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  • ASUS U31SD-AH31 13.3-Inch Ultra-Portable Laptop (Black)
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ASUS U31SD-AH31 13.3-Inch Ultra-Portable Laptop (Black)

by Asus
25 customer reviews

Currently unavailable.
We don't know when or if this item will be back in stock.
  • Intel Core i3-2330M Processor 2.2GHz
  • 500GB 5400RPM Hard Drive
  • 13.3-Inch Screen, NVIDIA GeForce GT 520
  • Windows 7 Home Premium 64-bit, 8 hours Battery Life
See more product details

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Product Description

Stunningly Light . Powerfully Beautiful

The ultra-stylish compact 13.3-inch U31SD-AH31 notebook delivers impressive multitasking performance and long-lasting battery life for up to 8 hours1 of unplugged freedom. From Web browsing to more intensive tasks like gaming, the U31SD-AH31, powered by the second generation Intel® Core i3-2330M processor and DirectX® 11-compatible NVIDIA® GeForce® GT 520M graphics with 1GB video memory and 4GB of system RAM, and you get a notebook that fields serious power for every application.

Featuring NVIDIA Optimus Technology, the U31SD-AH31 works like a hybrid car delivering performance and battery conservation depending on your task at hand. Under an inch thick and very light but totally durable for everything you want to use it in. That's the wonder of the design that has gone into the U31SD-AH31, a notebook that doesn't sacrifice performance in the name of style and mobility – it gives you all the best of every world.

Stunningly Light . Powerfully Beautiful

Key Features

  • ASUS Super Hybrid Engine for optimal system performance and up to 8 hours of battery life1 (Learn more)
  • 2nd Generation Intel Core i3-2330M processor with Intel Hyper-Threading Technology delivers responsive and efficient multitasking performance (Learn more)
  • NVIDIA GeForce GT 520M graphics card with 1GB DDR3 VRAM and NVIDIA Optimus Technology for smooth HD playback and Direct X 11 causal gaming with smart, battery-saving efficiency (Learn more)
  • Lightweight and less than 1-inch at its thinnest point for effortless grab-and-go portability (Learn more)
  • 500GB hard drive and 4GB of DDR3 system memory for ample storage space and enhanced multitasking
  • HDMI connectivity to easily connect to a compatible HDTV or external display for Full 1080p HD visuals and 8-channel digital surround sound support (Learn more)

  • Learn More

    Balancing Performance and Mobility

    Balancing Performance and Mobility
    View Large
    The newly-redesigned U31SD-AH31 offers the sheer power of the second generation Intel® Core i3-2330M processor in a sleek and light form factor that's fun and easy to carry with stylish portability. You can get more done over a full day of computing with exclusive ASUS Super Hybrid Engine energy optimization.

    With up to 8 hours of unplugged freedom,1 the built-in ASUS Super Hybrid Engine uses both hardware and software to optimize system performance, control fan noise, and ensure long-lasting, charger-free mobility through selectable power profiles. Whether it is maximizing battery life or performance, each profile is enhanced for virtually any user scenario you can imagine—putting you in full control of the notebook. NVIDIA Optimus Technology furthers battery savings by detecting system load and automatically switching between discrete and embedded graphics. It seamlessly gives you power when you need it and energy efficiency for less demanding tasks.

    Visually Powerful, Aesthetically Pleasing

    Visually Powerful, Aesthetically Pleasing
    View Large
    Featuring the NVIDIA GeForce GT 520M graphics card with 1GB DDR3 VRAM, experience eye-catching visual performance while editing photos, watching movies, or playing Direct X 11-enabled casual games. The 13.3-inch LED-backlit HD display delivers vibrant clarity with a native resolution of 1366x768 and a 16:9 viewing ratio.

    The U31SD-AH31 award-winning chiclet keyboard allows for a comfortable typing experience and the multi-touch trackpads provides effortless 3-touch navigation. Lightweight and less than 1-inch at its thinnest point, the U31SD-AH31 comfortably fits into carrying cases, making it an ideal choice for a business and school.

    Complete Connectivity

    Complete Connectivity
    View larger
    The U31SD-AH31 comes with high-speed wireless N connectivity (@2.4GHz) to let you connect to the thousands of nationwide hotspots. Easily transfer data and connect peripherals with its built-in 3-in-1 card reader (SD, MMD, MS) and three USB 2.0 ports. HDMI ready, supersize your entertainment to any compatible HDTV or external display with Full 1080p HD playback and 8-channel surround sound support.

    Relax, ASUS Has You Covered

    Ranked as the #1 most reliable PC brand by 3 independent sources,2 readers and editors alike choose ASUS as their trusted notebook and netbook. ASUS tirelessly strives to exceed expectations of quality to ensure you an unmatched peace of mind every time you start your PC.

    This notebook also comes with the industry's most comprehensive warranty.

    1 Year ASUS Global Warranty2

    Offers a level of coverage that would add hundreds of dollars to the price of competing laptops:

  • 1 year global warranty
  • 30 day Flawless Display Guarantee
  • 2-way free standard shipping
  • 24/7 tech support

  • 1 Year Accidental Damage Protection (ADP)2

    Accidents happen. But when they happen to your ASUS notebook purchased in the US or Canada, you have extra protection. Whether your notebook is damaged by accidental spills, drops, electrical surges, or fire, ASUS will fix it or replace it during the first year after purchase.3

  • Target 3 business day turnaround time for repair / replacement; not including receiving and shipping time
  • 1-way shipping (from ASUS to the user) at no additional cost
  • 24-hour toll-free phone support

  • What's in the Box

  • U31SD-AH31 Notebook
  • AC Adapter
  • 8-cell Battery Pack
  • Warranty Information Card


  • Operating System: Windows 7 Home Premium (64-bit)
  • Display: 13.3-inch LED-backlit HD display (1366 x 768)
  • Processor: 2nd generation Intel Core i3-2330M processor (2.2GHz)
  • Graphics: NVIDIA GeForce GT 520M 1GB GDDR3 VRAM
  • WLAN: 802.11 b/g/n (@ 2.4GHz)
  • Bluetooth: B.T 3.0
  • LAN: 10/100/1000 Mbps Ethernet
  • Memory: 4GB DDR3 SDRAM, 2 x SODIMM Sockets (up to 8GB)
  • Storage: 500GB 5400RPM hard drive
  • Camera: 0.3 megapixel
  • Speakers: Stereo speakers
  • Microphone: Digital Array Microphone
  • Card Reader: 3-in-1 card reader (MMC/SD/MS)
  • Input / Output: 1 x Mic-in, 1 x Headphone-out, 1 x VGA port/Mini D-Sub 15-pin for external monitor, 1 x RJ45 LAN, 3 x USB 2.0 ports, 1 x HDMI
  • Battery: 8 cell
  • Dimensions: 12.9 x 9.2 x1–inches (W x D x H)
  • Weight: 4lbs (with 8 cell battery)
  • Color: Black

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home premium

Windows 7 Home Premium

The Best Entertainment Experience On Your PC

Windows 7 Home Premium makes it easy to create a home network and share all of your favorite photos, videos, and music. You can even watch, pause, and rewind TV or record it to watch whenever and wherever you want. For the best entertainment experience, choose a PC with Windows 7.

Windows 7: Your PC Simplified

  • Improved desktop navigation features like Snap, Peek and Shake, make it easier to manage all of your open windows.
  • Find virtually anything on your PC--from documents to songs to email--just by typing a word or two with Windows Search.
  • Designed to make your PC sleep and resume quicker.
  • Watch, pause, rewind and record TV with Windows Media Center to watch whenever and where ever you want.*

Get a Faster, Safer Web with a New PC and Internet Explorer 9

  • Helps protect against identity theft and malicious software with SmartScreen Filter.
  • Movies, TV, and videos look better and run more smoothly.

Create, Connect, and Share with Windows Live

Windows 7 and Windows Live bring it all together for free. Get the free set of programs that make it simple to create and share amazing photos and movies, organize mail, and stay connected with your closest friends.

  • Get free online storage with Windows Live SkyDrive.
  • Sync files on your PCs automatically with Windows Live Mesh.
  • Share photos during video chats with Windows Live Messenger.**
  • Easily edit photos. Combine the best parts of multiple photos into one perfect photo with Photo Fuse.

You can download Windows Live for FREE at

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office    office

Complete Your PC Experience with Microsoft Office 2010

  • Includes reduced functionality versions of Microsoft Word and Excel with advertising. (Note that PowerPoint or Outlook are not included.)
  • Purchase Office 2010 today and get the most out of your new PC.


* Additional hardware may be required. Not available in all countries. (See for more information.)
** Requires a compatible microphone, speakers or headset, webcam, and broadband connection.

    © 2011 ASUS Computer International. All Rights Reserved. ASUS is a registered trademark of ASUSTeK Computer. All specifications and terms are subject to change without notice. Please check with your supplier for exact offers on selected models. Products may not be available in all markets. Product may not be exactly as shown in photos.

    1 Actual battery life may vary based on product settings, usage patterns and environmental conditions.
    2 Rated number 1 Windows-based PC maker in's Service & Reliability Report 2010. Rated number 1 PC brand according to SquareTrade, the leading direct-to-consumer warranty company (for more information visit ). Rated number 1 reliable PC maker in Q2 2010's RESCUECOM report
    3ASUS reserves the right to exclude certain SKUs; check with your retailer to confirm coverage of specific models. Valid for notebooks purchased in the US and Canada only. Certain retailers do not participate in ADP coverage. For complete details, please visit: and

    Check Out Other Great ASUS Products

    ASUS U30SD-XA1 Thin and Light Laptop

    ASUS Eee Pad Transformer Tablet (16GB)

    ASUS ML248H 24-Inch LED Monitor

    ASUS RT-N56U Wireless N Router (dual-band)

From the Manufacturer

13.3" (1366x768) LED/ i3-2330M Dual Core (2.2GHz)/ 4GB DDR3 RAM/ Nvidia GT520 1GB/ 500GB 5400/ Windows 7 Home Premium (64bit)/ 802.11BGN/ 0.3 Pixel/ Bluetooth 3.0/ 3 USB 2.0 Ports/ HDMI Port/ 8 Cell Battery/ 3-in-1 Card Reader/ 1 YR Global Warranty/ 1YR Accidental Damage Protection/ 30 Day Zero Bright Dot/ 2-Way Free Shipping/ 24-7 Tech Support

Product Information

Expand all Collapse all Technical Details
Screen Size13.3 inches
Screen Resolution1366 x 768
Max Screen Resolution1366x768 pixels
Processor2.2 GHz Intel Core i3
Memory Speed 1333 MHz
Hard Drive500 GB SATA
Graphics CoprocessorNVIDIA GeForce GT 520
Chipset BrandNVIDIA
Card DescriptionGeForce GT 520M
Graphics Card Ram Size1000 MB
Wireless Type802.11bgn
Number of USB 2.0 Ports 3
Average Battery Life (in hours) 8 hours
Brand NameAsus
SeriesU31 series
Item model numberU31SD-AH31
Hardware PlatformPC
Operating SystemWindows 7;
Item Weight4 pounds
Item Dimensions L x W x H12.90 x 9.20 x 1 inches
Color Black
Processor BrandIntel
Computer Memory TypeDDR3 SDRAM
Hard Drive Rotational Speed5400 RPM
Audio-out Ports (#)1
Battery Typelithium_ion
Power SourceDC
Voltage19 volts
Additional Information
Best Sellers Rank #25,457 in Computers & Accessories (See top 100)
Shipping Weight7.4 pounds
Domestic Shipping Item can be shipped within U.S.
International Shipping This item is not eligible for international shipping. Learn More
Date First AvailableOctober 1, 2011
Warranty & Support Return Policy: You may return any new computer purchased from that is "dead on arrival," arrives in damaged condition, or is still in unopened boxes, for a full refund within 30 days of purchase. reserves the right to test "dead on arrival" returns and impose a customer fee equal to 15 percent of the product sales price if the customer misrepresents the condition of the product. Any returned computer that is damaged through customer misuse, is missing parts, or is in unsellableRead more condition due to customer tampering will result in the customer being charged a higher restocking fee based on the condition of the product. will not accept returns of any desktop or notebook computer more than 30 days after you receive the shipment. New, used, and refurbished products purchased from Marketplace vendors are subject to the returns policy of the individual vendor.

Product Warranty: For warranty information about this product, please click here

Customer Questions & Answers

Customer Reviews

Most Helpful Customer Reviews

20 of 22 people found the following review helpful By Peacefrog on January 6, 2012
Verified Purchase
The Asus U31SD-AH31 is probably more overlooked by prospective buyers than other brands with similar offerings. If you are looking for a 13.3" that is fast, reliable, and offers a nice design and durability, look no more.

I have owned the Asus for about a week. Setup was easy (not much 'fluff-ware'), boosting the RAM to 8GB was as easy as could be, sound is more than adequate, and overall performance and speed are all I had anticipated. Watchng HD on its bright and clear LCD is really a pleasure. Battery life is better than most at about seven hours. Keyboard and trackpad are both very responsive and feel very nice to the touch.

One can easily spend much more, but this Asus offers a great bang-for-the-buck. Well worth considering.
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26 of 35 people found the following review helpful By mdegges on January 13, 2012
Verified Purchase
I mainly bought this laptop because of the NVIDIA graphics card and the battery life. I wanted a sturdy, mobile, laptop that I could take to my classes and to work, that I could also use to play modern games on at home. My first choice was an Acer TimelineX laptop that has about the same stats and costs the same price, with a 9 hour battery life and more hard drive space. Unfortunately, that model had been sold out everywhere and I was told it would probably be discontinued. So I decided to buy this laptop instead.

Pros: Graphics card is really decent and works with most modern games (I've tried COD, Wolfenstein ET, MW2, Maple Story), realistic 6.5 hour battery life (on battery save mode), beautiful chiclet keyboard with blue accents, sturdy trackpad, overall sleek look when cleaned regularly, weighs just over 4 pounds, easy access to hardware for upgrades

Cons: Overall, the monitor in general is not good quality. I'm not familiar with asus laptops (so I'm not sure if all of their laptops have this feature) but the monitor feels cheap and wasn't connected to the computer with sturdy hinges. I don't think it will last long. The outside of the monitor shows tons of fingerprints, and the glare is insane unless you have it open at just the right angle. Also, the color scheme significantly changes depending on the angle of the screen. (I have a little lenovo x120e netbook and it's screen size is thicker than this Asus one, making it much more protected for my mobile needs.)

Other thoughts: The left and right clicker buttons are already scratched up from just a few hours of use. It's a little disappointing to find this in a $600+ computer.. They could have used a much better material.
Read more ›
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2 of 2 people found the following review helpful By Bubu on April 11, 2012
Verified Purchase
This computer has tons of storage and a powerfull processor, it makes my work faster.
When I received this computer, it was in its box, aditional package inlcuded for protection, good job!
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2 of 2 people found the following review helpful By A. Murray on February 23, 2012
Verified Purchase
I just bought this laptop to upgrade from a netbook I had bought last year. I am very happy with my purchase and would suggest it to anyone. My only complaint is that the keys tend to stick sometimes when you are typing, but I think that is because it is new and needs to be broken in. I do suggest that you buy Windows Office Suite since I could not find a word processor preinstalled on the machine. I am used to new computers coming with Works, but thus far I cannot find it.
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4 of 5 people found the following review helpful By Brewski on February 14, 2012
Verified Purchase
First Review:

In my search for a new laptop, I was looking for one that was in the 13in range, and had a dedicated graphics chip. For the most part, I trust Asus as a brand. Price was a consideration as well, and this one fit my budget. Personally, looks don't matter too much to me. If you want a beautiful laptop over anything else (this one isn't bad looking), then you should go to your nearest Apple store. That said, the back of display although metal, is prone to finger prints, much like any of the glossy surfaces on the device. As for sound, it is usually silent, unless you are playing a game or video. The fan seems a little loud for a current-era laptop, however when you think about what they are putting into the machine, you can start to understand why it does turn on. Fortunately, with the fan, the laptop doesn't get hot.
I love the keyboard, it is comfortable and easy to type on. I do have to get used to the position of the right hand shift key, along with arrows and paging keys. Coming from a standard keyboard, it will take a little while to get used to. The trackpad works well, along with the two finger scrolling. The texture of the trackpad is like running your fingers on finely scored metal. Some may not like that kind of feel.

Upon turning it on, I found that it has a fair amount of bloat-ware installed. However, every time I buy a computer, the first thing I do is download its drivers, and reformat. I urge the same for any computer you buy. Web browsing works well, and the angle you can see the screen works well for me. Gaming (I've tried Minecraft so far) works great for a laptop. I was pleasantly surprised at how fluid it ran, even in full screen. Google Earth worked well too. I will install more games to find out how well they run.
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6 of 8 people found the following review helpful By Nice Man on December 31, 2011
Verified Purchase
This is a perfect machine for mobility and power. Great sound, battery life is over 7 hours and light weight.
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