15 Inch
15 Inch
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15-inch Core i7 Dell studio 15 Review
Dell studio 1557 Dell 15-inch models, the series has been launched for a long time, its excellent design and high price to win the favor of many users, the new studio 1557 is upgraded to a new i7 processor, strong The performance brought us a new studio experience.
Dell Studio 1557 used Q820QM processor analysis (A)
The new architecture of the mobile version of Core i7 processors, two for mid-major difference is that the 1.6GHz and 1.73GHz Core i7 720QM the Core i7 820QM, in addition to an extreme product to 2GHz Core i7 920XM Extreme.
The new Intel Core i7 820QM is a native quad-core design of the CPU, the Nehalem architecture, advanced, compared to the previous generation of Core 2 significantly improved and enhanced, adding to the three-level cache system, intelligent acceleration, integrated DDR3 memory controller technology.
The new mobile version of Core i7, on behalf of the core models of three-digit number after the code for the mobile platform-XM (Extreme Edition Mobile) and QM (Quad Core Mobile), respectively, represent the top mobile and quad-core mobile version.
The new Calpella platform had been conjecture as Centrino 3 platform, but Intel has decided to continue for many years played down the Centrino brand, Centrino brand will be mainly used in wireless LAN products, full of "Core" to promote the brand notebook processor platform. Beginning of a new Calpella platform for high-end mobile users, mainly dealing with quad-core, currently consists of three products Core i7-920XM Extreme, Core i7-820QM, Core i7-720QM, clocked at 2.0GHz/1.73GHz / 1.6GHz, three-level cache, respectively 8MB/8MB/6MB, all support Hyper-Threading and Turbo Boost acceleration technology, thermal design power as high as 55W/45W/45W, integrated memory controller (supports DDR3-1333)
Dell Studio 1557 used Q820QM chipset resolution (B)
Intel Core i7 820QM is a native quad-core design of the CPU, the Nehalem architecture, advanced, compared to the previous generation of Core 2 significantly improved and enhanced, adding to the three-level cache system, intelligent acceleration, integrated DDR3 memory controller technology. On the Nehalem architecture, from pre-release evaluation of server and desktop look, can be used to describe the amazing. And in the server space, Nehalem is ahead of all previous generation products, in just two quarters, Nehalem architecture of the 5500 series of sales to occupy half of the market.
Dell Studio 1557 used Q820QM memory control analysis (C)
Intel Nehalem can be described as the high hopes of not only want the server to sweep the field "glue quad-core" of the haze, on the desktop also Yiqijuechen. Steeper Intel announced Nehalem at the idea of embedded devices. 2009 IDF, Intel's first lecture is "unified computing architecture", implying: Nehalem architecture is like the DNA double helix as to ubiquitous.
The new mobile version of Core i7, on behalf of the core models of three-digit number after the code for the mobile platform-XM (Extreme Edition Mobile) and QM (Quad Core Mobile), respectively, represent the top mobile and quad-core mobile version.
Calpella platform will be based on 45nm process technology Nehalem architecture processors, that is, we have seen above products. Integrated memory controller of Calpella, North Bridge chipset without the need to access memory data, greatly reducing the memory latency on the extent of the phenomenon, and significantly increased memory bandwidth, while doubling its storage performance improvement. Pacific Internet in the previous evaluation, we see SSD hard drive on the overall performance relative to mechanical impact. In fact in the CPU, memory and hard disk echelon between the long-standing orders of magnitude performance difference, it is precisely for this reason, x86 processor, the frequency of war come to an end.
Integrated memory controller and QPI bus in the hands of Intel, has played a deadly lore effectiveness. AMD's technical director does not know this would not be vomiting blood. AMD integrated memory controller, although the initiator, but provides for the Intel Strike At Heart. Calpella platform is the biggest suspense: the integrated memory controller and QPI in high parallel server environment, allowing plenty of multiple data streams to feed the hungry heart. But the desktop, especially notebooks still have not found such a strong computing needs. Nehalem architecture will not notebook platform powerless?
The core part of the Calpella platform will be equipped with an integrated North Bridge memory controller originally - can support DDR3 memory specification of IMC, it will bring higher bandwidth for notebook and reduce overall power consumption; the other half part GFX graphics processor PCI-E bus can support external graphics, FDI can also be a dedicated graphics bus, the result will be a reality by the PCH interface output to the display device, and will include integrated graphics core GMA 4500MHD GMA 4500M and two, which is the core frequency higher, supports full high-definition hardware decoding.
PCH chip part of the new integrated South Bridge I / O functions and North Bridge Display Management Engine (ME) functions, also added NVM, Clock Buffers and other modules. It is also on this basis, Intel mobile platform in the elimination of the front-side bus (FSB) specification in favor of new high-speed convergence (QPI) specifications.
CPU's internal use of the new QPI bus to communicate. Caching system, a new three-level cache design, the introduction of the new Smart Cache intelligent caching technology, L1 and L2 cache for the kernel cache, with ultra-low latency, which by the L1 cache 32KB +32 KB instruction cache, data cache components. 256KB of L2 cache per core (256KB x 4). L3 using shared design, Core i7-920XM and Core i7-820XM capacity of 8MB, shared by all cores on a chip, in order to ensure maximum efficiency of multi-core computing.
Dell Studio 1557 used Q820QM Core Product multi-threaded and Technical Analysis (IV)
Hyper-Threading Technology (Hyper-Threading, referred to as HT), first appeared in 2002, the Pentium 4, it is the use of special hardware instructions to a computing element simulation into two logical units, so that more threads in parallel computing processor , and thus compatible with multi-threaded operating systems and software to improve the CPU efficiency. Intel is actually in a very long time to give up Hyper-Threading technology, because the memory is insufficient bandwidth, saturation physics processing unit and can not run, but also brought frequent thread switching overhead, processing performance in many cases falling instead of rising. With the memory throughput of excellence, based on the Core i7 Nehalem architecture re-introduced Hyper-Threading technology, quad-core Core i7 can handle eight threads operations, significantly enhanced its multi-threaded performance.
Hyper-Threading Technology requires only consume a small core area of the price, you can multi-task are offering significant performance improvements, compared to a physical core completely and then add it to cost much more. Compared to the Pentium 4 Hyper-Threading Technology, Core i7 is the advantage of larger cache and higher memory bandwidth, so more able to effectively play the role of multi-threading. According to the statement, Nehalem's HT may increase very little energy in the case, so that 20-30% performance increase.
World War II because of the frequency power, process and other reasons the occasion of a dead-end, multi-core has become the only way to improve performance. But like the classic theory tells us that the same calculation, based on SMP (symmetric multi-processor system) and multi-core systems, face the other two serious problems: multiple processing cores to access memory or memory has become the most prominent performance bottleneck; so that the entire software industry, especially the desktop to support parallel processing design is a much more difficult task. This is not difficult to understand first of the Nehalem architecture to be used in the server space, and in the field of desktop and mobile but half a beat slower.
Dell Studio 1557 display performance test
AMD's next-generation Mobility Radeon HD4530 graphics cards in the mainstream notebook chip, its core and Mobility Radeon HD4330, are using the 55nm process technology design, the core has 80 stream processors, DirectX 10.1 support for special effects and video support UVD2 hardware decoding engine. Mobility Radeon HD4530 can be seen as a Mobility Radeon HD4330 high-frequency version, in theory there will be some performance improvement.
AMD Mobility Radeon HD4530 full support for Microsoft DirectX 10.1 API, the Unified Video DECoder 2 technology, the hardware can provide 1080P high-definition video format playback, integrated HDMI 7.1-Channel Audio module, dual-DisplayPort module, thus providing the HDMI interface and two a DisplayPort interface, can achieve video and audio line output. Support CrossfireX technology, allowing future notebook has more gaming performance. In addition, the new core also has the ATI PowerPlay, ATI PowerXpress on ATI Switchable Graphics technology.
Dell Studio 1557 machine performance testing and configuration
Dell Studio 1557 hard testing with a single block 320G 5400 RPM hard drive to ensure the transmission rate, measured performance point of view, the drive control processor, an excellent occupancy rate, the average transmission to 69.3MB, test data, both from the transmission speed or burst read speed is very stable.
Vista machine performance, scoring a 4.7 card the bottleneck machine, after all, from the current edit've reviewed the i7 i7 laptop notebook run HD4530 is currently the lowest level of graphics.
Dell Studio 1557 use stand-alone ATI Mobility Radeon HD 4530 graphics card, 512MB memory, Memory Interface 64bit, frequency 400/600MHz, DirectX version 10.0 Shader Model 4.0, supports H.264 VC-1 HD, built-in stereo audio chip audio system , speaker for the built-in dual stereo speakers. CPU uses the Intel Core i7, Q820 frequency 1.73GHz, secondary cache 6144KB, FSB 1333MHz, standard memory capacity 2GB, Memory type DDR3.
Power Specifications:
Battery capacity: 6-cell lithium Dell Studio 1557 battery (5600mAh)
Working time: 2-3 (hours)
Power supply: 100-240V AC, 50/60Hz universal power adapter
Endurance: Medium
Summary: Dell Studio 1557 very good continuation of the Studio Series appearance design process, the main black color gives a more mature visual enjoyment; performance is not too worried, with a quad-core i7 processor 820QM surging power , led the overall performance of efficient play, believe that any high-end business applications and video games are completely self-evident. Unfortunately, moving slightly in portable performance is not ideal, but it's HD4530 video card with relatively low ability to further weaken the whole performance advantages in the game.
Dell Studio 1535 Battery Dell Studio 15 Battery
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