WiFi Performance

Microsoft made an unusual choice for Surface’s WiFi hardware, it uses a Marvell AVASTAR dual-band MIMO (2x2) 802.11n wireless network controller (88W8797?). Marvell tends to be one of the more cost effective players in the industry which could help explain Microsoft’s choice.

Despite the rarely used silicon, WiFi range on Surface is quite good. Subjectively I was able to hold on to 2.4GHz signals at greater distances than I could on both the 3rd gen iPad, ASUS’ Transformer Pad Infinity and even compared to the VivoTab RT based on some short time I had with the device. Surface also maintains good distances on 5GHz however the performance drop offs are far more significant.

The sweet spot for Surface’s WiFi appears to be around 40 feet away from an AP, with minimal obstructions (doors/walls are fine). Within this range in my testing I was able to maintain speeds of around 20 – 40Mbps. Add another 20 or so feet and you’ll see performance cut in half again.

Although range is good on Surface, at the outer edges of coverage you’re looking at 2 – 4Mbps, which is only really enough for casual web browsing.

The only real downside to Surface’s WiFi performance is its peak performance. I wasn’t able to get beyond 42Mbps when copying files to the device from a local server on the network. It’s possible that I was limited by some file sharing protocol overhead, but without a good suite of network performance tools for Windows RT it was the best I could do for now.

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  • kyuu - Thursday, October 25, 2012 - link

    Apple reviews came a week or more after the product was released, not pre-release. Also, they're doing a separate review of WinRT. Unlike Apple, the OS and hardware do not go hand-in-hand (i.e. there are OEMs), so reviewing the hardware and OS separately makes sense.
  • amdwilliam1985 - Tuesday, October 23, 2012 - link

    Where is the thumbs up button when you needed one.

    It's been a while since I've enjoy Anand's writing(too much Apple lately). Read every single word in this great article. My emotion was like a roller coaster reading through the pages. I was sure I'm going to get one at the beginning of the article. And then reading about the "good enough" screen, the power/battery connector, the HDMI port, I was like, maybe next generation. Then moving on with software integration and office, I have my hopes up again. Finally seeing Atom performance preview and the upcoming core x86, I'm definitely holding my horse/breath.

    Thanks again for an hour of great reading. I'm in NYC, so I'm planning on seeing the surface on the launch day/evening with my girlfriend.
  • thomas-hrb - Tuesday, October 23, 2012 - link

    I wonder what the maximum size MicroSD card the surface can handle. 32/64 GB is a bit small for a device that I would like to replace my laptop with. But if it could take a 64GB MicroSD like http://au.sandisk.com/products/mobile-memory-produ... then that resolves my issues.

    Although I intend to hang on for the pro version, as I have a lot oc x86 software I would like to run.
  • Chris-Simmons - Wednesday, October 24, 2012 - link

    All Surfaces use microSDXC so they can take up to 2TB as per the microSDXC spec. I believe the largest microSDXC card available currently is 128GB but that is only for commercial customers, 64GB is the largest for retail. We are just waiting on larger cards to become available.
  • jibz - Tuesday, October 23, 2012 - link

    Quick question I didn't see answered in the review: how easy is it to use as a multi user device? One thing that has always bothered me with an iPad or any other tablet is that I can't have different accounts for different family members. So if I install GTA, it'll be available for the kids, I don't have my own bookmarks in my browser, etc. How is Surface/Win RT doing from that point of view?
  • WP7Mango - Wednesday, October 24, 2012 - link

    I can give you a detailed answer...

    Firstly, setting up for multiple users is very easy. The main user is the administrator and the administrator can add further users in the Settings page. Once a user is added, then it's just a case of that new user logging in using either a password, a PIN, or a picture password.

    Each user has their own settings, their own apps, their own Start screen layout and background image, their own email accounts, their own contacts in the People hub, their own social network accounts, their own app data, their own bookmarks, etc etc. When one user installs an app, if another user subsequently wants to install the same app then it doesn't get downloaded again - instead, new seperate app settings are created for the new user. So if you are playing a game for example, then your saved games will be seperate from another user's saved games. If you delete a user, only their data is deleted and yours remains intact.

    Bottom line is that multi-user works very well.
  • kyuu - Thursday, October 25, 2012 - link

    Thanks for the detailed answer on that!
  • karasaj - Tuesday, October 23, 2012 - link

    You mentioned that typing speedily on Surface could bring up some heavy CPU usage: do you think that this really hampers Surface's user experience (would it be an issue) or is it merely an example of MS office 2013 nearly taxing Tegra to its limits?

    I.E. when typing speedily did CPU usage go up but it remained smooth, or was there a noticeable slowdown? The only things I can imagine doing with Surface are MS office, netflix (HD video), and youtube/IE. Do you think any of those feel too slow/laggy to be detrimental?
  • VivekGowri - Tuesday, October 23, 2012 - link

    Based on my experience with the VivoTab RT (nearly identical hardware/software - Tegra 3 + Windows RT) it's the latter - I saw weirdly high CPU utilization, but no typing lag. Anand mentioned getting some with the Surface, but nothing too drastic if I remember right.
  • karasaj - Tuesday, October 23, 2012 - link

    Fantastic. I'm not too worried about high cpu usage as long as there's no lag, although it does seem like that establishes a "lower limit" for RT hardware. Do you think this high cpu usage would have a worse effect on battery life than say the wifi browsing battery life test for example? (I feel like no, but cpu usage shouldn't be too too high there)

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