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3D Gaming - GPU or CPU the limiting factor?

Last response: in Graphics & Displays
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November 2, 2011 6:41:12 PM

I am planning to get the Sony HMZ-T1 as my first step into 3D gaming. I was wondering for those of you who already have a 3D setup - which is more important for game performance - the GPU or the CPU?

I ask this because I am holding off on building a new rig until Ivybridge comes out so I'm milking my Core2Duo 3Ghz (o'cd to 3.6) for all it's worth, but I just upgraded to a GTX 560.

Basically what I want to know is: will my computer be able to run The Witcher 2 / Crysis 2 in 3D with my current rig? Would adding another GTX 560 in SLI do the trick? Or is my outdated CPU going to hold me back and make SLI worthless for the time being?

Thanks for your input!

My specs:
Core2Duo E8400 @ 3.6ghz
GTX 560 1GB
4gb ddr2 @ 960mhz
windows 7 ultimate x64
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November 2, 2011 6:48:30 PM

your current CPU is holding you back from having a GTX 560ti SLI set up reach its full potential. Still the E8400 OC to 3.6ghz is still fairly formidable and it will not prevent you from playing any game.
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November 2, 2011 7:34:02 PM

AxemanACL said:
Check out the 3d article Tom's did a few weeks back.

http://www.tomshardware.com/reviews/geforce-3d-vision-h...


Thanks for the link - good article... however it doesn't really speak to my problem. It does state that for great steroscopic play, you should probably consider running SLI 580's... which is a little scary... but that is using a core i5 clocked at 4ghz as the baseline.

I wonder how much of the performance is based on having a good starting base with the CPU. Playing The Witcher 2 - I can achieve almost max settings with a decent framerate (30-45fps) - and it's not my gpu that's maxed out (usually hovering around 50%) it's my cpu - which is always at 95-100%.

I guess I'll just have to check it out. One good thing about the HMZ-T1 is that it's 1280x720 - so that should help with performance since it has a relatively low native resolution.
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November 2, 2011 8:33:48 PM

witcher 2 is pretty CPU intensive, pretty demanding on the GPU side also



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Best solution

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November 2, 2011 9:14:45 PM

well thats an interesting piece of tech...
looks like it uses hdmi to connect to sources and hdmi is a little limited on the bandwidth for 'proper' 3d use, like the stuff on the toms 3d article. What this also means is that it doesn't require as much graphical horsepower to run it properly.

from wiki
"HDMI 1.4a requires that 3D displays support the frame packing 3D format at either 720p50 and 1080p24 or 720p60 and 1080p24, side-by-side horizontal at either 1080i50 or 1080i60, and top-and-bottom at either 720p50 and 1080p24 or 720p60 and 1080p24"

So it would seem that the Head Mounted Display would be perfectly happy with 60 frames (or 50) at 720p, which doesn't sound too demanding...
At what resolution did you get the 30-45fps? Though if you are cpu limited the fps won't change much with decreasing resolution.

edit or is it really effectively 120 frames (or 100), did some more reading on those 3d formats and now I'm confused...
edit hmm apparently in can be either one, depending which fromat it uses.. maybe. lol idk, it's late and i'm getting tired, i'm off to bed...
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November 2, 2011 9:43:22 PM

Kari said:
well thats an interesting piece of tech...
looks like it uses hdmi to connect to sources and hdmi is a little limited on the bandwidth for 'proper' 3d use, like the stuff on the toms 3d article. What this also means is that it doesn't require as much graphical horsepower to run it properly.

from wiki
"HDMI 1.4a requires that 3D displays support the frame packing 3D format at either 720p50 and 1080p24 or 720p60 and 1080p24, side-by-side horizontal at either 1080i50 or 1080i60, and top-and-bottom at either 720p50 and 1080p24 or 720p60 and 1080p24"

So it would seem that the Head Mounted Display would be perfectly happy with 60 frames (or 50) at 720p, which doesn't sound too demanding...
At what resolution did you get the 30-45fps? Though if you are cpu limited the fps won't change much with decreasing resolution.

edit or is it really 120 frames (or 100), did some more reading on those 3d formats and now I'm confused...


You're absolutely right in saying that the fps don't change much based on resolution - I was kinda blown away by that at first. I'm running at 1920x1080 right now... reducing to 1280x720 does not help much and since it's not native to my screen - it doesn't look so hot.

Which is why I'm wondering whether or not SLI will help me much at all. If you're saying that since this headset handles the 3D differently - perhaps SLI won't even be necessary to run it with my current set-up.

Time will tell - hopefully the HMZ-T1 will be available soon - as there are still no confirmed launch dates for the US. Rumors point to Nov. 14th. I'll report back once I get one and have a chance to check it out.
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November 2, 2011 9:46:31 PM

yeah, if you are cpu limited, sli won't help at all.
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November 9, 2011 1:21:26 PM

Best answer selected by verset.
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April 5, 2013 10:46:44 AM

verset said:
I am planning to get the HMD


so did you get the HMD? What's it like?
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