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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  • sviola - Wednesday, October 24, 2012 - link

    Care to source the claim that A6 performs the same as x86 core processors per clock cycle?
  • blandge - Wednesday, October 24, 2012 - link

    "A6 is as fast as Intel per clock cycle. (and yes: I understand that A6 is dual core and intel is quad + clocked much higher. But the fact is that A6 is as fast per clock cycle. ARM will replace X86)"

    This simply isn't true. The A6 scored 908ms on the SunSpider browser benchmark and a 2700k scores about 135ms (Lower is better). That's about 6x better, and SunSpirder is a SINGLE CORE benchmark.
  • Brainling - Wednesday, October 24, 2012 - link

    Are you serious with this about the A6? The A6 is NO WHERE NEAR as fast as full on Intel silicon. It's not even in the same ballpark. Maybe if you're comparing it to Atom?

    An Ivy Bridge full silicon CPU is in another league over the A6. Of course, they aren't meant for the same purpose. Even taking the faster clocks in to account (~4x the clock speed), the Ivy Bridge regularly scores 6-7 times the execution scores of an A6 in synthetics. That's not pure clock speed, that's also a flat better CPU.

    I swear...some of this stuff is just mind blowing. What in the world would have ever made you think an A6 was "clock for clock" as fast as Intel's best offerings? Also, the XBox 360 doesn't use an Intel CPU or an x86 CPU...it's a Motorola PowerPC. Might wanna check your facts next time.
  • Kevin G - Tuesday, October 23, 2012 - link

    A typo: "Microsoft offers Touch Cover in six colors black, white, magenta, cyan and red." Not sure if a color is missing or you meant five (though five pictured).

    Anand, you've been taking the Surface around judging the examples in the article. Any chance it was with you during the iPad mini event? I can image the looks being worse than when you tried to make a call at the iPhone 5 event.

    "Simply typing quickly in Microsoft Word maxes the single threaded performance of Tegra 3’s ARM Cortex A9 cores." It does seem odd that one of Surface's biggest selling points on the software side is a self inflicted wound. Office should be the premiere application for MS to show case, not bloatware that'd deserve to sit in the sloth exhibit at a zoo. Was Office even usable?
  • Ryan Smith - Tuesday, October 23, 2012 - link

    Apparently we can't count today. It is indeed five colors, not six.
  • ssiu - Tuesday, October 23, 2012 - link

    Finally, some objective Windows RT versus Windows 8 Atom tablet performance comparison on the net -- thanks anandtech. Definitely no reason for me to consider Windows RT.
  • Zink - Tuesday, October 23, 2012 - link

    Yep this is silly. The only reason for RT is to let OEM's compete <$500 with Apple and to emulate other walled garden ecosystems.

    Atom should have been launch hardware for a better user experience. Hasn't Apple success shown that UI is #1?
  • dagamer34 - Tuesday, October 23, 2012 - link

    Basically it seems like Microsoft built a rather competent product, and when we see Windows RT tablets with stronger hardware like Tegra 4 or S4 Pro, it should be a great experience.

    Considering this is Microsoft's first hardware computer, they could have done a LOT worse, and there are some things you only learn by actually shipping a product. For a 1st gen release, that's pretty good.
  • shompa - Wednesday, October 24, 2012 - link

    Thats is one of MSFT problem. Since they control the hardware, we wont see the crazy Android/PC hardware wars. How long time for MSFT to write drivers/support Tegra4 or any other fast SoC?

    Just look at Windows Phone. Nokia have the killer "Pure View" and MSFT don't support it.
    (And thats is why Nokia will die with only MSFT support)
  • notanakin - Tuesday, October 23, 2012 - link

    "Microsoft’s talents not as a software developer nor as a parts assembler are what make Surface great here, rather its design and manufacturing intuition."

    Er, so what is it that makes Surface great here? Almost sounds like the less talent you have, the greater the product. (In that case, please contact me for insanely great product designs.)

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