Tried it, no measurable effect for me (isn’t that hardcoded into UE4 anyway)?
Hi again, in case it helps identifying the problem, the user “jumbli” on the Oculus forums mentioned this:
I was having the same problem since installing 0.4.3. For me, changing Nvidia’s setting “VR pre-rendered frames” from the default of 1 to “let the application decide” solved it and allowed other demos run smoother too.
https://forums.oculus.com/viewtopic.php?f=60&t=16181#p218011
Unfortunately i’m on AMD and i don’t think we have an equivalent setting in the Catalyst Control Center…
One change which seemed to have made difference in my case: maxed out all power management settings for performance.
This fixed it for me. Disabling Speed Step and my framerate returned to locked 75hz (as pre 0.4.3 beta runtime).
Running Win 7 Ultimate 64bit w/Aero off.
Hardware: i7-4770K, 16GB Ram, GTX780 Ti.
edit: Also worth noting:
Changed Nvidia’s “VR pre-rendered frames” setting from 1 to “let the application decide”.
2nd edit: ‘Heavier’ demo that used to be 75hz locked before remains (since runtime 0.4.3+) at 37.5hz.
I do however believe there is something to PatimPatams experience in that in anything below 83 fps gets capped to 37.5hz as I just experienced this in one of my heavier demos (UE 4.3.1 oculus fork). Disabling Speed Step might have just given me just a tiny bit more juice enabling my current demo to perform above 83fps (uncapped) so it caps to 75hz.
Well i don’t know why this answer has just been marked as accepted, but like i mentioned a few weeks back (and shown with the captures i uploaded) this didn’t fix it for me.
Direct Mode + Aero OFF + Mirror OFF is the configuration that gave me the best performance pre-0.4.3 which just doesn’t work anymore, and the alternatives (Direct Mode + Aero OFF + Mirror ON / Direct Mode + Aero ON + Mirror OFF / Extended Mode) give me much worse performance in comparison.
Done some more testing with my heavy demo (SpeedStep disabled):
Extended mode, UE 4.6 (official repo), ORv.0.4.3 : ~60fps
Direct mode: UE 4.6 (official repo), ORv.0.4.3 : 37.5fps
Extended Mode, UE 4.6 (official repo), ORv.0.4.4 : ~65-70fps
Direct mode: UE 4.6 (official repo), ORv.0.4.4 : 37.5fps
In general it seems like the requirements for UE4 has gone slightly up since 0.4.3.1 (using ORv0.4.1) where my heavy demo was running 75fps locked in Direct Mode. Using dynamic lighting, not static baked.
,0.4.4 should be a bit better with 37.5 issue, but it is still happening. The only way to avoid this is to make sure that the game can make 75 + fps in every spot of it. The lockdown occurs when the game can’t achieve 75 fps.