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Review Asus K50IJ-SX Notebook

by Florian Wimmer 02/20/2010

Smart Entry-Level

At first glance, the Asus K50IJ is a stylish and inexpensive 15-inch office notebook intended for those who don't have high demands on performance. Find out in our extensive review to which degree this first impression holds good.

Asus K50IJ-SX Notebook
Asus K50IJ-SX Notebook

Asus has designed their K-series for everyday home use. They're sufficient for internet surfing with WLAN and word processing, but not for more complex tasks such as 3D games or video editing. That doesn't mean that Asus has completely left out multimedia qualities: Altec-Lansing speakers and a DVD drive make K-Series notebooks to portable movie players.

We have reviewed the SX145V model of the K50IJ, which has a Pentium Dual Core T4300 Processor, a 4GB RAM and an onboard Intel GMA 4500M HD graphics, and costs just over 500 euro.


Unlike some other entry-level notebooks, the K50IJ neither looks conservative nor cheap: shiny black plastic surfaces show subtle patterns with larger and smaller dots. In addition there's a shiny silver Asus logo on the upper side and the workmanship looks extremely solid.

Creaking or twisting is not noticeable when the 15-inch notebook is picked up at the edges. The lid however, allows strong pressure applied to the back to appear on the screen and it can also be twisted quite strongly. The hinges that hold the lid are stable, but still work smooth. They keep the lid in position after a short luffing and also secure it in the closed state.

The dimensions are well within the norm with 37 x 25.6 x 3.5 centimeters. Beveled edges let the notebook look even more compact. Also the weight of 2620 grams and 320 grams for the power supply turn the K50IJ into a highly mobile companion.


Asus has built connections on all four sides of the K50IJ.

The front has a cardreader, which can accommodate multimedia cards, and memory sticks. The speakers, which we'll discuss a little later, are on the left and right side.

On the left-hand side the user can connect two USB-2.0 devices to the K50IJ. A DVD drive follows behind the USB ports.

The right provides a 3.5 mm jack for headphones and microphone, and behind them two further USB 2.0 ports, a VGA-out, a LAN port and DC-in.

Two connections for Kensington security locks can be found on the rear's left and right.

Four USB ports are a fine thing per se. As two of them are on the right and two are on the left, it should be convenient for both, lefties and righties. Of course, a digital display interface would have been great too, but, considering the price, you can't complain much in terms of connectivity.

Front: Speakers, card reader
Front: Speakers, card reader
Left: 2x USB 2.0, DVD drive
Left: 2x USB 2.0, DVD drive
Rear: 2 x Kensington security slot
Rear: 2 x Kensington security slot
Right: 3.5 mm headphone and microphone ports, 2x USB 2.0, VGA, LAN, DC-in
Right: 3.5 mm headphone and microphone ports, 2x USB 2.0, VGA, LAN, DC-in

The notebook supports the new standard 802.11n as wireless interfaces. This means even faster internet connections should not be a problem for the K50 in future.

Input Devices


The Asus K50IJ has a keyboard with 88 keys and an additional numpad, whereas the keys are a bit narrower than on the main keyboard. Especially the letter keys and the most important special keys, like return and CRTL have the same size as a normal PC keyboard.

All keys have a fairly pliable stroke that you just have to like. Apart from that, you can write very well on the K50IJ. Both the wider, as well as the narrower keys are palpably well separated from one another and are concave so that you hit the intended keys. Even the narrow number keys can be used sufficiently and the key distribution, with exception of the narrow numpad zero, doesn't give reason for complaint.

The hot keys, which can be addressed in combination with the FN key, have been imprinted in light blue so that you can recognize them well and they are distinguished from the white imprint of the normal letter keys.


The touchpad has been placed far left below the space bar and can be differentiated because it's been slightly submerged, as well as having a knobby structure, in comparison to the palm rest. The surface structure makes the touchpad a little stiff, at least with the default sensitivity. The touchpad does not recognize multi-touch gestures and has no scroll bars on the right or bottom side.

Both touchpad keys, underneath the touch-sensitive area, are made made of silver plastic and have a somewhat indistinct pressure point, but with a very rich click sound. It is always detected reliably.

Overall, the touchpad works well, although or maybe just because it doesn't have any special features.



The Asus K50IJ's glossy screen measures exactly 15.6 inches. The maximum resolution of the LED-backlit display is 1366 x 768 pixels. Subjectively, the glossy coating, which Asus called 'Color Shine', makes colors look rather intense. At first sight, the contrast seems to be in order, just like the maximum brightness of the screen.

In fact, the display is quite all right for the price: The illumination varies wildly between 154.3 cd/m2 in the top center and 248 cd/m2 in the lower middle section, so a dark veil can be seen in large color areas  on the screen . The black value of 0,84 cd/m2 is quite low, so darker colors seem really dark on the screen. Also, the contrast of 236:1 is not a peak, but it is in the solid midfield.

Distribution of brightness
Maximum: 248 cd/m² (Nits) Average: 193.6 cd/m²
Brightness Distribution: 62 %
Center on Battery: 197.9 cd/m²
Contrast: 236:1 (Black: 0.84 cd/m²)

Working outdoors is difficult with the glossy coating, especially because the illumination is not high enough. Also, the vertical viewing angle is limited: if the screen is tilted backwards, color shifts are clearly visible. This effect, as in most favorable panels, is not quite as bad in the horizontal viewing angle, however, it is evident as of a certain angle.

Viewing angles
Viewing angles

Overall, the screen reaches a score of 70 percent, which can be denoted as quite good in view of the laptop's low price. However, displays of more expensive notebooks struggle with the same problems.


An Intel Pentium T4300 dual-core processor, installed in the Asus K50IJ, clocks with 2.1 GHz. Intel's Graphics Media Accelerator 4500M HD, which is favorably used as a graphic card, uses a portion of the main memory for the video memory.

The processor is quite powerful for an entry-level notebook and should be able to cope with all standard applications. The graphic chip is sufficient for basic multimedia activities and shouldn't have any problems playing HD videos from the Internet , in conjunction with the processor, either.

We tested this by using a trailer from the Internet in Full HD resolution. Picture and sound ran in sync and without stuttering even in power-saving mode. Thus, multimedia fun with the K50IJ is well on the road almost without limits. High quality flash content will also run smoothly, however, here one shouldn't enable the power-saving mode.

4096 MBytes of memory is included, but these are slightly slower DDR2 800 modules. 4 GB is also the limit, because the operating system doesn't support more memory.

System info CPUZ CPU
System info CPUZ Cache
System info CPUZ Mainboard
System info CPUZ RAM
System info CPUZ RAM SPD
System info GPUZ
System info HDTune
Asus K50IJ-SX's system information

These hardware specifications are already quite remarkable for an entry-book and so the K50IJ doesn't do so poorly in our performance test course at all: Older games should be playable in any case, confirmed by 2167 points in 3DMark03 and a solid 1169 points in 3DMark05. However, the onboard graphics is too weak for newer games.

The application performance is fueled particularly by the dual-core processor, which is made possible by 4415 points in Cinebench R10, at least, if an application uses all cores. Otherwise it is only 2040 points. PCMark Vantage also indicates that  this system is quite fast as it achieves 3141 points in the overall rating.

Cinebench R10 Rendering Single CPUs 64Bit
2040 Points
Cinebench R10 Rendering Multiple CPUs 64Bit
4415 Points
Cinebench R10 Shading 64Bit
754 Points
PCMark Vantage Result
3141 points
Windows 7 Experience Index
Calculations per second
Memory (RAM)
Memory operations per second
Desktop performance for Windows Aero
Gaming graphics
3D business and gaming graphics
Primary hard disk
Disk data transfer rate

Asus' entry-level notebook turns out to be a good choice for those who do not want to forgo on a fast processor, in any case. Because the vast majority of applications now support two computing cores, the processor should be able to manage somewhat more demanding activities in combination with the large memory, such as editing large photos.
However, applications that require a strong graphic card quickly reach their limits with the onboard GPU.

3DMark 03 Standard
2167 points
3DMark 05 Standard
1169 points
3DMark 06 1280x768 Score
803 points
Seagate Momentus 5400.6 ST9320325AS
Transfer Rate Minimum: 31.8 MB/s
Transfer Rate Maximum: 67.7 MB/s
Transfer Rate Average: 53.5 MB/s
Access Time: 18.8 ms
Burst Rate: 70.4 MB/s
DPC Latency Checker Asus K50IJ-SX
DPC Latency Checker

DPC Latencies

The DPC latencies indicate how well the system streams data to external devices such as external sound cards. The DPC Latency Checker shows that the K50IJ initially performs quite well, but in the end it swings into the red, so the system can't be considered a reliable data supplier for external sound cards, for example.


System Noise

The noise of the Asus K50IJ appears to be very low after first listening. This is confirmed by the objective test results: 32.1 dB (A) is the minimum test result; you really have to lean very close to the device to hear it at all. This noise doesn't change in idle mode even after a long time. The hard drive also fits well into the sound environment with 32.7 dB (A).

Under load, the device is somewhat louder with 38.3 dB (A) for a short time, a definitely audible noise. The DVD drive rotates just as loud, it spins with 38.1 dB (A). Our first overall impression is confirmed, anyway: The K50IJ is a relatively quiet device in terms of noise

Noise Level

32.1 / 32.1 / 32.1 dB(A)
32.7 dB(A)
38.1 / dB(A)
33.9 / 38.3 dB(A)
  red to green bar
30 dB
40 dB(A)
50 dB(A)
min: dark, med: mid, max: light    (15 cm distance)


Asus promises "Cool Comfort" for the K50IJ's surface temperature, which means a cool palm rest. The temperature is to be 25 percent under body temperature and thus, stays really cool. To achieve this, all heat-producing parts such as processor and hard drive were moved into the back of the notebook and the evolving heat is also routed to the rear.

Asus seems to keep its promise: If we assume a body temperature of 36 degrees, then the palm rest should have the temperature of about 27 degrees Celsius, according to Asus. And it does: In idle mode, we get 26.6 degrees, which is pretty close to that value. If we stress out the notebook, the left and middle part continues to be cool, but the temperature rises up to 31.4 degrees on the right side. Nevertheless, it's a hardly perceptible warming.

We measure up to 46.4 degrees in the rear center field under full load. That is already quite warm, especially since the surrounding areas protrude into this temperature range. However, the bottom is very cool in idle mode: Here we measure 32.9 degrees Celsius.

Even the compact power adapter with 47.7 degrees Celsius stays in a non-critical area, although it may serve quite well as a hand warmer.

Max. Load
 26.8 °C
80 F
40.1 °C
104 F
40.7 °C
105 F
 26.8 °C
80 F
35.6 °C
96 F
38.4 °C
101 F
 24.4 °C
76 F
26.7 °C
80 F
31.4 °C
89 F
Maximum: 40.7 °C = 105 F
Average: 32.3 °C = 90 F
46.3 °C
115 F
46.4 °C
116 F
27.2 °C
81 F
45.1 °C
113 F
44.8 °C
113 F
26.3 °C
79 F
34.8 °C
95 F
31.4 °C
89 F
26.2 °C
79 F
Maximum: 46.4 °C = 116 F
Average: 36.5 °C = 98 F
Power Supply (max.)  47.7 °C = 118 F | Room Temperature 22.5 °C = 73 F
(±) The average temperature for the upper side under maximal load is 32.3 °C / 90 F, compared to the average of 29.4 °C / 85 F for the devices in the class Office.
(±) The maximum temperature on the upper side is 40.7 °C / 105 F, compared to the average of 34 °C / 93 F, ranging from 21.2 to 62.5 °C for the class Office.
(-) The bottom heats up to a maximum of 46.4 °C / 116 F, compared to the average of 36.6 °C / 98 F
(+) In idle usage, the average temperature for the upper side is 28.1 °C / 83 F, compared to the device average of 29.4 °C / 85 F.
(+) The palmrests and touchpad are cooler than skin temperature with a maximum of 31.4 °C / 88.5 F and are therefore cool to the touch.
(-) The average temperature of the palmrest area of similar devices was 27.9 °C / 82.2 F (-3.5 °C / -6.3 F).
The speakers are from Altec Lansing and sound good
The speakers are from Altec Lansing and sound good


Despite the relatively low price, Asus did not save money on speakers. Asus installs speakers from the sound forge of Altec Lansing into its entry-level series, whose products are also used in large multimedia and gaming notebooks. Accordingly, the sound is quite good, though lacking the power of a subwoofer. However, the maximum volume is not outstanding.

The positioning underneath the K50IJ's front edge is also rather sub-optimal, since the speakers sound towards the bottom and not in the direction of the user, and secondly because they can be obscured by soft surfaces, so the sound is muffled. Overall, one can be more than satisfied with the quality of the sound in this price range.

Battery life

The battery is hidden behind a flap on the bottom.
The battery is hidden behind a flap on the bottom.

The battery comes from Asus and has a capacity of 49.6 watt-hours. It hides behind a double-secured flap on the bottom. The lithium-ion battery contains a total of 6 cells and brings the device to a maximum battery life of 5 hours and 11 minutes. However, to achieve this duration, one should not demand his laptop too much and really needs to activate all energy-saving features.

Under full load, the duration decreases drastically to just 84 minutes. Because both values are quite theoretical, we also determine the average battery life in a practical test by surfing in internet via WLAN, with some power saving mechanisms and normal brightness. The result: 237 minutes or 3 hours and 57 minutes, a very good value.

Overall, the battery life of the Asus K50IJ is so good that one can even work with the device on the road. On longer trips, however, you'll either need a second battery or occasionally look for an electrical outlet to recharge.

Battery Runtime
Idle (without WLAN, min brightness)
5h 11min
WiFi Surfing
3h 57min
Load (maximum brightness)
1h 24min

In accordance with the battery life, we assume that the minimum and maximum power consumption of the system also differs quite dramatically. And indeed, the rates fall within the range of 9.2 watts in idle mode to 42.7 watts under full load. The system uses about four and a half times as much energy when it is put under full load, although the values are within norm for this class of equipment.

In fact, if we put aside any possible anomalies in measurements, the laptop consumes almost no electricity in standby mode. The computer only draws 0.3 watts from the power outlet in standby mode.

Power Consumption
Off / Standbydarklight 0 / 0.3 Watt
Idledarkmidlight 9.2 / 13.2 / 13.8 Watt
Load midlight 28 / 42.7 Watt
 color bar
Key: min: dark, med: mid, max: light        
Currently we use the Metrahit Energy, a professional single phase power quality and energy measurement digital multimeter, for our measurements. Find out more about it here. All of our test methods can be found here.


Asus' K50IJ is a stylish entry-level notebook that has some clever details that make it worthy of a second look from performance-undemanding computer users: First, the palm rest will always be cool and allow you to work comfortably. Second, the notebook is quiet and portable enough to not attract attention, making it pleasant to carry around.

The relatively powerful dual-core processor also makes a good impression, just like the manufacturing and the features such as the four USB ports, which are distributed over both sides of the chassis. The power of K50IJ is not enough for current games, but you can certainly enjoy older classics. Also, the multimedia qualities are above average: Our tester had no problems with HD video.

The good input devices, including the numpad, the moderately decent screen in terms of value for money, the sleek design and the fair price round off the offer. This is only negatively affected by the rather high temperature under load, the lack of digital video output and unfavorably positioned speakers.

Asus K50IJ-SX
Asus K50IJ-SX
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In Review:  Asus K50IJ-SX
In Review: Asus K50IJ-SX


Asus K50IJ-SX (K50IJ Series)
Graphics adapter
Intel Graphics Media Accelerator (GMA) 4500MHD, Core: 475 MHz, shared Memory
4096 MB 
, DDR2 800MHz
15.60 inch 16:9, 1366 x 768 pixel, glossy: yes
Intel GL40
Seagate Momentus 5400.6 ST9320325AS, 320 GB 
, 5400 rpm
VIA VT1708S @ Intel 82801IB ICH9 - High Definition Audio Controller [A-3]
4 USB 2.0, 1 VGA, 2 Kensington Lock, Audio Connections: 3,5mm headphone input, microphone output, Card Reader: 3-in-1: SD, MMC, Memory Stick
Atheros AR8121/AR8113/AR8114 PCI-E Ethernet Controller (10MBit/s), Atheros AR9285 Wireless Network Adapter (b/g/n = Wi-Fi 4)
Optical drive
Matshita DVD-RAM UJ880AS
height x width x depth (in mm): 35 x 370 x 256 ( = 1.38 x 14.57 x 10.08 in)
50 Wh Lithium-Ion
Operating System
Microsoft Windows 7 Home Premium 64 Bit
Webcam: 1,3 Megapixel Webcam
Additional features
Asus Camera Screen Saver, Asus Copy Protect, CyberLink Blu-ray Disc Suite, Trend Micro Internet Security trial version, 24 Months Warranty
2.62 kg ( = 92.42 oz / 5.78 pounds), Power Supply: 320 g ( = 11.29 oz / 0.71 pounds)
600 Euro



Asus and its K50IJ...
Asus and its K50IJ...
...and touchpad are quite reasonable for the price.
...and touchpad are quite reasonable for the price.
However, the screen provides only average test scores and is strongly reflective.
However, the screen provides only average test scores and is strongly reflective.
Nice details compensate this, like the cool palm rests,...
Nice details compensate this, like the cool palm rests,...
...the large keypad...
...the large keypad...
...with integrated numpad,...
...with integrated numpad,...
...the yellow-lit power switch...
...the yellow-lit power switch...
...and the status LEDs...
...and the status LEDs...
...and the rounded corners that make the notebook seem even more compact.
...and the rounded corners that make the notebook seem even more compact.
Together with DVD drive, the K50IJ is almost a multimedia machine.
Together with DVD drive, the K50IJ is almost a multimedia machine.
...which deliver a solid sound.
...which deliver a solid sound.
...wants to especially catch customers of the entry-level sector.
...wants to especially catch customers of the entry-level sector.
The Taiwanese engineers gave the notebook a stylish design...
The Taiwanese engineers gave the notebook a stylish design...
...with shiny surfaces...
...with shiny surfaces...
...and a compact form.
...and a compact form.
The manufacturing leaves little to be desired...
The manufacturing leaves little to be desired...
...even the hinges are firm and stable.
...even the hinges are firm and stable.
Highlights of the configuration and...
Highlights of the configuration and...
...the dual-core processor from the Pentium family...
...the dual-core processor from the Pentium family...
...and speakers from Altec Lansing,...
...and speakers from Altec Lansing,...
Asus takes security very seriously, and places two ports for a Kensington lock on the rear.
Asus takes security very seriously, and places two ports for a Kensington lock on the rear.

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Compare prices


+Relatively strong dual-core processor
+Beautiful and quality design
+Good value for money ratio


-Unfavorably positioned speakers
-Highly reflective screen
-No digital video output


What we liked

Asus offers a good overall package at a reasonable price.

What we missed

A digital video output.

What surprised us

How good an inexpensive notebook can look.

The competitors

Sony Vaio BZ is also nice and even has a metal casing and is more powerful, but also a bit more expensive. Also for a little more money, there's the Asus P50IJ, the business twin of K50IJ with matt screen. However the Samsung E251 Esilo is cheaper with 399 euro, but it also comes with a duller design.


Asus K50IJ-SX - 02/11/2010
Florian Wimmer

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> Notebook / Laptop Reviews and News > Reviews > Archive of our own reviews > Review Asus K50IJ-SX Notebook
Florian Wimmer, 2010-03- 9 (Update: 2013-06- 6)