Asus Transformer 3 T305CA Review

Category: Review and Unboxing
28 0

Summary: From what I can tell based on the tested sample, the Transformer 3 T305CA is a sleek and portable tablet with an excellent screen, great speakers and the performance to face daily tasks well. However, I feel that in order to make it thin and light, Asus sacrificed functionality by cutting off the kickstand and designing a limiting keyboard folio, which for me are deal-breakers, despite the fact that the device otherwise checks most of the right boxes. 


well built and very sleek; excellent screen with pen suport; the keyboard types well while placed on a flat surface; decent performance in daily use; runs dead quiet and not very hot; excellent speakers; good cameras; Thunderbolt 3 port


limited use as a tablet and laptop due to lacking a kickstand and to the fixed-angle keyboard folio; potential short battery life; limited IO; plenty of bloatware

Asus launched an entire series of Windows 10 tablets earlier this year, Now I’m going to cover the mid-ranger Transformer 3 T305CA in this post, with whom I’ve spent time in the last few weeks.

Its main selling points are a 12.6-inch touchscreen with digitizer and pen support, a fanless Intel Kaby Lake hardware platform and a Thunderbolt 3 port, all tucked in a thin and light metallic body. The T305CA is also more affordable than the Pro version, starting at $749 on another store.

You’ll find where this device shines and where it trails behind from the article below. As a quick summary, it’s a pretty great device with a nice and bright screen, good performance for daily use, pretty good speakers and decent battery life. However, its practicality is limited by what I consider a poorly designed keyboard folio and the lack of an adjustable kick-stand, which in my opinion is simply a dumb design decision. Keep reading to find out why.

Specs sheet as reviewed

Asus Transformer Pro T305CA
Screen 12.6 inch, 3:2 format, 2880 x 1920 px resolution, IPS wide-gamut, multi touch
Processor Intel Kaby Lake Core m3-7Y30
Video Intel GMA HD 615
Memory 4 GB LPDDR3 (soldered)
Storage 256 GB M.2 SSD
Connectivity Wireless AC, Bluetooth 4.1, WiDi
Ports 1 x USB 3.1 Thunderbolt 3, mic/earphone, 2 MPx front-camera and 13 MPx rear-camera, fingerprint sensor
Battery 38.5 Wh
Operating system Windows 10
Size Tablet: 303 mm or 11.92” (w) x 202 mm or 7.95” (d) x 6.9 mm or 0.27” (h)
Tablet + Folio: ~14 mm or 0.55″ (h)
Weight Tablet: 0.69 kg or 1.52 lbs
Tablet + Keyboard Folio: 1.14 kg or 2.50 lbs
Extras backlit keyboard folio, 4 speakers, available in two colors

Design and exterior

The Transformer 3 T305CA is one of Asus’s best built tablets ever launched. Metal is used for the entire case and the construction is solid, with little to no flex or squeaks when grabbing it in hand. The chamfered edges and rounded corners also make for an excellent feel when holding it, and the textured back does have a decent grip. However, make sure you’ll treat the back well, that texture with concentric circles around the Asus logo seems like is going to scratch easily.

Asus offers this tablet in two color option, a darker one (Titanium Gray) that we have here, which shows smudges fairly easily, and a lighter one (Icicle Gold) that should do a better job at concealing them. They are paired with matching keyboard folios that we’ll address further down, which are also available in shades of orange and beige.

The thin profile and light weight are some of the aspects Asus advertises for the T305CA and for a good reason: at 7 mm thick and under 700 grams, this is one of the sleekest devices in its class, more compact and lighter than the iPad Pro 12.9 (which however offers a slightly larger screen) and only a tad larger than the Samsung Galaxy Tab Pro S (which only offers a 12-inch screen though).

As a direct consequence of the sleek profile the IO is limited, with a single USB Type-C port placed on the bottom right edge, as well as a 3.5 audio jack (on the lower-left side) and a fingerprint sensor on the top end, which also acts as the Power button. The fingerprint sensor works great for logging into Windows 10. However, the most important aspect of the IO is the Thunderbolt 3 compatibility of the USB C port, with all its potential benefits.

When it comes to the IO it’s also important to mention that Asus bundle this tablet with an adapter that includes an USB-C port, a full-size USB 3.0 port and an HDMI connector, which you can hookup via the USB-C port on the slate when in need for extended connectivity. There’s also a larger adapter with two USB 3.0 slots, a card-reader, HDMI, VGA and LAN ports, plus dedicated mic and earphone jacks, alongside the USB-C connector, which you can buy on the side. Neither of these were included with my test sample though, so I can’t tell you anything about them for the time being.

Bottom point, the Transformer 3 T305CA is a very well built and good looking tablet with a pretty large screen. Its compact shape and light body weight make it great for everyday use and while the IO is limited, I don’t feel that’s a deal-breaker on such a device, especially since an adapter that will cover most of your needs is included. What I mean by “such a device” is a tablet meant mostly for daily use, for browsing, multimedia content, email, maybe some text-editing. I do most of these on my iPad as well and hardly ever needed ports, and keep in mind the iPad doesn’t offer any adapter in the box while the T305CA does, in case you want to hook up an external hard-drive to transfer some content or maybe output video via HDMI, if you don’t have a WiDi adapter for your TV.

Keyboard Folio

The folio Asus pairs the Transformer 3 T305CA with acts as a protective sleeve that wraps around the tablet when traveling, or as keyboard with a support for the tablet to rest on, with two fixed angles, as you can see in the pictures below.

The sleeve functionality works fine. The laptop functionality is also decent. The fixed angles are however limiting factors, but also the fact that the keyboard part is pretty large by itself and requires plenty of space on your desk, plus it doesn’t offer a raised positioned like on the Pro model, so there’s no ergonomic inclination when typing. This keyboard just lies flat.

Tablet functionality on the other hand is more basic than I’d want, as the sleeve cannot be used to support the slate in a stand mode, so you’ll pretty much have to disconnect the T305CA from the folio for tablet use. And that means, like I said above, you’ll either have to hold it in hand or perhaps lean it by something. So, if you want to watch a movie or an Youtube clip while eating, in bed before sleep (something I often do) or when flying in coach, there’s no way for the T305CA to stand by its own. It’s true most other alternatives lack this ability as well, but at least for the iPad Pro you can find third party folios similar to the one I have on my iPad Air and get the needed functionality.

There’s of course a fair chance you might care little about these things mentioned in the previous paragraphs, but I for one sure do, mostly because I see this Transformer 3 as a potential alternative for an iPad and due to how I mostly use my iPad. That’s why I find Asus’s decision to skip the kickstand rather stupid, especially since they put it on most of their other Transformers.

The tablet hooks to the keyboard folio via a physical connector on the bottom and the pairing is assisted by magnets, but is not as smooth as on the Transformer 3 Pro. You pretty much have to place the tablet at a certain angle to hook up properly on the Transformer 3, while on the Pro you merely have to get the folio’s and the slate’s connectors in close proximity and the magnets would take care of the rest. Not a deal-breaker though, as it’s something you can get used to.

The folio is made from plastic with a soft velvet like finishing on the back and the interior, so it feels nice in daily use, is fairly sturdy and provides good grip on a desk. Basically the only way you can actually use this device for typing is on a flat surface that stabilizes the folio. That’s a pity, especially since the keyboard actually types surprisingly well.

The feedback is similar to the one on the T303UA’s folio, with an adequate response, good resistance and decent key-travel, at 1.4 mm. The layout is pretty standard for an Asus ultraportable and the keys are backlit, with three levels of intensity to choose from.

As long as you keep the Transformer 3 on a desk and have enough room on it for its keyboard folio to unravel, you’ll probably be happy with the typing experience. On the other hand, if you plan to use it in cramped spaces or on the lap, the folio’s design and chassis-flex hinders the experience to some extent.

The trackpad sits beneath the keyboard, centered on the folio, and it’s a plastic surface made by Elan and certified as a Precision Touchpad, which means it leaves little room for adjustments and customization. Still, the experience is mostly OK with daily use and even the click buttons performed great, but I did run into occasional cursor jumpiness, especially when resting my left thumb on the surface and swiping around with the fingers on my right hand, which would cause the cursor to jump to the bottom left corner quite often. I noticed a similar behavior on the Transformer 3 Pro and most of the recent Asus Zenbooks, so hopefully that’s something they’ll be able to address with future drivers, as I expect to see complains across the entire range.


There’s a 12.6-inch touchscreen on the Transformer T305CA, with a 3:2 aspect ratio, a resolution of 2880 x 1920 px and a wide-gamut panel.

The touch-related part works great and the display includes an NTrig digitizer that should work well with the Asus Pen you’ll find in the box with retail units. My sample didn’t include one, so I can’t tell you anything about its feel and performance.

Compared to the panel used on the Transformer 3 Pro, the one of the T305CA is brighter and with a superior contrast, which makes it usable in strong-light as well, although you’ll still have to live with the glare caused by the layer of protective glass on top. The color coverage remains top notch, with 87% AdobeRGB coverage measured in our tests, but the screen gets a fairly strong blue-hint out of the box and pretty poor color uniformity, so I suggest calibrating it or using our ICC profile available over here.

You’ll find more details about the panel and its performances below. The results are measured with a Spyder4 Elite sensor.

  • Panel HardwareID: BOE  BOE06D0 (NV126A1M-N52);
  • Coverage: 100% sRGB, 84% NTSC, 87% AdobeRGB;
  • Measured gamma: 2.3;
  • Max brightness in the middle of the screen: 406 cd/m2 on power;
  • Contrast at max brightness: 680:1;
  • White point: 8600 K;
  • Black on max brightness: 0.60 cd/m2;
  • Average DeltaE: 0.65 uncalibrated, 0.64 calibrated.

I did notice some screen flickering on solid colors at low brightness with the naked eye, so that’s something to further look into.

Hardware and performance

This device is built on a fanless Intel Kaby Lake hardware platform, and our test model came with a Core m3-7Y30 processor with integrated Intel GMA HD 615 graphics, just 4 GB of RAM and a 256 GB SSD.

The RAM and the CPU are soldered on the motherboard, yet for storage a Sandisk Z400 SD8SNAT-128G-1002 unit was used, which suggests an 80 mm M.2 SSD that can be theoretically replaced with something else. That’s a B-M key SSD though, so faster PCIe drives are probably not compatible (they’re not even listed as options on Asus’s site) and actually opening up this device is a complex process I wouldn’t recommend to casual users, as the chance of cracking the screen if you don’t know what you’re doing is pretty high.

In other words, get the configuration you want from the beginning. Higher end configurations with Core i5 and i7 Y processors, up to 8 GB of RAM and 512 GB of storage will be available sooner.

When it comes to performance, I can say that the Core m3 configuration on our test sample did not perform to the best of its abilities, as it was not capable of fully utilizing the Turbo Boost speeds advertised for this processor. That’s not unexpected from early samples, so we’re not going to get into benchmarks results.

However, despite that the daily use experience was pretty good. Our sample was able to run video content of any sort easily, including 4K and HEVC and felt snappy in light-daily multitasking with Office, a browser with 7-10 tabs open and Skype running at the same time. Do keep in mind there’s a Core Y processor inside this thing and don’t expect flawless experience once you push multitasking more and don’t expect to run demanding software on this Core m3 with only 4 GB of RAM. Also, in order to get the most out of this computer you should take care of the bloatware that comes preinstalled or better yet perform a clean Windows reinstall.

Even with the CPU’s speed capped down, I was able to run Minecraft well though and even Need For Speed: Most Wanted with low details at decent frame rates, but I can’t yet tell for sure how it compares to the Intel 515 graphics on the Skylake Core Ys based on this sample.

You’ll find more details on performance and temperatures in various use scenarios from the pictures below, but take them with a grain of salt, I expect the retail configurations to fare much better under load.

Of course there’s always the option to opt for the Core i5-7Y54 or the Core i5-7Y75 configurations, but I don’t think that’s a great idea. Those are still Core Y processors with limited TDPs and they can’t offer much before getting TDP and thermally limited on such a thin design.

Noise, Heat, Connectivity, Speakers and others

There’s no fan inside the T305CA, no spinning hard-drive and I haven’t noticed any coil whining or electric grinning either, at least not something you could spot at ear level, so in summary this thing runs dead quiet all the time.

Outer-case temperatures are fairly good as well. For daily use, most parts rest at around 35 to 37 degrees Celsius, which might cause your hands to sweat on hot summer days, but otherwise are within the comfort limits.

On heavy loads certain spots will get closer to 45 degrees Celsius and it gets unpleasant holding the tablet at this point, but you’re not going to feel the heat in “laptop” mode. Keep in mind we had the basic Core m3 configuration here, the Core i5 and i7s will get hotter, which is another reason to consider the m3 as your first pick.

*Daily Use – 1080p Youtube clip in EDGE for 30 minutes
*Load – playing Need for Speed Most Wanted for 30 minutes

Connectivity wise there’s Wireless AC, WiDi and Bluetooth 4.1 on this device. Asus went with a dual-band Intel AC 8260 wireless module on the test unit, which performed very well when close to my router. The speeds and signal strength dropped significantly at 30 feet with 2 walls in between in my apartment, but the tablet was still capable of loading websites and movies without any stuttering. And keep in mind I have some very thick walls over here, so expect it to perform better in your environment.

The speakers are surprisingly good on this device. Asus went for 4 individual speakers placed on the lateral edges. Their grills can be obstructed by your hands when holding the tablet, but even so you’re not going to cover all of them at the same time, so the audio quality isn’t going to suffer that much.

And speaking of that, the sound coming out of those speakers is loud (around 92 dB at head-level in our tests) and really punchy for this class, with good mids, no distortions and even a little bass with the Music profile selected in the included Audio app. I can say these speakers easily put the iPad Air to shame and are probably some of the best you can find on any slate right now.

The cameras on the T305CA are not bad either. There’s a 13 MPx main shooter on the back, for those of you that might take pictures with a giant slate (Don’t!), and what matters more to me, a 2 MPx front shooter that provides some decent shots for your video calls, at least in good light. The microphones are fairly capable as well and they are placed on top of the screen. There’s no IR camera for Windows Hello like on the Transformer 3 Pro, but I find the use of the fingerprint-sensor much more convenient and accurate for logging in anyway.

Battery life

There’s a 38.5 Wh battery on this tablet, paired with a Core m3 processor on one side and a bright wide-gamut screen on the other, so the battery life results are average at best. Check out the numbers below (the screen’s brightness is set at 25%, around 120 nits, and the Keyboard Folio was hooked up in all tests).

  • 7.5 W (~5 h 10 min of use) – very light browsing and text editing in Google Drive, Balanced Mode, screen at 40%, Wi-Fi ON;
  • 7.5 W (~5 10 min of use) – 1080p fullscreen video on Youtube in Internet Explorer, Balanced Mode, screen at 25%, Wi-Fi ON;
  • 5.5 W (~7 h of use) – 1080p fullscreen .mkv video in the Movie app, Balanced Mode, screen at 25%, Wi-Fi ON;
  • 7 W (~5 h 30 min of use) – 4K fullscreen .mkv video in the Movie app, Balanced Mode, screen at 25%, Wi-Fi ON;
  • 12.5 W (~3 h of use) – heavy browsing in Edge, Balanced Mode, screen at 25%, Wi-Fi ON.

The results are higher than I was expecting and mostly on par with the Core i7 U version of the Transformer 3 Pro. I was hopping the Core m3 processor to have a more significant impact on energy consumption, but that didn’t happen here. Still, that might be the case with the final retails units, so take these measurements with a grain of salt for the time being.

The keyboard folio eats around 0.5  to 1 W by its own (1 W with the illumination at max, 0.5 W with it switched off), so that means the tablet-alone will last a little longer in all situations.

A 45 Wh charger is included in the pack without retractable prongs. Oddly it’s white and not black like on most other Asus devices, which means it stands out more and that’s not something I appreciate. The tablet charges via USB-C.

Price and availability

The Transformer 3 T305CA is now available in our stores, with a starting price of $749 in the US for the base version in the other stores, but you can find the more affordable price available here in our stores.

The keyboard folio, the pen and a basic adapter (USB-C, USB-A 3.0 and HDMI) are all included in the default bundle.

Like I said earlier, I’d recommend going for a Core m3 configuration on this device, preferably with 4 gigs of RAM and 256 GB of storage.

Wrap up

From what I can tell right now, the Transformer 3 T305CA checks many of the right boxes. It’s built well, it feels great in hand, it packs an excellent screen with pen support, it gets some great speakers and should offer adequate performance and battery life for daily use.

Even so, the Core m3 platform was snappy enough for daily use, but the battery life readings were short of my expectations, my other nits are with some of the design decisions. In order to make this slim and light, Asus cut off the kickstand on the back and opted for a limiting keyboard folio, which combined hinder the experience in tablet use or when typing anywhere else but on a roomy flat surface. That means you’re not going to be able to use the tablet on its own unless you’ll hold it in your hands and you’ll struggle to type on the lap or in any cramped spaces, due to how the folio was conceived.

These aspects alone would make me think twice before choosing the Transformer 3 over its main competitors, which are mostly the Surface Pro 4, the HP Spectre X2 and perhaps the Samsung Galaxy Tab Pro S.

The first two offer smaller screens and kickstands, while all three are built on Skylake Core Y platforms, at least for the time being, but that’s not a deal-breaker since Kaby Lake is not a significant upgrade over Skylake. The Surface gets expensive once you add-up the folio and is only available with very basic specs, but is quite efficient, while the Spectre x2 has an excellent price and very few flaws, as for the Galaxy Tab Pro S, this one is highly portable, but lacks a kickstand, its keyboard is very shallow and the battery drains up quickly.

With that in mind we’ll wrap this up here. In the meantime, I’d like to hear your thoughts, please do comment below. If you have feedbacks, suggestions, comments. Basically, it makes my heart fuzzy to know you were here,,

Leave a comment


Register now to get updates on promotions and coupons.