Zenbook

Zenbook

A first generation UX21
Developer Asus
Type Ultrabook
Operating system Windows
Website zenbook.asus.com

Zenbook (also known as ZenBook) are a family of ultrabooks – low-bulk laptop computers – produced by Asus. The first Zenbooks were released in October 2011, and the original range of products was amended and expanded during 2012. Models range from 12-inch laptops, featuring power efficient components but lacking connectivity and having only integrated graphics processors, to 15-inch laptops with discrete graphics processing units and optical disc drives. Most (though not all) Zenbooks use Intel Core ultra-low-voltage processors and Nvidia GPUs when integrated graphics are not used. Asus introduced new models with touch screens to take advantage of Windows 8 after its release in late 2012. Most models drew comparisons to the Macbook Air. The most recent release in the Zenbook line is the upmarket Zenbook Infinity UX301 series.[1] The Zenbook mainly competes against computers such as Acer's Aspire, Dell's Inspiron and XPS, HP's Pavilion and Envy, Lenovo's IdeaPad and Toshiba's Satellite.

Asus designed the Zenbooks with brushed aluminium chassis and high rigidity, rather than plastic, the usual laptop construction material. A pattern of concentric circles on the lids is said to represent ripples in water and represent the "zen philosophy" that designers wanted to portray when creating the laptops. Zenbooks have been generally well received due to their chassis design and appearance as well as the high quality screens used in later models. However, the touchpad software was found to be erratic, particularly on the early models and some of the models received criticism for their high prices. Some models (such as the UX32) suffer from lockdown when the lithium polymer battery cell gets drained or discharged below its recommended threshold, for example if the device is left on and unattended. The result is that the charger will fail to recharge the battery even when plugged in, leaving the machine in a near-complete unresponsive off-state. The machine can often be revived by pressing the power-on key for 10 seconds, whereupon it will start recharging.[2]

Design

The concentric circles on the lid of a Zenbook are said to represent ripples in water.

In 2009 Asus released the UX50V, a 15 inch laptop that was focused on energy efficiency and had a thin profile.[3] The laptop was rated poorly by reviewers as it under-performed and had mediocre battery life, despite the installed energy efficient hardware.[4] Although not branded as one, it bore the same "UX" product code as many of the later Zenbooks and was an early foray into the ultraportable market.

The Zenbook name was proposed by Asus chairman Jonney Shih to reflect the "zen philosophy" applied to the design.[5] The chief designer, Loewy Chen, had wanted to incorporate design elements from luxury watches into his products for a long time. Zenbooks were the first opportunity to put this into practice,[5] the crossover being achieved, he said, by "the unfolding of the laptop from the side recalling the elegance of minute and hour hand movements".[6] The reference to watches is also reflected in the marketing of Zenbooks; Asus published design sketches overlaying an open Zenbook on a watch face, and video advertisements feature similar imagery.[7][8] The concentric circles on the lid of Zenbooks were intended to look like ripples in water and to reflect "philosophical ideas such as the infinite nature of Zen thinking and self-improvement".[5][6]

The bodies of the Zenbooks are made of aluminium, chosen for its light weight, strength, vibration dampening, appearance and acoustic properties.[5] Both the bodies and lids are CNC milled and brushed for appearance.[5] Reviewers have noted the resulting superior rigidity and complimented the appearance of the Zenbook range.[9][10][11] The lid is available in three colours: dark silver/purple (pictured), rose gold and hot pink.[5]

To preserve space, Zenbooks use two PCBs connected by a communications ribbon so it can have ports on both sides of the device, with a heatsink and fan centred between them.[12][13]

Product range

First generation

A UX31E with its accessories laid out

The first generation of Zenbooks was announced on October 11, 2011, one day before release, although they were first demonstrated at Computex 2011 in May that year.[14] Two models were released in 2011 to positive reviews: the 11 inch UX21E and the 13 inch UX31E, also frequently known as the UX21 and UX31 respectively. The design of the UX21 drew comparisons to the Macbook Air and it was regarded as an "excellent rival" by CNET reviewer Andrew Hoyle.[10][11] Other aspects of the laptops that reviewers liked were the Bang and Olufsen speakers, fast boot times due to Asus' BIOS design and the speed of general tasks within the operating system resulting from the SSD and Sandy Bridge processors.[9][11][15] However, the screens drew criticism for their poor contrast ratio, colour accuracy and less than perfect viewing angle, although they were praised for their brightness and the sharpness of the UX31's screen.[9][16][17] Reviewers also noted the shallow key-press of the metal keyboard and lack of backlighting, a feature that Asus did not have time to implement before shipping.[9][18]

Zenbook Prime

The UX31A keyboard is backlit and has greater key travel than the first generation

In April 2012 Asus revealed a revision of the two original Zenbooks, this time based on the Ivy Bridge microarchitecture.[19] The model numbers were UX21A and UX31A for the 11 and 13 inch models respectively but are more frequently referred to as Zenbook Primes.[19] Changes made to the original included the aforementioned update to Ivy Bridge processors and the introduction of the corresponding HM76 chipset bringing native USB 3.0, 1920 × 1080 IPS displays for both models, an Intel Centrino Wi-Fi controller, an improved trackpad and new plastic keyboard with backlighting.[20] The new screens were highly praised by reviewers when considering brightness, contrast ratio, viewing angle and colour accuracy, the improvements over previous models being put down to the switch from TN to IPS displays.[18][20][21] The UX21A has contrast ratio of 939 and the UX31A achieved 1085, giving it the highest resolution and contrast ratio of any ultrabook at the time of release.[21][22] The improved keyboard also garnered praise for the increased backlighting and improved key travel while the Intel Wi-Fi controller was found to perform better than the Qualcomm used in the first generation of Zenbooks.[20][21][23] The Zenbook Primes still received some criticism: the latest version of the trackpad was acknowledged as an improvement over the original Zenbooks, but still irritating,[24][25] and the sound quality was found to be worse than that with the first generation.[23][25] Despite these issues, the overall reaction was positive: the UX31A was called "today's best ultrabook" and "the best ultrabook out there" at the time of release.[26][27]

UX32 series

As early as March 2012, information was leaked hinting at a new series of Zenbooks and in early May Asus revealed the UX32 series, followed by their release on May 21.[28][29] Two models were announced: the UX32A and the UX32VD, both including a thicker chassis to accommodate a 500 GB/24 GB flash hybrid drive and in the UX32VD an Nvidia Geforce GT 620M.[29] The UX32A was designed to be a cheaper Zenbook with a previous generation Sandy Bridge processor option,[note 1] lower resolution screen and hybrid drive.[28]

The UX32VD was well received for similar reasons to the Zenbook Prime. The screen, chassis and keyboard again garnered praise although the inclusion of a discrete GPU was noted as a major selling point.[30][31][32] The hybrid drive attracted criticism for its slow performance and the same trackpad issues that the Zenbook Prime had were still present.[30][31][32] The UX32 models have a 4% smaller battery than the Zenbook Prime and the discrete GPU of the UX32VD consumes more power than the integrated GPUs of other Zenbooks; and the shorter battery life was also a detraction.[30][33] SLR Lounge criticised the slow hybrid drive and 4 GB of RAM, but suggested replacing them as the option is available, noting that it was an option not often offered on ultrabooks.[34]

As a cheaper option the UX32A was praised by Chris Martin of PC Advisor for being "a more affordable luxury", retaining the "premium feel" of the Zenbook range but at a lower price point.[35][36] The aluminium chassis, which is identical to the UX32VD to keep costs down, was widely acclaimed for its strength and build quality.[35][36][37][38][39] By contrast, the Sandy Bridge chip, a previous-generation part at the time of sale, was outlined as a detraction as was the lower battery life compared to the UX31E.[36][38] Although the screen used was a TN panel and of a lower resolution than the UX32VD or UX31A, it was considered an acceptable compromise for the price.[36][37] The screen has a matte finish and relatively high brightness which Notebook Check's reviewer, Christian Hepp, found "quite suitable for outdoor use", noting that it had a good contrast ratio but a narrow range of colours.[39]

14 and 15 inch Zenbooks

On October 23, 2012, Asus hosted a launch event for Windows 8, where it revealed UX42VS and UX52VS models to be released in November.[40][41] The UX42VS is a 14 inch ultrabook and the UX52VS is a 15 inch laptop, which may qualify as an ultrabook depending on the options chosen.[note 1][41] The UX42VS is available with an Intel Core i3, i5 or i7 processor with up to 6 GB of RAM. In total, it weighs approximately 1.9 kg (4.2 lb).[41]

The UX52VS has the option of Intel's ultra-low voltage i5 or i7 mobile processors, up to 10 GB of RAM and an optical disc drive. The latter is a first for the Zenbook product series.[42] It drew criticism for its high price and lack of touch screen, but the screen quality, keyboard and system speed were praised.[43][44] The battery life was considered acceptable taking into account the form-factor and the discrete GPU, despite it being significantly shorter than the UX31A.[44]

Zenbook Touch

First displayed in June 2012 at Computex, the Zenbook Touch series has touch screens to take advantage of the Windows 8 operating system.[45] The Zenbook Touch series includes the UX31A which is the same as the Zenbook Prime, but with a touch enabled screen, and the U500VZ, a 15 inch model.[45][46] A UX21A with a touch enabled screen was also demonstrated at Computex in June and officially announced in late August, though at the launch event on October 23, 2012, only the UX31A and the U500VZ were displayed.[45][47][48] The U500VZ is thicker than previous Zenbooks at 20 mm (0.79") and uses a standard Ivy Bridge mobile processor rather than the ultra-low voltage CPUs used in other Zenbooks, thus technically pushing it out of the ultrabook category, although it still meets other ultrabook specifications.[note 1][46][49] AnandTech reviewer Jason Inofuentes found the touch screen to be so superior to the trackpad that he stopped using the trackpad altogether in his trial of a Zenbook Touch at the Asus launch event.[50] Chris Griffith of The Australian found that the screen of the UX31A responded well and that the Windows 8 gestures worked predictably, his only criticism being the high price.[51]

Zenbook Infinity UX301

The Asus ZenBook UX301 is available in one variant: UX301LA. First displayed at Computex in 2013, the Zenbook Infinity has a Gorilla Glass body; a mobile Haswell CPU (i5 or i7); at least 8GB of RAM; and a 13.3-inch touchscreen with a maximum resolution of 2560x1440. In place of the single SSD used in previous Zenbook are two SSDs in a RAID 0 configuration.

Zenbook UX302

The Asus ZenBook UX302 is available in two variants: UX302LA, UX302LG

ZenBook UX303

The Asus ZenBook UX303 is available in five variants: UX303UA, UX303LN, UX303UB, UX303LA, UX303LB.[52]

Comparison of Specifications of Asus ZenBook UX303 models
Specifications UX303UA[53] UX303LN[54] UX303UB[55] UX303LA[56] UX303LB[57]
Processor Intel® Core™ i7 6500U

Intel® Core™ i5 6200U

Intel® Core™ i3 6100U

Intel® Core™ i7 5500U

Intel® Core™ i5 5200U

Intel® Core™ i7 4510U

Intel® Core™ i5 4210U

 Intel® Core™ i7 6500U

Intel® Core™ i5 6200U

 Intel® Core™ i7 5500U

Intel® Core™ i5 5200U

Intel® Core™ i3 5010U

Intel® Core™ i7 4510U

Intel® Core™ i5 4210U

Intel® Core™ i3 4030U

 Intel® Core™ i7 5500U

Intel® Core™ i5 5200U

Graphics Integrated Intel® HD Graphics 520 NVIDIA® GeForce® 840M with 2GB DDR3 VRAM NVIDIA® GeForce® 940M with 2GB DDR3 VRAM Intel HD Graphics 4400 NVIDIA® GeForce® 940M with 2GB DDR3 VRAM
Memory DDR3L 1600 MHz SDRAM, On Board Memory 4 GB , DIMM Up to 12 G DDR3L 1600 MHz SDRAM, On Board Memory 4 GB , SO-DIMM Up to 8 GB DDR3L 1600 MHz SDRAM, On Board Memory 4 GB , DIMM Up to 12 GB DDR3L 1600 MHz SDRAM, On Board Memory 4 GB , 1x DIMM socket, DIMM Up to 8 GB DDR3L 1600 MHz SDRAM, On Board Memory 4 GB , 1x DIMM socket, SO-DIMM Up to 8 GB
Display 13.3" 16:9 HD (1366x768) or IPS FHD (1920x1080) or IPS QHD+(3200 x 1800) 13.3" 16:9 IPS FHD (1920x1080) or QHD+( 3200 x 1800) 13.3" 16:9 HD (1366x768) or IPS FHD (1920x1080) or IPS QHD+(3200 x 1800) 13.3" 16:9 HD+ EWV (1600 x 900) or IPS FHD (1920x1080) 13.3" 16:9 IPS FHD (1920x1080) or QHD+( 3200 x 1800)
Interface 1 x COMBO audio jack

3 x USB 3.0 port(s) 1 x HDMI 1 x mini Display Port 1 x SD card reader 1X AC adapter plug

 1 x COMBO audio jack

3 x USB 3.0 port(s) 1 x HDMI 1 x mini Display Port 1X AC adapter plug

Battery 3 Cells 50 Whrs Polymer Battery
Dimensions (Width x Depth x Height) (mm) 323 x 223 x 19.2
Weight (kg) 1.45

Zenbook UX305

The Asus ZenBook UX305 is available in four variants: UX305FA, UX305CA, UX305LA and UX305UA[58].

Comparison of Specifications of Asus ZenBook UX305 models
Specifications UX305FA[59] UX305CA[60] UX305LA[61] UX305UA[62]
Processor Intel® Core™ M 5Y10

Intel® Core™ M 5Y71

 Intel® Core™ M 6Y30

Intel® Core™ M 6Y54

Intel® Core™ M 6Y75

 Intel® Core™ i7 5500U

Intel® Core™ i5 5200U

Intel® Core™ i3 5010U

 Intel® Core™ i7 6500U

Intel® Core™ i5 6200U

Intel® Core™ i3 6100U

Memory LPDDR3 1600 MHz SDRAM, 4GB, up to 8GB
Display 13.3" IPS FHD (1920x1080) or IPS QHD+(3200 x 1800)
Interface 1 x Microphone-in/Headphone-out jack

3 x USB 3.0 port(s)

1 x micro HDMI

1 x SD card reader

1X AC Zenbook UX30adapter plug

 1 x Microphone-in jack

1 x Headphone-out jack

3 x USB 3.0 port(s)

1 x micro HDMI

1 x SD card reader

1X AC adapter plug

 1 x COMBO audio jack

2 x USB 3.0 port(s)

1 x USB 2.0 port(s)

1 x micro HDMI

1X AC adapter plug

Battery 45 Whrs Polymer Battery 56 Whrs Polymer Battery
Dimensions (Width x Depth x Height) (mm) 324 x 226 x 12.3 324 x 226 x 14.9 324 x 226 x 16.0
Weight (kg) 1.2 1.3

Zenbook UX306

The Asus ZenBook UX306 is available in one variant: UX306UA

Zenbook UX310

The Asus ZenBook UX310 is available in two variants: UX310UQ and UX310UA

Zenbook UX330

The Asus ZenBook UX330 is available in two variants: UX330CA (Intel m processors) and UX330UA (Intel mobile i processors)

Zenbook Flip UX360

The Asus ZenBook UX360 is available in two variants: UX360CA and UX360UA. The Asus Zenbook Flip UX360 is a convertible notebook that flips from a laptop to a tablet. It competes with Acer Aspire R 14, Asus Transformer Book Flip TP300, Dell Inspiron 13 5000 Series 2-in-1, Dell Inspiron 13 7000 Series 2-in-1, Lenovo Yoga 3 14, Samsung Notebook 7 spin (13-inch), Toshiba Satellite Radius 12 and 14.

Zenbook Flip S UX370

The Asus ZenBook Flip S is available in one variant: UX370UA

Zenbook 3 UX390

The Asus ZenBook 3 is available in one variant: UX390UA

Zenbook UX410

The Asus ZenBook UX410 is available in two variants: UX410UA and UX410UQ

Zenbook UX430

The Asus ZenBook UX430 is available in three variants: UX430UN, UX430UA and UX430UQ

Zenbook 3 Deluxe UX490

The Asus ZenBook 3 Deluxe UX490 is available in one variant: UX490UA

Zenbook Pro UX501

The Asus ZenBook UX501 is available in one variant: UX501JW and UX501VW[63]

Zenbook UX510

The Asus ZenBook UX510 is available in two variants: UX510UW and UX510UX

Zenbook UX530

The Asus ZenBook UX530 is available in two variants: UX530UQ and UX530UX

Zenbook Pro UX550

The Asus ZenBook Pro UX550 is available in two variants: UX550VD and UX550VE

Zenbook UX560

The Asus ZenBook UX560 is available in three variants: UX560UA, UX560UQ and UX560UX. The Asus Zenbook Flip UX560 is a convertible notebook that flips from a laptop to a tablet. It competes with Acer Aspire R 15, Asus Transformer Book Flip TP500, Dell Inspiron 15 5000 Series 2-in-1, HP Envy x360, Lenovo Flex 3 15, Samsung Notebook 7 spin (15-inch) and Toshiba Satellite Fusion.

Zenbook Flip UX561

The Asus ZenBook Flip UX561 is available in three variants: UX561UD, UX561UN, UX561UA

Controversy

Numerous Zenbook models with resolution specifications of QHD+ (3200 × 1800) and 4K (3840 × 2160) utilize Pentile RG/BW displays,[64][65] which are regarded by some as a 'shady practice'[66] and 'sort of cheating'.[67]

Specifications

Table of models
Model UX21E[68] UX31E[69] UX21A[70] UX31A[71] UX32A[72] UX32VD[73] UX32L[74] UX42VS[75] UX52VS[42] U500VZ[46] UX301LA NX500 UX390UA
Release date Oct 2011[76] Jun 2012[77] May 2012[78] May 2012[79] Feb 2014[74] Nov 2012 November 2012 TBA Nov 2013 TBA Q3 2016
Display
Matte		 11.6" TN 1366 × 768 13.3" TN 1600 × 900 11.6" TN 1366 × 768
11.6" IPS 1920 × 1080		 13.3" TN 1600 × 900
13.3" IPS 1920 × 1080		 13.3" TN 1366 × 768 13.3" TN 1366 × 768
13.3" IPS 1920 × 1080		 13.3" HD 1366x768
13.3" IPS FHD 1920x1080		 14.0" TN 1366 × 768 15.6" IPS 1920 × 1080 13.3" IPS 2560 × 1440 15.6" IPS 3840 × 2160 12.5" IPS
1920 × 1080
Processor i3-2367
i5-2467M
i7-2677M		 i5-2557M
i5-2557M
i7-2677M		 i5-3317U
i7-3517U		 i5-3317U
i7-3517U
i7-3537U		 i3-2367M
i5-3317U		 i7-3517U i3-4010U
i5-4200U
i7-4500U		 i3-3217U
i5-3317U
i7-3517U		 i5-3317U
i7-3517U
i7-3610QM		 i7-3612QM i7-4558U
i7-4500U
i5-4200U		 i7 i5-7200U
i7-7500U
Graphics adapter Intel HD Graphics 3000 Intel HD Graphics 4000 Intel HD Graphics 3000
Intel HD Graphics 4000		 Nvidia GeForce GT 620M Intel HD Graphics 4400
Nvidia GeForce 840M		 Nvidia GeForce GT 645M Nvidia GeForce GT 645M Nvidia GeForce GT 650M Intel HD Graphics 4400, or Iris Graphics 5100 Nvidia GeForce GTX 850M Intel HD Graphics 620
Memory 4 GB 1333 MHz DDR3 Soldered 4 GB 1600 MHz DDR3 Soldered 4 GB 1600 MHz DDR3 Expandable 4 GB 1600 MHz DDR3L soldered with 1x expandable slot 6 GB 1600 MHz DDR3 Expandable 4–10 GB 1600 MHz DDR3 4 GB 1600 MHz DDR3 8 GB 1600 MHz DDR3L 4/8 GB 1600 MHz DDR3L 4/16 GB 2133 MHz LPDDR3
Secondary storage 64/128/256 GB SATA III SSD 128/256GB SATA III SSD 500 GB hybrid drive with 24 GB SSD/256 GB SSD 1TB HDD / 500GB SSH / 128GB SSD 320/500/750/1000 GB HDD 320/500/750 GB hybrid drive with 24/32 GB SSD Up to 512 GB SATA III SSD 2x128gb or 2x256gb SSD in RAID 0 configuration 128/256/512 GB SSD 256/512/1024 GB SSD
Wireless
 802.11 b/g/n Wifi and Bluetooth 4.0 802.11 a/b/g/n Wifi and Bluetooth 4.0 802.11 a/b/g/n or 802.11ac and Bluetooth 4.0 802.11 b/g/n Wifi and Bluetooth 4.0 802.11 a/b/g/n Wifi and Bluetooth 4.0 802.11 a/b/g/n/ac Wifi and Bluetooth 4.0 TBA 802.11 a/b/g/n/ac Wifi and Bluetooth 4.0
Battery 6 Cell, 4800 mAh, 35 Wh 4 Cell, 6840 mAh, 50 Wh 6 Cell, 4800 mAh, 35 Wh 4 Cell, 6840 mAh, 50 Wh 6 Cell, 6520 mAh, 48 Wh 3 Cell, 50 Wh 4 Cell, 6140 mAh, 45 Wh 8 Cell, 4750 mAh, 70 Wh [80] 6 Cell, 50.6 Wh 6 Cell, 96 Wh 6 Cell, 40 Wh
Unit weight 1.1 kg (2.42 lb) 1.3 kg (2.87 lb) 1.1 kg (2.42 lb) 1.3 kg (2.87 lb) 1.45 kg (3.20 lb) 1.45 kg (3.20 lb) 1.45 kg (3.20 lb) 1.88 kg (4.15 lb) 2.2 kg (4.94 lb) 2.0 kg (4.4 lb) 1.4 kg 2.2 kg (4.94 lb) 0.91 kg (2.0 lb)
Dimensions
Width × Height × Thickness (closed, at thickest point)		 299 mm × 196 mm × 17 mm (11.8" × 7.7" × 0.67") 325 mm × 223 mm × 17 mm (12.8" × 8.8" × 0.67") 299 mm × 196 mm × 17 mm (11.8" × 7.7" × 0.67") 325 mm × 223 mm × 17 mm (12.8" × 8.8" × 0.67") 325 mm × 223 mm × 18 mm (12.8" × 8.8" × 0.71") 325 mm × 223 mm × 18 mm (12.8" × 8.8" × 0.71") 325 mm x

223 mm x

5.5~18 mm

 340 mm × 239 mm × 21 mm (13.4" × 9.4" × 0.83") 380 mm × 254.5 mm × 21 mm (14.96" × 10.0" × 0.83") 380 mm × 254.5 mm × 20 mm (14.96" × 10.0" × 0.79") 325 mm x 226 mm x 15.5 mm (12.8" x 8.9" x 0.62") 378 mm x 255 mm x 19 mm (14.88" x 10.0" x 0.75") 296 mm x 191.2 mm x 11.9 mm
(11.65" x 7.53" x 0.47")
Peripheral connections 1 × 3.5 mm audio in/out jack
1 × USB 3.0 port
1 × USB 2.0 port
1 × micro HDMI
1 × mini VGA
SD card slot (UX31E only)		 1 × 3.5 mm audio in/out jack
2 × USB 3.0 ports
1 × micro HDMI
1 × mini VGA
SD card slot (UX31A only)		 1 × 3.5 mm audio in/out jack
3 × USB 3.0 ports
1 × HDMI
1 × mini VGA
SD card slot		 1 x 3.5mm audio in/out jack

3 x USB 3.0 port(s)
1 x HDMI
1 x mini Display Port
SD card slot

 1 × 3.5 mm audio in/out jack
2 × USB 3.0 port
1 × micro HDMI
1 × mini VGA
SD card slot
1 × RJ45 LAN port		 1 × 3.5 mm audio in/out jack
3 × USB 3.0 ports
1 × HDMI
1 × mini VGA
SD card slot
1 × RJ45 LAN port		 1 × 3.5 mm audio in/out jack
3 × USB 3.0 port
1 × HDMI
1 × external subwoofer connector
1 × mini VGA
SD card slot
1 × RJ45 LAN port		 1 × 3.5 mm audio in/out jack
2 × USB 3.0 port
1 × micro HDMI
SDXC card slot		 TBA 1 x COMBO audio jack
1 x USB 3.1 Type-C port

Notes

  1. 1 2 3 If equipped with a standard mobile processor then the laptop fails the ultrabook requirement of using an Intel Core ultra-low-voltage processor

References

  1. ↑ "Notebooks and Ultrabooks: UX301LA". ASUS. Retrieved January 1, 2014.
  2. ↑ "UX31 Completely DEAD". NotebookReview.com. Retrieved February 6, 2014.
  3. ↑ "Asus UX52VS". Notebook Check. Retrieved February 6, 2013.
  4. ↑ "Asus UX50V-RX05 review". CNET. August 9, 2009. Retrieved February 6, 2013.
  5. 1 2 3 4 5 6 "Zen Design". Asus. Retrieved October 9, 2012.
  6. 1 2 "ASUS ZENBOOK design ideas". Tech In Style. October 12, 2011. Retrieved October 14, 2012.
  7. ↑ "The ASUS ZENBOOK - Design Concept" (Youtube). Asus. Oct 11, 2011. Retrieved 6 February 2013.
  8. ↑ "ASUS ZENBOOK™ Design Story -- In search of craftsmanship beyond time". Asus. Oct 26, 2012. Retrieved 6 February 2013.
  9. 1 2 3 4 Lal Shimpi, Anand (October 22, 2011). "ASUS Zenbook (UX21) Review". Anandtech. Retrieved October 23, 2012.
  10. 1 2 Hoyle, Andrew (October 19, 2011). "Asus Zenbook UX21 review". CNET. Retrieved October 22, 2012.
  11. 1 2 3 Stables, James (October 17, 2011). "Asus Zenbook UX21 review". Tech Radar. Retrieved October 22, 2012.
  12. ↑ Lal Shimpi, Anand (June 3, 2012). "ASUS Zenbook Prime (UX21A) Teardown". Anandtech. Retrieved October 23, 2012.
  13. ↑ Lal Shimpi, Anand (October 18, 2011). "ASUS Zenbook UX21 Teardown". Anandtech. Retrieved October 23, 2012.
  14. ↑ Savov, Vlad (May 30, 2011). "ASUS outs UX21 ultrathin laptop with up to Core i7 CPUs". Engadget. Retrieved October 14, 2012.
  15. ↑ Dalziel, Spencer (July 11, 2012). "Asus UX31 Zenbook review". T3. Retrieved October 23, 2012.
  16. ↑ Muller, Sasha (March 8, 2012). "Asus Zenbook UX21 Review". PC Pro. Retrieved October 23, 2012.
  17. ↑ Hoyle, Andrew (November 9, 2011). "Asus Zenbook UX31 Review". CNET. Retrieved October 23, 2012.
  18. 1 2 Silbert, Sarah (August 12, 2012). "ASUS Zenbook Prime UX31A Ultrabook review: a high-res display, and a much-improved keyboard". engadget. Retrieved October 23, 2012.
  19. 1 2 Sakr, Sharif (April 25, 2012). "ASUS Zenbook Primes with 1080p IPS panels and probable Ivy Bridge CPUs are real, coming to Taiwan in June". engadget. Retrieved October 23, 2012.
  20. 1 2 3 Lal Shimpi, Anand (May 22, 2012). "ASUS Zenbook Prime (UX21A) Review: The First of the 2nd Gen Ultrabooks". Anandtech. Retrieved October 23, 2012.
  21. 1 2 3 Walton, Jarred (August 28, 2012). "ASUS UX31A: Putting the Ultra in Ultrabooks". Anandtech. Retrieved October 23, 2012.
  22. ↑ Gade, Lisa (March 2012). "Best Ultrabooks: Ultrabooks Rated". Mobile Tech Review. Retrieved October 24, 2012.
  23. 1 2 Bolton, Matthew (September 11, 2012). "Asus Zenbook Prime UX31A review". Tech Radar. Retrieved October 23, 2012.
  24. ↑ Skipworth, Hunter (July 26, 2012). "Asus Zenbook Prime UX31a review". Pocket Lint. Retrieved October 23, 2012.
  25. 1 2 Hollister, Sean (July 5, 2012). "Asus Zenbook Prime UX31A review". The Verge. Retrieved October 23, 2012.
  26. ↑ Walton, Jarred (August 28, 2012). "ASUS UX31A: Putting the Ultra in Ultrabooks". Anandtech. Retrieved October 9, 2012.
  27. ↑ Girbea, Andrei (July 23, 2012). "Asus Zenbook Prime UX31A review – the best ultrabook out there right now". Ultrabook Review. Retrieved October 9, 2012.
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