Fans and Thermals

While Surface RT was passively cooled, Surface Pro features two integrated fans to cool the 17W Core i5-3317U. For most light use cases, those two fans will remain spun down and you can’t hear them. Do any sort of serious multitasking or start using Surface Pro as a real PC instead of a tablet and you’ll quickly hear them spin up. Fan noise is audible but not annoying - it’s very similar to the sound you’d hear out of any ultraportable with a couple of tiny fans spinning up.

In landscape mode with the Type Cover attached, Surface Pro draws in cool air from the sides and exhausts it out of the top of the device. Rotate the device into portrait mode and the fans will switch directions, drawing in cool air from the long edge and exhausting it out of the short edges. The fan direction switch is triggered in tandem with display rotation, so as soon as you see your display rotate you’ll hear the fans change direction.

The two fans do a good job keeping the CPU cool (I saw typical CPU core temperatures between 50C - 60C), but Surface Pro does get warm. I measured a max surface temperature of 41.8C while running 3DMark 11. That’s towards the top of the unit, around where the Core i5 CPU is located. On the edges I measured a max surface temperature of 36.5C. There’s no getting around the fact that Surface Pro gets warm, noticeably more so than the 4th generation iPad. It never gets uncomfortably hot however.

Despite being a tablet, the Core i5-3317U had no issues hitting its max turbo frequency of 2.6GHz. I even saw 2.75GHz for a very short period of time (remember, Intel’s Turbo Boost can exceed max TDP until the silicon gets up to temperature).

Storage and USB 3.0

Surface Pro ships with a micro SDXC slot along the edge of the device. Courtesy of Intel’s HM77 chipset, you also get a full blown 6Gbps SSD and a single USB 3.0 port - both significant upgrades over Surface RT. In my 128GB review sample, Surface Pro features a Micron C400 SSD. Microsoft is sourcing from multiple SSD vendors and claims to be shipping with optimized firmware, but I don’t know what other vendors are in the mix. Update: It looks like the C400 SSD is an mSATA drive, likely similar to the one we reviewed here a while back.

To put this in perspective, the C400 is in the same class of storage device that’s used in Apple’s MacBook Air. Although some ARM based SoCs feature SATA interfaces, pretty much all of them are paired with eMMC based NAND storage solutions that are horribly slow. The fastest sequential transfer rates I’ve managed on the 4th generation iPad are typically on the 20 - 30MB/s range, whereas the C400 in the Surface Pro is good for over 400MB/s in reads and just under 200MB/s in writes.

There’s been a lot of debate over the amount of free space available on Windows RT/8 tablets fresh out of the box. My 128GB review sample was partitioned down to 110GB with roughly 8GB used for the recovery partition. Of that 110GB, 89.5GB was free space that remained. I don’t really view this as false advertising by Microsoft (both Macs and PCs have been sold like this for decades), but you do need to know what you’re getting into here. Given the already high price of these systems and the relatively small price differential between a 64GB Surface Pro and a 128GB model, I’d recommend going for the latter. Microsoft claims something like 29GB of free space remains on the 64GB model - enough for some apps and data, but keep in mind like all solid state storage you don’t want to completely fill up your drive either (this is also true for ARM based tablets like the iPad).

USB 3.0 is equally as impressive on Surface Pro. Using a simple USB 3.0 to SATA adapter I could easily read and write at around 200MB/s. Compare this to the ~20MB/s you get on most ARM based tablets and it’s obvious that this Surface deserves its Pro moniker.

Ultimately Surface Pro’s storage subsystem is a big part of what separates it from the current crop of ARM based tablets. While it’s possible to run productivity workloads on many tablets these days, there’s truly very little that separates what you can do on Surface Pro with what what you can do on a conventional PC.

WiFi Performance

Similar to Surface RT, Surface Pro uses a 2x2 802.11n WiFi controller from Marvell. I believe this is likely the same Marvell Avastar 88W8797 WiFi solution, but connected over USB instead of SDIO.

WiFi performance is appreciably better than on Surface RT, connected to a 5GHz 802.11n network I was able to pull a maximum of 87Mbps compared to 42Mbps on Surface RT. This is competitive with what I’ve seen on other high-end tablets based on ARM architectures, although lower than what I’ve gotten out of a MacBook Air.

WiFi Performance - iPerf

WiFi range is subjectively really good on Surface Pro and a lot better than most ARM based tablets I’ve played with. I ran an iperf test on an iPad 4 and Surface Pro around 100 feet away from an AP through several walls and saw roughly an order of magnitude better performance out of the Surface Pro (8 - 10Mbps vs. 0.95 Mbps).

While peak WiFi performance out of Surface Pro is similar to a high-end tablet, worst case performance is more like a good notebook. Overall I’m pleased with the wireless stack on Surface Pro.

Surface Pro as a Windows 8 Notebook Display: Awesome if Calibrated
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  • WCHS - Wednesday, February 6, 2013 - link

    Sorry Anand, this is not the only solution. The best solution to this question is Ipad Mini + Ultrabook. I hate it when companies try to combine two good things and end up with one bad one. I don't even notice my Mini being in my ultrabook bag. I get both - I get long battery life, ultimate portability, full applications access when I need it, and can even use both at the same time - for the almost the same price as Surface Pro + keyboard.
  • andrewaggb - Wednesday, February 6, 2013 - link

    but you have the downside of your data being split between multiple devices... you download your mail twice, your music twice, whatever it is you work on twice... or you do entirely different things on both so there is no overlap.

    Or you read an email on your tablet because it's more convenient (this happens to me all the time), but you need to respond and you need to type a fair amount and sometimes include files or content that's on your laptop. So you end up switching devices. Maybe it's just me, but this happens to me a lot.

    I'm not sure if surface pro is quite good enough yet, it's unclear to me whether it can drive two external monitors and I'd really rather have 256gb of internal storage. So maybe surface pro 2. I'd happily give up a separate laptop + tablet. Just like I happily gave up mp3 player + phone and often use my camera phone instead of my nice DSLR. Convenience will win in the end.
  • WCHS - Thursday, February 7, 2013 - link

    No, that is the point - you mostly do "different things" on the two devices. Even for the common things - at least they are possible. A Surface Pro will never be an ereader. The other point is that the Ipad Mini has shown that the sweet spot for a handheld tablet is "smaller, especially lighter " than an Ipad 2,3,4 - not heavier. Thats it - the Surface Pro is not "handheld".
  • andrewaggb - Thursday, February 7, 2013 - link

    Could be right. I'm certainly not unhappy with the size or weight of my ipad, but it also rarely leaves my house.

    I could take a 7" tablet with me easily... but I recently bough a galaxy note 2, which is another hybrid device, and I personally quite like it.

    I could see myself liking the surface pro for many of the same reasons I like the note 2. But it sounds like the current surface pro isn't quite there yet.
  • flyingpants1 - Wednesday, February 6, 2013 - link

    I'd like to see a roundup comparing Win8 i5 convertibles, namely the Surface Pro, the Samsung Ativ 700T, the Dell XPS 12 (the one that has a crazy swinging flippy hinge), the Lenovo Yoga 13, the Asus ones, Taichi and the others.

    All of these devices have severe drawbacks.
    The Surface pro is heavy and has no real keyboard or stand. The storage issue is a big joke. Probably the worst option of all.
    The Yoga 13 is large, heavy and the keyboard is exposed.
    The Dell XPS 12 is a slightly smaller Yoga and the keyboard isn't exposed on tablet mode.
    The Ativ 700T is my favourite so far. Too bad it has a poor connection between the screen and dock..

    I think each manufacturer should make a 10", 11", 13" of their tablets. IMHO 13.3" 1080p is more than enough to replace a 15.6".
  • faizoff - Wednesday, February 6, 2013 - link

    "The Surface pro is heavy and has no real keyboard or stand. The storage issue is a big joke. Probably the worst option of all."

    Just curious what is the big joke about storage? It's plainly listed what you're going to get and like any other windows OS you can experiment on your own to maximize space.
  • Doominated - Wednesday, February 6, 2013 - link

    Lol, if you think the Surface Pro has a "storage problem" you should try checking out some Yogapad setups. I've seen as little as 60 gigs partitioned to the C Drive out of the box.

    Sorry to break it to you, but the Surface Pro only has a storage space issue if you have absolutely no clue what you're doing with Windows. It takes all of 10 minutes to get yourself up to almost 100 GB of usable storage. Even more if you buy an mSDXC card.
  • Death666Angel - Wednesday, February 6, 2013 - link

    I liked the review overall. And I hope you make a video review for this as well. :D

    That said, I did notice some oddities.
    First, I find it strange that you compare this so much to ARM based tablets. To me, there is a mountain between those 2 kinds of devices. The comparison to Ultrabooks is much more apt. :)
    Secondly, the way you treat calibrated displays. You state:
    "Given that the majority of users don’t do any color calibration on their PCs, this becomes a real problem for consumer perception if your tablet doesn’t ship with accurate colors by default."
    All I have read on that issue is that our eyes are pretty good at adjusting to different color schemes. So unless you use one device that is calibrated exactly and one that is off, you will not notice a device being "wrong". So for most people, it is a non-issue. Then, you praise Apple for doing the calibration, which is fine because it is an extra service they provide (how much value it is to the standard customer is another matter). But what you don't say is that calibration is not eternal. At least everything I've read on the issue says that you have to calibrate displays every few weeks in order to ensure the continued accuracy of the results. Do tablet/laptop displays operate differently where they don't need recalibration down the road? Because if they do need recalibration, than that whole first calibration is looking much less desirable to me. If I need accurate colors, I have the necessary tools to get it myself. If I don't need it a simple calibration by eye is enough to give me a good result (compare the picture to my PC or TV monitor so that everything looks equal and is easy on the eyes).
    Thirdly, your desire for TB. That is simply a personal taste thing and you make that very clear, so I have nothing to criticize. :D I just wanted to say that I do not look at a TB port when buying my PC stuff. The TB enabled things out there are not for me (too expensive, too useless), it adds cost and energy consumption to devices. So I'm pretty happy that MS isn't supporting it here. Unless it comes integrated in the PCH, I don't want it.

    That's all I wanted to say. :)
  • Death666Angel - Wednesday, February 6, 2013 - link

    Oh, one thing more: Please add metric units to the imperial ones. :)
  • Death666Angel - Wednesday, February 6, 2013 - link

    Damn, forgot something else: I'm really disappointed by the power adapter. I would like to see everything that is in a reasonable power envelope (sub 60W) to use a PSU attached to the plug (for the wall socket) and not half way between the plug for the wall socket and the device plug.

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