10 Watts.

2.Corei7 Quad: code-named Calpella new Centrino platform will be launched high-end version, equipped with the code-named Clarksfield and quad-core processor, code-named IbexPeak-M motherboard chipset (i.e. PM55). These quad-core processor based on the Nehalem microarchitecture, specific models for 920XM (2.0GHz 8MB, 55 watts,), 820QM (1.73GHz, 6MB, 45 watts) and 720QM (1.60GHz, 6MB, 45 watts). But this is just a gimmick, because for the mainstream market of dual-core version Calpella Centrino platform, you have to wait until the first quarter of next year will be published.

· Myth two: the blind pursuit of new graphics cards and large memory

Both NVIDIA or AMD-ATI, publishing new video card is launched a comprehensive set of products that cover grade low three high school, they are compared with the previous generation graphics cards in the same level product performance is slightly better, but very few will have a qualitative leap, more than one grade of old graphics — unless and compared several years ago.

For example, in the entry-level graphics, G105M for succeeding 9300MGS,Performance of about 10% of the increase, but it and the generation of high-end graphics card, still have 9600MGS 50% of the gap. Panoramic view in recent years the two giants of the renewal policy, basic follow this rule, apply different grades of video cards opened gap, thus ensuring the profitability in the high-end products.

However, this situation has recently emerged in the exception — we tested found GDDR3 Edition HD4570 graphics performance, and last generation mid-range model HD3650. The reason we think there are three main areas: 1.A card stream processor growth geometrically-, 80 and 120 stream processors and not too big in comparison; the core 2.HD4570 more frequently. Most equipped GDDR3 graphics memory 3.HD4570 and HD3650 graphics for DDR2 more.

Common laptop video card parameters and performance comparisons

Also need to add that part HD4330 graphics video card and HD4530 realizes only 32bit, that is, we often say "castration Edition" video, their performance and 64 versions will lag compared to approximately 35%.

It is not a new video card performance is definitely better, also it is which grade products. So, how should we tell? is simple, its graphics memory bandwidth. On the notebook, the video memory bandwidth for 64bit and 32bit of all for the low end graphics card, in the middle and high-end 128bit video card, video card for top-level 256bit (product less expensive).

For example, the current common low-end graphics have HD4330, HD4570, G105M, etc., common in high-end video cards have HD4650, GT130M, top video card you have HD4870 and GTX280M. According to our tests, memory bandwidth is the most important video card parameters, it is recommended that you buy books with the latest version of the Everest or GPU-Z software testing.

In addition to the graphics memory bandwidth, other important parameters: stream processor, core/memory frequency and memory capacity. In-stream processors, N card and A card design schema is different, so we can't simply compare quantity: N card performance gains and increase in the number of stream processor is equal proportion, but A card presenting a curve — to maintain performance linear lifting, streamer must increase geometrically type.

And processor clock speed, graphics core frequency and memory frequency is also very important, especially the memory frequency in this parameter, it is closely associated with the video memory type: DDR2 memory equivalent frequency only 800 ~ 1000MHz GDDR3, which is up to 1400 ~ 1600MHz, graphics overall 30% increase in performance. (Note: here is the video of independent memory, not the system memory. DDR3 memory compared to DDR2 memory performance boost is not evident).

Appropriate graphics memory capacity is necessary, but not too much – test data indicate that, when the memory capacity of more than two times the memory bandwidth, no matter how many more are not too large. For example, in the low end graphics card with 64bit 128MB video memory is enough, in the high-end video cards with 128bit 256MB video memory is enough. But the reality is that most notebook graphics card is equipped with four times and even eight times in the video memory (because it does not significantly increase the cost), manufacturers are using this as a selling point, this publicity will undoubtedly mislead the consumers.

In the manufacturing process, N card and A card presenting alternate leading trends, in general the same. Last year A card was the first in the HD3000 Series 55 nm process on adoption and continuation of the current mainstream HD4000 series. While N card this year began with the 55 nanometer as transition, and in some of the latest GT200M video introduced 40 nm process. In the performance requirements and power control of contradictions in the increasingly sharp today, advanced manufacturing technology will undoubtedly be more affected by manufacturers and users of all ages.

According to the report of the ZDC, in the last three years, domestic single out this market share has been upgraded from 40% to 60%, more and more consumers are beginning to value the notebook graphics performance in the hope of getting more gorgeous 3D gaming effects, as well as a smoother HD playback experience. But on the part of consumers, sets out this still has its advantages, such as life long, low calorific value, some models are slimmer and more.

According to our testing experience, you can set display GMAX4500 play the run karting on such a simple online game; low-end single digital picture quality in normal play most popular games, such as "world of Warcraft," "shikuangzuqiu 2009", etc; only in high-end digital picture quality in a running smoothly under the 12 need for speed "the bully 4" large 3D games.

· Myth III: focus on hardware configuration and ignored his work

We note that some users too pursuing so-called price/performance ratio, it is necessary to buy the best, lowest prices for configured products. In fact, this anthology of there is a certain risk. Price-this word has many meanings, in a narrow sense is the hardware configuration and price ratio, but broadly speaking, should also include ease of use and detail work.

I will be surrounded by friends, they buy the first notebook is the only performance on, but the second part of the purchase, reason, start to pay attention to your notebook's portability and cooling — because of their daily commute to carry books, fed up with this heavy burden to bear it in summer so that heat the stove ... Therefore we recommend that you configure in the hardware, but also want to know which books are more comfortable with it — you can go to the store yourself, or you can look at the demo Forum netizens.

· Myth 4: businesses recommended notebook necessarily betterBR>
For most consumers, select their choice of notebook, can only be successful by half — the other half is the actual purchase process. Don't underestimate this only a few hours, if we do not have the necessary experience and psychological preparation, are likely to fall into the trap of traders.

We do not rule out the possibility that some merchants will really give you recommend notebooks, but this business really rare, you may not even one-tenth. The vast majority of traders are trying to get out of "transition"-recommended for another you are not familiar with the models, as consumers do not know its actual price, therefore often cheated several thousand dollars, it is very common, everyday occurrence in Zhongguancun.