Appearance and design
Latitude E6400 is the impression most people, it will not only make people feel strong, and it is very strong indeed. Latitude E6400 all basically the same as the thickness of the location, not the more popular kind of wedge-shaped design. The outermost layer of paint that is not bleak, not reflective, but something in between. Screen using the drawing metal roof paint, looks very stylish.

If the hinge is also a quality of intensity targets, then the E6400 is probably the hinge to the top of the list. Open the top cover must rely on his hands. Cap is the alloy. I tried to squeeze and twist the screen, but no ripples on the screen. E6400 is a bottom screws only a single metal plate, very easy to demolition. E6400 is like the metal chassis. dell x284g Battery can easily be loaded to E6400, the battery power there is a simple table. At the bottom of the E6400 is very smooth, even if equipped with a rubber foot, it is easy to slide from the surface. Batteries is also very smooth surface. Therefore, E6400 is not easy to carry with one hand.

Hard disk hard disk cartridge is not loaded, the only two screws in the notebook. There is a small hard drive light, the entire hard drive is hidden and loaded on the notebook chassis, around the stent seems that there is no shock absorption. Dell may feel that, since the user to choose the solid-state hard drive or hard drive without sensors, shock absorber bracket assembly is not necessary things.

From the Device Manager can see the entire display is LPL0140 display brightness will be very bright, and I feel the original is that this display worthy of you to spend some money. In addition to pushing away the screen that moment there will be changes in color, the color contrast of the screen are very crisp and perspectives. I could feel the idea of aircraft on the screen of any tiny change, but the actual use is very difficult for you to take note of these. So far, I have not found any Dead screen.

The overall good feeling keyboard.

The Latitude E6400 is a touch pad 66mm x 39mm medium-sized OEM Alps touchpad. Due to the top of the touch pad mouse button 3 to occupy a certain position, E6400 can not be equipped with a touch more. But the touch pad and mouse button 3 which is very convenient (asus A32-U80 laptop batteries), key-way is very long, but not the intensity. I seldom use trackpoint, but the E6400 seems to good use trackpoint. We can also switch software through a touch pad and trackpoint feature.

Latitude E6400 is the backlit keyboard is one of the matching. When the light around the dark, this keyboard is absolutely easy to use. Moreover, the characters on the keyboard light is embedded in a white plastic cap production and, therefore, these characters will never be worn away from the cap on. However, the light above the keyboard is not good enough. In it, if you face the Latitude E6400, sit back( asus eee pc laptop battery), you can see the light under the keyboard, this will affect the visual. You can use the sensitive keyboard backlight automatic device, or manually using Fn key to control. Status Indicator in the top of the keyboard, palm rest than to use the lights more convenient. The computer shut down as a result of circumstances, the state of light is not visible, therefore, Dell installed the E6400, two external lights. When the computer is turned on, power supply, such as a blue; when your computer hibernation, the power will stop blinking and so on. In a state-of-charge, the dell Alienware M17X laptop battery light will be lit.

Latitude E6400 has a number of interfaces, including: USB interface (which a Power Share function, can be closed in case of computer peripheral equipment to the power supply; have an external USB / eSATA combo), mini Firewire, gigbit Ethernet, VGA, Display Port and an optional modem interface. I have noticed that some of the desktop interface from a close distance. 4 out two pairs of USB into shape, so large peripheral joints may be blocking the other two USB. E6400 also has a support SDHC in SD / MMC card slot, users can also video-on-demand or Express Card slot PC Card slot.

SATA interface drive is a 9.5mm (3 / 8 ") ultra-thin optical drive. I chose the DVD burner drive, specifications for the SATA PLDS (Philips Liteon) DU-8A2S, with a full set of tools to burn the DVD, the only defect is not LightScribe. CD-ROM is easy to demolish (dell F310J laptop batteries). perhaps drive and optical disk drive for thin positions, so there is no optional battery a bit of drive. SATA drive place an interface has a USB jack, so, to the This increase in second hard drive, but also need to install an additional adapter.

Keyboard on each side of a fence, the fence is below loudspeakers. However, the closer, you will find that only a large decorative fence, because the following is only a very small (12mm or 0.5 ") speakers. Although, the biggest effect at the time of���volume, but the lack of bass, and a bit too much treble. the voice of the driver for the IDT Audio, and Realtek do not bring their own voices balanced adjustable Manager. Thus, while the volume of loudspeakers can be, but it can not adjust the treble and bass. Therefore, the only audio connection look,

I customized a web camera and microphone, and use Skype the quality of these two components were tested. Cameras (only in 640 x 480 resolution) can also be used to chat, do other users, on the point of death. Webcam Central software can be used to adjust the camera effects, such as: to enlarge the image. Microphone to me feel good. Typically, laptop notebook microphone will also pick up the noise itself, but the E6400 is located at the top of the screen of the microphone, making noise levels are very small.

Testing is installed 2 x 1GB DDR2-800 RAM Dual Channel All XP SP3 on the basis of. Such a configuration would somewhat affect the test results. Previously, testing my Toshiba R500, it was found in Vista than on wPrime to run faster on XP.

Latitude E6400 at 2.4GHz the P8600 Core 2 Duo processor is also in the cargo terminal. Zepto's 2GHz T7300 enough for me, but no one faster too, especially the speed, and power consumption is reduced. It is said, Intel GM45 chipset than its predecessor and better product performance, and have a longer battery life.

E6400 when someone talked about the performance of high-definition video playback, I downloaded from Microsoft and play the Terminator 2 trailers. The ability of the Latitude E6400 can be really fine players, fans began to low-speed rotation. And in my Zepto play this video, but the phenomenon seems to have lost Fok. Which can be identified, Intel has been in the GM45 chipset integrates high-definition decoder. I use RMClock to monitor the situation CPU. The biggest difference is: P8600 can SLFM frequency (800MHz) to deal with a number of playback, 1080p player will reach 1.6GHz; T7300/965GM you need to run the CPU at full speed (P8600 temperature T7300 lower than 5 degrees Celsius).

Dell on the E series of information There is a paragraph about the new thin-and-light 90W of power. However, the Latitude E6400 has given me a D series with the "big brick" power supply, looks better than I on the power of the block header Zepto larger. I also ordered the optional slim 65W auto / air / AC power adapter, because the power supply for the integrated graphics for notebooks have been enough. I can power on a home, another office supply place. Thin-and-light compact 65W power really, but when it is connected to the computer when, BIOS will detect it and automatically the computer performance. What this indicates to me a very bad mood.

Through the main power table can be seen, when the Latitude E6400 running 3DMark06 benchmark this program, the outlet is less than the maximum power of 40W (the role of the computer may also 35W). Low load operation, the power in the 14 to 18W. Only when the battery charging, power will be more than 40W. The standard battery power 35W (When the good battery, the power will be reduced again), so running at full capacity or full charge, the power consumption should be around 70W. Most notebook computers, as computer power consumption of more than ability, the speed will be reduced charge. Of course, you can start in the BIOS options express charge. Dell said, express charge in 1 hour with 80% of battery capacity.

Heat and fan noise
In my view, E6400 in the heat and noise control have been improved. When the computer is running very quiet, I initially thought that the fan did not work. In fact, when the computer is running at low load, heatsink (heat pipe) and the site to absorb a lot of heat, so fans do not need to work almost. E6400 fan speeds are generally three kinds of modes: slow, fast, stop switch. Operate at the lowest fan speed, almost no sound; fan only when high-speed operation in order to hear the sound, but that would require high-speed CPU to run the first few minutes. I think that I chose to benefit from a low-power CPU and integrated graphics, while the cooling system is configured for higher power and practical. On my observation, in high-load test, the fan to achieve high-speed operation of the CPU before the maximum temperature of 75 �° C.

Through the week to observe the status of the fan, I still do not understand the fans engage in is how to nVidia GPU out of the heat dispersion, which can be heat than to the integrated graphics of the more difficult. In most notebooks, the CPU fan on a very rapid response activities. In E6400, the once high-speed rotating fan to start, even if the CPU activity stopped, fans will still maintain a few minutes of high-speed rotation. The same situation also appears in the fan at a time when low-speed movement. We can use these MobileMeter test results (level of online scale on behalf of each 5 seconds). The curve shows an increase from the fan did not rotate and the temperature gradually rose to the fan started to rotate. After the temperature dropped very quickly, but the fans will continue to rotate for 10 minutes or more (because of the cooling system of high temperature than the ambient temperature). Finally, turn the fan stops, the temperature began to rise again. I hope Dell considerations for GPU refresh BIOS. Hard disk is still good, normally does not exceed 40 �° C.

Dell great emphasis on E6400 19 hour battery life (need to configure the main 9-cell battery and 12-cell battery board). Accordingly infer ,6-cell battery should be able to cope with six hours of life. Of course, you also must use a battery in good condition and maintain the power consumption 9W. I have come to the conclusion of six hours or feasible, but will take a very economical use of computer, such as: backlight dimmed, turn off the wireless network card, maintaining a low CPU load, no less than the hardware must be shut down. However, by 6-cell battery to achieve the five hours of life or it is not difficult. Even sitting in the sun, on a wireless network, you use electricity enough for four hours. With the increase in the number of charging, the battery will reduce the power consumption, power supply will also reduce the time. My battery is fully charged, in the past week decreased by 1.5% in electricity consumption. E6400 assembly if the T series CPUs, nVidia GPU and a faster hard drive, battery life will be even shorter.

Dell Control Point software with power management features in battery-powered to reduce power consumption, such as: the closure of less than the equipment used. To power, but also can be changed to display 16-bit color, and reduce the refresh rate. Although the software can make when battery-powered computer to enter power-saving mode quickly, but I do not think that, when using external power, this computer software for optimal performance. At the very least, I do not have to do-it-yourself, the best to modify the display settings.

(i) as a result of Dell's best power-saving mode will affect the playback, I do not have to choose the best battery mode; (ii) in the DVD player, I also write this review article; (iii) the use of KY477 batteries in the first , the power to reduce very quickly. However, I still believe that by adjusting the cell model, E6400 can easily put this 3-hour film to deal with. I also noted that Dell bundled version of PowerDVD to playback for DVD. Version of PowerDVD and other DVD in the player will stop running, but also the memory as a cache, so that more power. If you want to know how much power the backlight, I have to do a battery-powered in case of total power consumption graph. The chart below shows, the largest and the smallest brightness brightness difference between the power 4W. Fortunately, the middle has enough brightness.

Summary
When you see the LED backlight WXGA + display on a crisp clear image, happy enough to offset the weight of this computer brought about by depressed. Dell stressed that all the information how light this computer, but the actual situation is not the case. Fortunately, the feeling of use is still very happy about it.

Very good quality casing, if Dell can give it a good point with the speakers, all the better. Too smooth shell makes this computer very easy to slide from the desktop or the hands. Maybe this is why so keen on Dell to provide drop-proof storage options (anti-falling memory matching) reasons.

Advantages
Excellent display (LED backlight WXGA + matching)
Drawing of the top patterns
Good performance
Only 6-cell battery life will be 6 hours at low load
In addition to the high negative rotation of high-speed fan operation and when to maintain the feeling of cool and quiet
Most parts easy disassembly
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