Asus VivoBook E403SA-US21 Review

ASUS VivoBook E403SA-US21

The ASUS VivoBook E403SA-US21 is like a netbook ON STEROIDS. Unlike the much wimpier Asus VivoBook E200HA-US01-GD I reviewed earlier, this one actually has some balls to it. It’s an ultra-compact laptop with a good dose of RAM and processing power along with a beefy battery to keep you running smooth all day long. Top that off with a Full HD 1920×1080 display and a USB 3.1 Type-C port and you’ve got a very good sub-$500 contender.

Save up to 37% when you buy online

14″ FHD 1920×1080 Display

I really like their choice of a 14-inch screen to go with this beefed up netbook. 11.6″ is really too small to get any real work done, let alone watch a video. 15.6″ screens are absolute monsters and make even the thinnest laptops into behemoths. A 14-inch screen is really my goldilocks zone for being just right. The screen isn’t too small, the laptop isn’t too big, and hey, everything is in full HD so who’s complaining?

Windows 10

Love it or hate it, this laptop has Windows 10 pre-installed. At least it’s not Windows 8 and at least this laptop has enough RAM and processing power to run a Microsoft OS.

Intel Braswell Quad Core Pentium N3700 Processor

I guess that the only way to describe the new line of “Pentium” processors from Intel is that they sit somewhere between their Celeron processors and their Core series processors. They’re a kind of middle ground that provides more processing capability with a somewhat more limited amount of CPU cache. Basically, this processor is decent for the money. It’s quad-core running at 1.6 GHz and bursts to 2.4 GHz in turbo mode. More than enough power for a system like this.

Super Thin and Lightweight

This laptop is less than an inch thick (0.7″ to be exact) and weighs just over 3 pounds. This system is definitely mobile-friendly. It would be perfect for a student or any mobile professional who needs to take their office with them. The 57 Whr (Watt hour) battery has enough juice to keep this puppy purring all day long (assuming that puppies purr, I’m not an expert).

128GB eMMC Flash

This VivoBook might cost twice as much as the VivoBook E200HA-US01-GD, but it’s got four times the internal storage. The storage also happens to be eMMC flash meaning that your operating system and applications will run much more quickly than they would if they were loaded off a standard mechanical hard drive. I think that 128 GB of internal storage is an excellent compromise when dropping all of the problems that mechanical hard drives can bring including performance bottlenecks and outright crashes.


I was really, really glad to see that Asus decided to load this model up with 4 GB of RAM. Anything less would have made this such a wasted effort. The specs overall are very good for the price and adding 4 GB of RAM to this system, as opposed to 2 GB, makes it that much more appealing to me. I think that in 2016 4 GB of RAM is the BARE MINIMUM you should even consider having in a Windows laptop.

All Kinds of Crazy Connections

This laptop has the very best WiFi standard currently available, 802. 11 AC. It also has the latest Bluetooth 4.0, a single USB 2.0 port , one USB 3.0, and one USB3.1 Type C port and an HDMI port. The USB 3.1 Type C port is really cool because if you pair it with a monitor that also has USB Type-C (such as the LG 27UD88-W) you can actually charge your laptop through your monitor while also sending video to the monitor.

Save up to 37% when you buy online

Features and Specifications

  • 14-Inch Full HD 1080P Display, Windows 10 Signature Edition Pre-Installed
  • Intel Braswell Quad Core N3700 1.6 GHz, Turbo to 2.4 GHz
  • Ultra-thin and light design: 0.7″ thin and 3.3 lbs. light. All-day battery rated 57 Whrs
  • 128GB eMMC Flash and 4GB RAM for fast boot time and application performance
  • Wi-Fi 802. 11 AC. Bluetooth 4.0. 1x USB 2.0, 1x USB 3.0, 1x USB3.1 Type C, 1 x HDMI. One year Domestic Warranty.

Brand Name Asus
Item model number E403SA-US21
Operating System Windows 10
Item Weight 3.3 pounds
Product Dimensions 9.3 x 13.3 x 0.7 inches
Flash Memory Size 128.0 GB
Screen Size 14 inches
Max Screen Resolution 1920×1080 pixels
Processor 2.4 GHz Intel Pentium N3700
Hard Drive 128 GB
Wireless Type 802.11 A/C
Number of USB 3.0 Ports 1

Customer Reviews

The Asus VivoBook E403SA-US21 is a relative newcomer to the laptop market but has already picked up a handful of reviews on popular sites such as Amazon. On Amazon, it has 8 ratings with an overall average rating of 4.3 out of 5-stars. 7 out of 8 reviewers gave this laptop a 4 or 5-star rating but one reviewer gave it a 1-star rating, the lowest rating possible.

Do yourself a favor and follow the link below to read the real customer reviews that have been left for this laptop. Then you can decide for yourself whether or not it’s a decent laptop or if I’m just full of it.

See what REAL customers have to say

Additional Resources

ASUS Vivobook E403SA-US21 on
Consumer Reports Rating of the ASUS Vivobook E403SA-US21
Manufacturer’s Homepage

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