Sudden change in Vive performance....

Cmdr Menmnu

C
I've been playing ED in VR with my Vive for a while now and been loving it. I spent a while playing with the settings in game, the settings for the Vive and OC'ing by GTX 1070 to find a sweet spot of setting (see https://forums.frontier.co.uk/showthread.php/266026-Performance-Review-GTX1070-FE-Vive). I was happy getting 90FPS with essentially VR high but with SS=0.65 and a Vive render Target Multiplier of 1.5; good performance, good graphics.

I haven't played for a while (real life getting int he way), but I noticed some odd blurring when I was playing the other day as I was moving my head around. Some investigation led me to discover that I am now no longer getting 90FPS but only 45 (my GPU frametime is not, very consistently, 15ms - rather than the previous ~10ms).

What?!?

My first though was that the extra graphical tweaks brought by patch 2.2 had effected things and that maybe I couldn't run with some of the setting on any more, but thats not the issue. When I turn the setting to VR low and turn off everything I can I still get a constant 15ms frametime.

Then I though it might be the 375.86 nvidia drivers (they were having an issue with limiting the memory speed on pascal cards), but I upgraded today to 375.95 (which reportedly fixes this issue) but the performance is identical.

I thought I'd see if anyone else had seen anything like this before I roll my driver back to something older, or see if anyone has any other ideas...


I thought it might be the 375.86 driver
 

Cmdr Menmnu

C
Aha! I found out what the problem was. An update to steam seems to have resulted in the 'allow asynchronous reprojection' and the 'allow interleved reprojection' options being ticked. I had thought these were a good thing, but it turns out that switching them both off has a huge effect on the frametime. With these off I can run with VR ultra settings, SS 0.85 and render target 1.5 and get a comfortable frametime of ~8ms - easily enough to get me 90FPS (and better than I had before oddly, so maybe ED optomised the VR settings a bit).

Much happier now that I have no odd blurring behaviour. Anyone else having smilar issues - I suggest turning these options off.
 

Kapow

Kapow
Cmdr Menmnu said:
Aha! I found out what the problem was. An update to steam seems to have resulted in the 'allow asynchronous reprojection' and the 'allow interleved reprojection' options being ticked. I had thought these were a good thing, but it turns out that switching them both off has a huge effect on the frametime. With these off I can run with VR ultra settings, SS 0.85 and render target 1.5 and get a comfortable frametime of ~8ms - easily enough to get me 90FPS (and better than I had before oddly, so maybe ED optomised the VR settings a bit).

Much happier now that I have no odd blurring behaviour. Anyone else having smilar issues - I suggest turning these options off.
Click to expand...


Running Asynchronous Reprojection with Reprojection always on might bring you even more stability with less noticable FPS drops even if you run higher settings. The main problem you had was having both types of reprojection on (Asynch and Inter) hope this helps commander
 

Cmdr Menmnu

C
Kapow said:
Running Asynchronous Reprojection with Reprojection always on might bring you even more stability with less noticable FPS drops even if you run higher settings. The main problem you had was having both types of reprojection on (Asynch and Inter) hope this helps commander
Click to expand...

Nope, that doesn't help. I tried always on reprojection and I tried each mode separately and if any of these are checked in any combination the performance hit was huge, the frametime rose to >12ms and the FPS dropped to 45 - even in VR Low setting s (which without any of these enabled has a frametime of <7ms). So I'm prettymuch convinced that these options are bad news if your card can push 90FPS to the Vive. Interestingly the interleved reprojection hurt less than the asynchronous reprojection. So basically:

Dropped frames < asynchronous reprojection < interleved reprojection < always on reprojection < no reprojection

Anyway - I'm happy now again :D
 

trigg88

trigg88
Just a heads up to steamvr beta users that may not have noticed that resent update reset and changed file name that the target multiplier edit was applied to , its defaulted back to 1.0
 

dree

dree
I had a look in the steamvr.vrsettings file and it is changed to 1.20000076454786 something... ??
I had it on 1.25
What do we do?

Dree
 
Last edited:

trigg88

trigg88
dree said:
I had a look in the steamvr.vrsettings file and it is changed to 1.20000076454786 something... ??
I had it on 1.25
What do we do?

Dree
Click to expand...

That file got changed with latest release,look for another vr config file in steam, can't give u name as I'm away from my PC just now but it's obvious,the target multiplier line is now there, my edited steamvr.vrsetting file no longer contains my edited target multiplier,it was overwritten
 

vic

V
Cmdr Menmnu said:
Nope, that doesn't help. I tried always on reprojection and I tried each mode separately and if any of these are checked in any combination the performance hit was huge, the frametime rose to >12ms and the FPS dropped to 45 - even in VR Low setting s (which without any of these enabled has a frametime of <7ms). So I'm prettymuch convinced that these options are bad news if your card can push 90FPS to the Vive. Interestingly the interleved reprojection hurt less than the asynchronous reprojection. So basically:

Dropped frames < asynchronous reprojection < interleved reprojection < always on reprojection < no reprojection

Anyway - I'm happy now again :D
Click to expand...

I am using DK2 and get awful color banding and awful halo's. I burrowed a rift and found it has the issue too(but only on one eye). Like this https://twitter.com/HoodrowT/status/737674921334079488. So I'm not splurging on new rift. So wondering do you get this issue on you vive?
 
Last edited:

Ascorbius

Ascorbius
You might want to give this a try. I got my Vive set up nicely. I still have some tweaking to do to make it utterly perfect, but It's pretty damn good right now.

[video=youtube;IeTRkxrg]https://www.youtube.com/watch?v=IeTRkxrg[/video]
 
Last edited by a moderator:

Ian Phillips

Volunteer Moderator
Ian Phillips
Looks like there is something wrong with your link. The format of BBcode is correct, but the video won't play.
 

Ascorbius

Ascorbius
Wow, I fail at this today :D

Third time's a charm. Mods, if this works, please modify my original post so I don't look like such a wally :)
https://youtu.be/IeTRkxrg[video=youtube;IeTRkxrg]https://www.youtube.com/watch?v=IeTRkxrg[/video]
 
Last edited:

Ascorbius

Ascorbius
Hey Ian, looks like it's not me. There's supposed to be a "F C K" - (without spaces) before the "IeTRkxrg" but the forum software seems to be removing it. Sorry for the multi-post.

If you could look into the link then remove the duplicate posts then it'll all be better :)
 
Last edited:
You must log in or register to reply here.
Back
Top Bottom