The PC Requirements For Mainstream VR HMDs

A Range Of Specs For A Range Of Applications

It’s funny, but it seems that there are things we instinctively know to be true about PCs that we don’t think about in the XR world. One of the most obvious is the notion that XR users will have a wide variety of needs and use cases, and therefore, there will be a commensurate array of PCs and HMDs to accommodate.

This is the same reason why some people need high-end gaming desktops, some are happy with a $200 Chromebook, and everyone else is everywhere in between. Higher-end PCs cost more and can do more; the same is true of HMDs.

And so, just as Microsoft and Intel have developed a range of specifications for the HMDs, they’ve developed a range of specifications for the PCs that will power them, as well. As we mentioned in an earlier article: “HMDs […] will be used to do all sorts of different computing tasks, from casual computing (such as web browsing) to communications (Skype) to serious productivity (Excel and PowerPoint floating in front of you) to passive entertainment (watching movies) to active entertainment (such as gaming).

Understanding PC Requirements: A Second Axis

The minimum and recommended specifications for the range of XR HMDs are actually not quite straightforward. To really understand it all, you have to think in two dimensions–on both X and Y axes, if you will. We’re looking at what a range of PC hardware can support, but also what a range of HMD hardware demands.

If you wanted to, for example, play a certain game at a certain resolution, you would need to look at just one axis (let’s say the X axis): Weaker PC hardware means you can get less out of the game, whereas high-end PC hardware will deliver an optimal experience.

With these HMDs, you still have that same X axis; as we’ve discussed, people will be using their PC-connected HMDs for tasks as tame as light web browsing, but also applications as intense as AAA gaming. Therefore, weaker PC hardware is still at the far left of the X axis, and the more powerful PC hardware is on the far right.

However, you can think of the range of HMD hardware as a Y axis. At the very bottom of the Y axis, you’ll have a bare-essentials HMD; at the very top, you’ll get an HMD with the most, and best, features.

Therefore, when you think about PC requirements, you have to consider what applications and HMDs will demand.

If you squint, you can see the X/Y axis present in this slide:

On the far left, the XR experiences are pretty tame: You can use Universal Windows Apps within the Holographic shell (which could potentially be fairly amazing, if the experience is strong enough), play casual games, and view 360-degree images and video. That’s about on par with what you get from a Gear VR-level HMD (with the exception of the apps-in-the-shell business).On the far right, though, is where the Y axis comes into play. Starting from the left, Microsoft suggests that you get more bang for your PC hardware buck by adding discrete graphics, a better CPU, more memory, and “higher-end input”–all of which is obvious. According to the slide, at the high end (all the way to the right), you’ll also get to play higher-end games and enjoy “premium content.” But also note that “Premium HMD” is listed there, too.

What Microsoft is trying to say is that in order to get all the best stuff, you need robust PC hardwareand one of the highest-end VR HMDs. Remember, those HMDs are going to come with a wide range of specifications.

Your task as a consumer will be to balance the capabilities of your PC with those of your HMD. For example, don’t expect to get superb VR performance out of your beastly gaming PC with an entry-level $300 VR HMD, nor with your Ultrabook and one of the best VR HMDs.

PC Requirements: Is There A Time Warp?

Here’s a key slide, but even this one isn’t quite as clear as we’d like (we’ll explain in a moment):

This slide lists the minimum PC requirements for both laptops and desktops. We’ve seen the former before, but not the latter. Note that the requirements are identical, save for the CPU–which mainly has to do with form factor (e.g., an Ultrabook-class chip goes in an Ultrabook, not a desktop). But, hey, apparently we’ll be able to get away with running VR off of a Core i3 (Skylake or Kaby Lake) or an AMD FX4350.

But there’s a wrinkle: These are specs that will run this gear as of “Holiday ‘17.” An adjacent slide shows different specs–primarily around the graphics. Gone is the integrated graphics minimum spec; this one says you’ll need a discrete GPU–a GTX 965M (GTX 960 on the desktop) or AMD RX 460 or equivalent. That means Ultrabooks won’t be able to offer what Microsoft considers an XR experience once the Windows 10 Creators Update lands.

Thought of one way, that’s perhaps disappointing given what we were previously told about the minimum PC requirements; but the Creators Update seems like a big deal, so it follows that perhaps the new capabilities demand better hardware.

Except…the Creators Update is scheduled to land in the spring of 2017. That’s many months before the “holidays” of 2017, but the “holiday ‘17” minimum specs are lower than those required by the Creators Update.

To be honest, we do not know what Microsoft is thinking here. Our assumption is that there will perhaps be further stratification based on the operating system: Windows 10 minimum specs and Windows 10 Creators Update minimum specs.

That’s a lot of juggling–you have to balance the PC hardware with the HMD hardware with the version of Windows 10 that you’re running. (Don’t worry folks; we on the Tom’s Hardware editorial team as well as our wonderful forum members will be here to help you sort these things out when the time comes.)

It’s also possible that, in part, the Creators Update specs are mainly intended as guidance for OEMs who are planning to show off these XR capabilities on their systems. The WinHEC crowd consists of a lot of companies that make things–less so developers (which is what events like IDF and Build are for), and even less so journalists–so Microsoft may just have provided those specs to help ensure that OEMs are using sufficient PC hardware to show off their HMDs.

There’s a final bit that Microsoft shared, concerning ways that OEMs can differentiate their PCs for various XR experiences:

Note that the “move to” dual-channel DDR4 RAM is advisable, which means that the minimum specs require just DDR3. Unsurprisingly, SSDs over HDDs are preferable, and it seems that there are plans for Bluetooth “interactive” accessories. That could mean 3DoF or 6DoF hand controllers.It’s refreshing to finally get some answers from Microsoft and Intel about mainstream HMDs and PC requirements for them, but even so, there’s much we do not yet know–and I believe that’s becauseno one yet knows exactly what the market will look like, what people will actually want and use, who will make what, and what it will all cost.

However, make no mistake: If two of the most important personal computing companies in the world believe that XR is the future, it will be, one way or another. And you, the consumer, will help shape it.

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