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 - Tuesday, October 23, 2012 - link

    Agreed, I'd like some clarification on this as well. I certainly hope it's a simple micro-HDMI that can be used with off-the-shelf adapters.
  • ervinshiznit - Tuesday, October 23, 2012 - link

    Anand,

    You mention that you would have liked to have seen the surface with x86. Is Windows RT only compatible with ARM or does it support x86 also? I realize it's just a compilation issue but I was under the impression that only ARM builds of Windows RT would ever be released by Microsoft.
  • MadMan007 - Tuesday, October 23, 2012 - link

    Don't connect the hardware branding name 'Surface' and software. You are correct that WinRT=ARM only. But there will be Microsoft Surface devices using x86 hardware running full Windows 8.

    Will there be a budget Atom-based x86 Surface, in the same form factor as this one? I'm not sure off the top of my head, but that's probably what Anand meant.
  • ervinshiznit - Tuesday, October 23, 2012 - link

    There have only been plans announced for the Surface Pro, which would include a Core i5 and run full Windows 8.

    I bring up the Windows RT=ARM only because Anand brought up the performance issue in the context of MS Office, and he said that he would have liked to see an Atom in the Surface instead of this ARM core. But then it wouldn't be able to run RT. And that would also mean no free Office 2013 since it's not included in full Windows 8
  • Ryan Smith - Tuesday, October 23, 2012 - link

    Whether or not to include Office is basically arbitrary. Microsoft could include it with Surface Pro, as it's entirely up to them..

    The point to take home is not that RT doesn't run on Atom, but rather that Office on Surface is currently unusually sluggish. A SoC with better performance in lightly threaded situations (such as the Atom) would handle Office better based on what we're seeing.
  • Kevin G - Wednesday, October 24, 2012 - link

    Reading through this review and others seems to point the problem at Office being sluggish and not necessarily the Tegra 3. Even on the PC side where far higher performing hardware exists, Office doesn't give the impression of a speed champion. I'd love to see Office compared on the Surface, Surface Pro and a decent laptop. Yeah, the deck would stacked in favor of the laptop winning but it'd be a good reference point for users as well as reviewing the idea of usability on each device. For example, I can see the utility of viewing and making a quick and simple change to an Excel spread sheet on a tablet but for heavy Excel use restricted to an on screen touch keyboard would likely result in levels of frustration that'd have me snapping the tablet in two.
  • kyuu - Thursday, October 25, 2012 - link

    That's the reason for the Touch/Type Covers...
  • ervinshiznit - Tuesday, October 23, 2012 - link

    Anand,

    You say

    Application launch times are another thing entirely. Nearly every application I launched took longer than I would’ve liked on Surface. I can’t tell if this is a hardware issue or a software optimization problem, but application launches on Surface/Windows RT clearly take more time than on an iPad. I timed a few just to put this in perspective:

    And after the : I expected a chart or something but there's nothing there.
  • JumpingJack - Tuesday, October 23, 2012 - link

    I asked the same question, Ryan said they were overwhelmed with the iPad announcement, the 8350 launch, and his... He said Anand will fill in he info a bit later.
  • michal1980 - Wednesday, October 24, 2012 - link

    apple products didn't get short changed reviews... I wonder why.

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