GPU Performance

I threw GLBenchmark on the Kindle Fire (Android apps can be sideloaded via USB and a file manager to run the .apk) to see if Amazon skimped on its GPU driver optimizations. Luckily it didn't, the Kindle Fire's PowerVR SGX 540 performs just as well as you'd expect it to:

GLBenchmark 2.1 - Egypt - Offscreen

GLBenchmark 2.1 - Pro - Offscreen

Vellamo Overall Score

WiFi Performance

Amazon didn't sacrifice compute in building the Kindle Fire, but WiFi performance is pretty bad. As I alluded to in our earlier piece on Silk performance, the Fire is limited to around 15Mbps over 2.4GHz 72Mbps 802.11n (5GHz isn't supported):

WiFi Performance

It's unclear if this limitation is due to the TI WL1271 chip on-board or if Amazon just didn't tune the WiFi driver stack for performance vs. power consumption. I'd assume the latter given the focus of the Kindle Fire.

I also measured transfer rates over USB 2.0 to confirm this wasn't some NAND performance limitation. The Kindle Fire uses a single 8GB eMMC package from Samsung. Sequential read speeds were nice and high at 24MB/s, but sequential writes to the device were noticeably lower. I measured between 4 - 6MB/s, which isn't unheard of for low-end NAND. The lowest sequential write speed I measured is still 2x the speed of the fastest transfer I recorded over WiFi, so this is definitely the result of the wireless stack.

Keyboard & User Experience Battery Life: 6 Hours
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  • geniekid - Tuesday, November 29, 2011 - link

    Just to add to what I said. At the start of the review you say "The Kindle Fire and iPad 2 couldn't be more different. They are vastly different sizes, shapes and prices. They even serve slightly different functions."

    I strongly disagree with that statement. If you asked me what a Fire was out of the blue, I'd say it was a tablet that let you read ebooks, watch movies, browse the internet, and run some third party apps. I'd say the exact same thing if you asked me what an iPad was. Without reading a review comparing the two, I would never know why the iPad is better at all those things. And I would never know why I might still buy a Fire knowing that the iPad is superior at all those things.
  • DukeN - Tuesday, November 29, 2011 - link

    I feel like I'm RIM's personal crusader here on AT, as you seem to neglect their products quite a bit.

    Is this really a better device than the $199 Playbook? I suppose for Amazon content oriented folks it might be. Using that specific use niche as a decision maker, the Playbook would be better for those looking to pair it with their Blackberry device (no data plan required, or even Wifi).

    The playbook at the same price right now gives you twice the storage, dual 5MP and 3MP cameras, 1080p video recording and silky smooth browser/multi-tasking performance.

    Is the Fire really the best $199 tablet at the moment? I think until they spec up their hardware this isn't the case.
  • VivekGowri - Wednesday, November 30, 2011 - link

    Can we have this conversation after the PlayBook gets a native email client?
  • DukeN - Wednesday, November 30, 2011 - link

    Um, it has one called the web browser. Just the way MAJORITY of people access their email with a PC/notebook at home. And it has one that works with users with Blackberry devices. Secondly, knowing that it is coming in February, doesn't it make more sense to buy the better hardware that will add one piece of software functionality? Also, I'll tell you what's blatantly unacceptable, A TABLET WITHOUT A CAMERA.
  • Reflex - Wednesday, November 30, 2011 - link

    Um, you can have web based email on a 7" screen. I'll take a native app, thanks. Web layouts suck on small screens. Furthermore, web based clients suck if I'm not online at the time, I can compose and send messages in an airplane on my Fire just fine and they will get delivered the next time I connect to a WiFi AP7, on a Playbook I'm stuck.

    Not saying the Playback is a bad device. Only that its incomplete in ways that the Fire and Nook are complete. If you have a BB, a Playbook is pretty much a given, but for the rest of us, thats not the case.
  • DukeN - Thursday, December 1, 2011 - link

    If email is that critical to you, as a deciding factor, you probably already have the best thing for email. It's called a BLACKBERRY. And chances are, the only tablet you would then want to buy is a Playbook.

    The Fire is like buying a Core 2 Duo because it supports Outlook, while the Playbook is like an i7 that only supports Outlook Web Access until February.

    Missing cameras, and half the storage (8GBs will go FAST) is a bigger shortcoming IMO.

    Also, by your own words, if you have a BB the playbook is a given. So for millions of people in North America, it is the best tablet, according to you. So how is the Kindle a better buy, at $199?
  • Reflex - Thursday, December 1, 2011 - link

    It depends on your needs. Nobody is saying that the Playbook is useless. But most people do not own a BB, or if they do they plan to migrate off of it soon(its losing customers quarter over quarter consistently now). And without a BB, the Playbook as it stands is a pretty limiting device.

    For someone with a BB, the Playbook is a strong consideration, especially if they intend to keep their BB. But for those of us who do not have a BB, the other 80% of the phone market(I use WP7), a Playbook makes little sense given its limitations. I don't care about a camera on a tablet, my phone does that fine. I do agree that 8GB is limiting, but it is a limit I am willing to live with. If storage was my primary concern I'd have a Nook Tablet since I can use SDHC on it. Also, Amazon has a much more complete app store, plus I can sideload apps from the Google Marketplace as well.

    I'm not saying the Playbook is a big deal. But for those of us without a BB, its a pretty incomplete experience comaparatively.
  • doesitreallymatter - Friday, December 2, 2011 - link

    For a hardware review site I find the conclusion that this is the tablet to get at $199 (as opposed to the playbook) very suspect.

    The biggest problems people seem to have with the playbook is the lack of a native email client, which RIM has stated is coming in Feb. This update in February is supposed to bring android support to the playbook as well, however limited it may be. As this review notes though, the app support appears to be limited for the fire as well.

    So again, why is this tablet preferred over the playbook which has double the memory, front and back cameras and at least twice the storage?

    There is a bias against RIM present in the media and that cannot be denied.

    Not sure why I'm even bothering to post here. People have become more fanatic about their phones than people were back in the days of X gaming console is better than Y gaming console.
  • DukeN - Friday, December 2, 2011 - link

    Thank you for saying it out loud.

    Still waiting for AT's review of a single BB 7 OS device.

    I think I've seen major coverage of every single Android, and iOS updates here on AT. Even Windows phone reviews!

    But not a single BB review. Granted, only 10-20% of smartphone users are RIM users, but that's still MILLIONS of people. And a lot more than what some of these android/WP7 devices will ever get.
  • doobydoo - Thursday, December 8, 2011 - link

    You guys can't, or shouldn't just gloss over such a massive failure like not having a proper integrated email client.

    That's VERY important for a lot of people, and who wants to buy a tablet which they have to wait 3 months until they can use it properly (assuming the update even comes).

    RIM have a bad reputation at the moment for several very good reasons and that's a legitimate factor too - they have all but failed already. People with BB's are moving away, and fast.

    The amazon eco system is far superior and the Playbook is just an incomplete and uncompetitive mess.

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