First Look: Viewsonic G Tablet and Tegra 2 Performance Previewby Vivek Gowri on December 9, 2010 3:04 AM EST
The slate computing market is about to explode, with a literal flood of new tablets releasing over the coming months. Many of them will be Android based, running Nvidia’s Tegra 2 SoC. Nvidia made a big deal about Tegra 2 back at CES 2010, but for some reason, it’s taken quite a bit of time for anything running the platform to hit the market. Finally, we have one - the Viewsonic G Tablet.
The Tegra 2-based Viewsonic G Tablet showing the Tap UI homescreen
The specs are pretty straightforward; we’ve got a 10” WSVGA display with LED backlighting, Android 2.2 with a specialized UI skin on top, a 16GB microSD card, 2.4GHz 802.11n, Bluetooth 2.1, a 27 Whr lithium ion battery, and the Tegra 2 SoC. The dual-core Cortex A9 is clocked at a nice, round 1 GHz, and there’s 512MB of LPDDR RAM on board. The GPU is Nvidia’s Ultra-Low Power GeForce GPU and there are separate HD video encode and decode blocks also onboard. But the big deal with Tegra 2, as Anand went over in his first look at the SoC, is Cortex A9. The A9 is an out of order architecture with a relatively short pipeline, so it should be significantly faster than the in-order A8 on a per-clock basis.
But before we get to the performance aspect, let’s give the tablet a once over. The Viewsonic is not the most interesting physical specimen, just a screen with a thin bezel around it. From the front, it looks nearly identical to the Galaxy Tab and any number of other tablets on the market. The sides are pretty plain, with volume buttons at the top and a dock connector and mic at the bottom. The left side has a mini USB port, a headphone jack, and a power jack, while there are speakers on either side. The back is filled with logos - Viewsonic, the gTablet logo, the American distributor’s logo, barcode, FCC ID, etc - but otherwise pretty plain. Build quality is actually pretty decent and the tablet has a pretty weighty feel in hand. There’s no flex anywhere, and while the casing doesn’t feel particularly high quality, it’s not low quality by any means. There are some touches in the industrial design that make it seem a bit cheap. The capacitive touch buttons are off-center and easy to press inadvertently, and the physical buttons are placed pretty haphazardly. One thing that really threw me off is the volume rocker, which is switched from the logical layout (volume up is the lower button, volume down is the upper button).
The Viewsonic (left) next to the Samsung Galaxy Tab, both on maximum brightness, to illustrate the viewing angles of both tablets
But for $399 for a Tegra 2 tablet, minor quibbles about build quality and industrial design are about what one should expect. I also expected a not-so-great screen, but not like this. I know that not everyone can splurge like Apple did and go for an IPS screen, but when you look at the TN panels in these and other tablets, it really does make sense. The problem isn’t contrast ratio, the 432:1 figure is actually pretty good for a netbook screen and much better than most small notebooks. It doesn't match the iPad's amazing 934:1 contrast ratio, but still, contrast is not the problem. Unfortunately, the max brightness is not that high at 186nits, which only exacerbates the terrible viewing angles. Something I’ve realized in using tablets - the viewing angles matter a whole lot more than they do in laptops. As is typical with widescreen displays, the horizontal viewing angle is decent, but the vertical viewing angle is pretty bad - anything more than 30 degrees off center and the screen completely washes out. If I try to lay it flat on my desk and use it like my iPad or the Galaxy Tab, it’s basically impossible to see anything on the screen. For a device with a usage model so heavily dependant on good off-center viewing angles, speccing a screen with poor viewing angles was a pretty big oversight.
Viewsonic's Tap UI landscape split keyboard in the revised browser interface
Viewsonic loaded their own Tap UI onto the G Tablet. It’s a decent looking UI, but it’s aggravatingly slow and makes most of the navigation through the OS pretty painful. As with most tablets, there’s no Market preinstalled on the G Tablet (Samsung is the exception here, since they have managed to work around the Android Market restrictions). However, the XDA developers forum is your friend - there’s a simple workaround to get Market and other Google applications enabled, and it’s also possible to disable the UI skin. We’ll go over the software package and hacking aspects of the G Tablet in the full review; for now just know that the preloaded UI is pretty terrible, you'll want to disable it as soon as possible.
The G Tablet (center) next to the Galaxy Tab (left) and T-Mobile G2 (right)
Our first impressions of the G Tablet, beyond the woeful viewing angles and the unfortunate UI skin, is actually that of a fairly usable budget tablet. The user experience is actually pretty decent once you get out of the main UI and into an app or a browser window, and the split keyboard in landscape mode is much better than expected. The tablet has a nice, weighty feel in hand, but if you're using it in landscape mode, it might feel a little heavy for one-handed operation. The touchscreen is responsive enough, though it doesn't feel quite as sensitive as the Galaxy Tab or the iPad. That could just be because of the overall sluggishness of the UI, but we'll see about that after I load the stock Android UI onto the G Tablet. We'll see, but at first brush it looks like the main problems with the Viewsonic are the screen and the UI. We'll have a full review later on with more complete impressions and battery life numbers, but for now, we'll leave you with a preview of Tegra 2 performance.
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warisz00r - Thursday, December 9, 2010 - linkIt daunts me that a well-known manufacturer of quality desktop LCDs cannot put the same quality on their tablets'.
caballist - Thursday, December 9, 2010 - linkViewsonic aren't producing these, apparently they are a rebadge of the Malata zPad.
SandmanWN - Thursday, December 9, 2010 - linkThat must be it. I have a Viewsonic TN panel on my desktop and its definitely one of the best TN panels you can get. The viewing angles are great and the lighting is spread very evenly. But this pad being reviewed is obviously not cared for to the same degree.
xype - Thursday, December 9, 2010 - linkIt does seem plenty fast in the benchmarks—but if the UI is indeed slow/sluggish, doesn't that invalidate it when you actually hold it in your hands? If hardware accelerated UI is only coming in Android 3.0, the manufacturers are making a mistake trying to rush to market only to leave a bad first impression, in my opinion at least.
Also, if it's indeed a consumer gadget, "loading the stock Android UI onto the X Tablet" shouldn't really factor into the verdict (of the review that's to follow), or?
VivekGowri - Thursday, December 9, 2010 - linkThat's a function of the skin that Viewsonic put on top of Android, not Tegra 2's actual real world performance. Seriously, the skin makes a huge difference, my G2 feels blazing compared to basically any and every other Android phone, I'd bet until the Nexus S starts shipping I won't see a smoother Android device.
VivekGowri - Thursday, December 9, 2010 - linkAlso, as far as hackability factoring into the review, I figure that most Anandtech readers would be interested in it. It's not that difficult to do, and if it can take an almost unbearable device in stock form and make it acceptable to use, that's definitely worth taking into consideration.
xype - Thursday, December 9, 2010 - linkOh, don't get me wrong, I was talking about the verdict in the "average consumer" sense. I know that most people around here are interesting in a complete review—ROM flashing, overclocking, water cooling etc is what makes geeky stuff fun.
It's just a question of whether the Tablet—without the flashing—is really in a state that actually makes sense in the market. The Tegra 2 is super fast, no doubt about that. I'm just constantly wondering if none of the manufacturers realizes that they're making a bad impression where it counts, namely with Joe Sixpack.
Apple is selling the iPad as a "magical device". If their "competition" is making products where you have to spend time doing arcane (to most people) stuff to get it working decently, won't that just play into Apple's hands?
jtsmall - Saturday, December 11, 2010 - linkI agree with your UI comments. TnT is gastly, so much so that though I understood and have been waiting on the Tegra2 to appear I almost returned my copy after the first week - even considering the amazing price of $380.
Once I had work the stock TnT time dust and grasped the xda-developers experiences I rooted and installed T T Lite 2.2. What I experienced can hardly be expressed. The G tab nearly jumped out of my hands. The speed up is awesome. Everything runs superfast.
Launcher2.0 and the stock Android UI completely erase the initial negative impression. Viewing angle is just fine in my hands but of course YMMV.
I say two thumbs way up.
PS. DIY may note the connections and space exist for an additional 512 MB RAM, an LTE radio
jtsmall - Saturday, December 11, 2010 - link(cont) probably a 3G radio and GPS space unpopulated.
It is the same weight and thickness as the iPad, tho the iPad looks thinner to my uncalibrated eye. I like the widescreen ratio for reading in portrait orientation. But I do wish it was 1024 x 768 or more resolution - but it's not a deal breaker for my use.
One should note the connections: USB, miniUSB, headphone, microphone and microSDHD plus an expansion port that is said to supple 1080p and other connections via a dock to be released. And amazingly the stereo speakers actually work.
the G tab may look like a frog at first take, but make the needed changes and you have a prince. But perhaps most importantly, it is here and now at a fair price.
IntelUser2000 - Thursday, December 9, 2010 - linkCould you guys say what the browser was used on the comparisons? They make a HUGE differences, just like Android builds do. At least add firefox comparisons or something. Back up claims with facts please!