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Author Topic: Building a VR capable system  (Read 645 times)

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wk1q9zpatfx2Topic starter

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Building a VR capable system
« on: 19-October-17, 08:06:38 »

How is building a VR capable system different from a high end gaming rig ?
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Nichrome

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« Reply #1 on: 19-October-17, 13:27:26 »

VR is just marketing. Any system (at least i5 and gtx1060) is VR capable. Anything more powerful than this will result in better VR experience.
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wk1q9zpatfx2Topic starter

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« Reply #2 on: 19-October-17, 17:50:08 »

So an overclocked GTX970 Gaming 4G wouldn't provide enough computing power for VR ?
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Nichrome

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« Reply #3 on: 19-October-17, 18:09:34 »

As far as I know, it is minimum requirement for VR. Depending on game, CPU used etc etc.
Graphics Card: GeForce GTX 970 or AMD Radeon R9 290 or better.
CPU: Intel Core i5 4590 or AMD FX 8350 or greater.
RAM: 4GB or more.
Video port: HDMI 1.4, DisplayPort 1.2, or better.
USB port: 1 USB 2.0 or faster port.
Windows 7 SP1 or newer.
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wk1q9zpatfx2Topic starter

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« Reply #4 on: 20-October-17, 09:30:18 »

To support building a VR capable system, it would be easier to replace the GPU rather than having to replace the motherboard, memory and cabling to upgrade the CPU.

Right now, VR is more of a technology demo.

I'm trying to determine the level of investment necessary to create a system that is capable of running VR games over the next two years without having to compromise gaming quality with reduced settings values.

Would an i7 4790K overclocked to 4.9 GHz provide sufficient CPU processing power without constantly hitting 100% processor utilization ?
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wk1q9zpatfx2Topic starter

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« Reply #5 on: 20-October-17, 09:32:52 »

With today's VR games, what would you notice as a difference when comparing a GTX970 and a GTX1080 GPU ? Slower turn rate, pixelation, shorter horizons, responsiveness, etc. ?
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Marked as best solution by wk1q9zpatfx2 on 21-October-17, 07:23:26

Nichrome

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« Reply #6 on: 20-October-17, 10:43:28 »

Well in fact, the main factor is the GPU. More powerful GPU will mean smoother gameplay, less chance to get below certain FPS that would simply make the gameplay a bit stressful due to lags, stutters etc.
GTX970 is way behind GTX1080. As it's literally minimum recommended, but playable.
Here's a Steam VR test comparison I found:


As you can see, same CPU used, but GPU changes. And that is the biggest game changer.
I think that overclocked i5 with GTX1070 will be more than sufficient.
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jcioffi88

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« Reply #7 on: 24-October-17, 20:30:56 »

I have a gtx 970 100me and even with overclocking, the Steam VR tester says that its just slightly not good enough for VR. Never actually tried it. I would get a 10 series gpu (1060 6gb or better) because they are better optimized for VR. You also want higher than 60 fps for a smoother experience so more a more powerful gpu would be beneficial. I don't think upgrading your CPU mobo and ram would make as big as a difference as getting the best gpu possible unless your cpu is really old. If your system is predominantly for gaming, VR or not, its best to put the most money into your gpu.
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wk1q9zpatfx2Topic starter

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« Reply #8 on: 28-October-17, 18:55:41 »

After watching videos where people talk about having to drop image quality in VR games, the Nvidia GTX900 series doesn't appear to be up to the task.

The GTX 1000 series doesn't appear to be much better given the cost of an a GPU upgrade.

The GTX 1100 series (next year ?) might be the first chipset to allow you running VR games with maximum image quality settings.
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wk1q9zpatfx2Topic starter

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« Reply #9 on: 29-October-17, 07:18:58 »

When choosing a GPU for a VR build, does AMD have any advantage over Nvidia ?
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Nichrome

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« Reply #10 on: 29-October-17, 15:48:53 »

I wouldn't choose AMD at all. Nvidia's GPU were more powerful than AMD's for quite some time now.
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wk1q9zpatfx2Topic starter

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« Reply #11 on: 30-October-17, 05:24:03 »

Thanks for the reply.
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jcioffi88

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« Reply #12 on: 30-October-17, 05:27:21 »

even a vega 64 isnt better than a 1080 and is nowhere close to a 1080 TI. To make matters worse, its next to impossible to find amd cards so the prices are very inflated. They are also power hungry and generate more heat relative to nvidia. i dont see a reason to buy an amd gpu.
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wk1q9zpatfx2Topic starter

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« Reply #13 on: 30-October-17, 05:39:44 »

Thanks for the reply.
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wk1q9zpatfx2Topic starter

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« Reply #14 on: 30-October-17, 05:42:55 »

So when choosing a GPU for a VR build, anything less than an Nvidia GTX1080 wouldn't be a good investment ?
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Nichrome

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« Reply #15 on: 30-October-17, 09:09:03 »

I personally find GTX1070 to be 1080p sufficient in all/most games running at ultra (maxed out) preset. But how it will behave in VR... no clue.
I'd suggest you wait for some discount at some store, and then grab GTX1080 or even GTX1080Ti.
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wk1q9zpatfx2Topic starter

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« Reply #16 on: 30-October-17, 23:31:31 »

Thanks for the reply.
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jcioffi88

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« Reply #17 on: 31-October-17, 21:32:48 »

I would get whatever is available for a good price. gpu's are very overpriced right now. But you will definitely have to replace a 1070 before a 1080. Maybe a 1070 TI would be worth looking into. It depends on what you will be playing majority of the time. If you are playing 1440p most of the time a 1070 would be perfect and it can handle VR in the meantime. If you're trying to play at 144hz, 4k, and mostly VR then a 1080 might be better. A 1070 is a better value but not as great in terms of future proofing.
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wk1q9zpatfx2Topic starter

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« Reply #18 on: 02-November-17, 03:11:28 »

Given the GTX10X0 series have been around for over a year, upgrading to even a base 1070 just to support VR seems foolish.

If one were to make a $450 investment to support future VR games, that purchase would probably occur after the GTX 11X0 series becomes available.

If current users of VR systems are talking of needing GTX1080 level performance just to support optimal game settings, imagine the level of burden placed on the GPU in the next evolution of VR.

Perhaps the GTX11X0 series will have additional VR specific optimizations rather than focusing on upping the GHz ceiling.
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jcioffi88

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« Reply #19 on: 02-November-17, 16:53:01 »

the return on investment is just bad considering the price of the gpus. unfortunately amd gpus suck and theres no pressure on nvidia to release the next gen gpus yet. Im holding off as long as I can before upgrading. I would look at benchmarks for what games you are looking to play and get whatever card you think will be able to play the games you want at the settings you want and then use it for as long as possible.
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wk1q9zpatfx2Topic starter

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« Reply #20 on: 03-November-17, 07:01:55 »

Until the next generation of Nvidia GPUs are released, putting off a GPU upgrade from a GTX970 for VR purposes looks like the best action.
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wk1q9zpatfx2Topic starter

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« Reply #21 on: 03-November-17, 19:05:14 »

When specifying a CPU for a VR build, is there a limit to the number of cores that are used for a VR game ?
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Nichrome

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« Reply #22 on: 03-November-17, 19:10:05 »

Most games use no more than 4 cores. So an i5 is sufficient. And games are mostly graphics intensive anyway.
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jcioffi88

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« Reply #23 on: 03-November-17, 20:29:30 »

A 4790k is still a great cpu for gaming. upgrading would also require a new mobo and ram and new memory is very expensive right now. But 8700k has 6 cores and 12 threads and is much better than other i7 processors even with slightly lower clock speeds.

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wk1q9zpatfx2Topic starter

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« Reply #24 on: 04-November-17, 12:20:23 »

jcioffi88,

   Thanks for finding that video.

   When considering sufficient processing power, at what point does higher FPS no longer matter ? 120, 144 ?
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jcioffi88

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« Reply #25 on: 04-November-17, 18:56:29 »

It all depends on the capabilities of your monitor and what your expectations are in terms of perfomance. You just want the average fps or the lowest frame rate to be above the maximum refresh rate of the monitor. As long as its higher than what you monitor can display then there will be no difference. The lower the fps drops below the refresh rate the worse the picture will be. With my gtx 970 and a 60hz 4k monitor, i can play dota 2 at 4k and games like call of duty and battlefield at 1440p at max settings. Since i get more than 60 fps with this setup theres no reason for me to upgrade
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wk1q9zpatfx2Topic starter

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« Reply #26 on: 05-November-17, 10:08:10 »

jcioffi88,

   Thanks for the reply.
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wk1q9zpatfx2Topic starter

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« Reply #27 on: 06-November-17, 09:16:12 »

Do VR games and applications impose an additional minimum requirement for system or GPU memory ?
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Nichrome

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« Reply #28 on: 06-November-17, 13:11:09 »

Well each application/game has its own minimum requirement. So it depends what you want to use..
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jcioffi88

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« Reply #29 on: 07-November-17, 05:27:12 »

Yea everything is different and some games will even favor one gpu company versus the other. but for VR you probably want to be over 90 fps rather than the traditional 60 fps to make it smoother. at least thats what Jensen Huang said during the gtx 1080 unveiling stream but maybe he was just trying his best to sell people high end gpus.
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wk1q9zpatfx2Topic starter

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« Reply #30 on: 07-November-17, 11:41:11 »

If you were going to build a VR system, would 32 GB be a recommended minimum ?
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Nichrome

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« Reply #31 on: 07-November-17, 14:27:49 »

16GB is fine. But obviously if you can afford 32GB of RAM, then go for it.
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jcioffi88

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« Reply #32 on: 09-November-17, 16:13:25 »

I can't imagine 16 gb not being good enough for anygame, vr or not. If you want to future proof, start off by getting a 2x8gb set of ram chips and see how 16 gb fares. I would be willing to bet you won't come close to using all 16 if you are only gaming. Then if you really want to you can always add another pair when prices drop if you want 32gb. you'll get more performance boost by putting more money towards whats causing the bottleneck on your system i.e the gpu.
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jcioffi88

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« Reply #33 on: 09-November-17, 16:23:29 »

for some perspective, the msi vr one backpacks all have 16 gb of ram. I can't imagine 32gb being a minimum, thats ridiculous for gaming. 16 is still probably more than necessary for majority of games
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wk1q9zpatfx2Topic starter

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« Reply #34 on: 09-November-17, 17:02:39 »

Unless you're doing video or image editing, system memory doesn't seem to get taxed above 16 GB.

If 16 GB is good enough for VR, perhaps the only justification for more memory is a RAM disk application like DIMMdrive.
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