High Framerates with Vulkan but Stutters?

[Raditz]

Hey, guys. I tried the new Vulkan API since it just released, hoping for maybe improved graphics or slightly higher FPS to brag about, but after switching to the Vulkan API, I appeared to be getting 60 fps but it looked choppy. If course the 60 fps was with V-sync on, so I decided to run DOOM with the Vulkan API V-sync off, and with OpenGL 4.5 V-sync off.

Specs:
CPU: i5-6600k (Overclocked to 4.2ghz)
GPU: EVGA GTX 960 4GB SSC (Overclocked with +50mhz on core clock and +500mhz on memory clock)
RAM: 8GB DDR4 (Don't remember what frequency, but I don't think it matters)
MoBo: ASRock Z170M Extreme4
Case Type: Micro ATX

Settings:
Everything Ultra, 1080p resolution, and AA/Anistropic Filtering maxed out (TSAA 8x, Anistopic 16x).

FPS Readings (Done with the Steam overlay FPS monitor):
OpenGL:
Low: 84 fps
High: 101 fps

Vulkan:
Low: 95 fps
High: 101 fps

Looking at this you can see Vulkan didn't make much difference in FPS, but did somehow despite the FPS readings manage to make my game look choppy. If anyone has any suggestions, that'd be great. And before you ask, my graphics drivers for my card are up to date.

[Harry Manchover]

Know problem, check out the other thread on this issue. My 970 also runs at a high frame rate, but stutters very bad.

[Raditz]

After playing around with settings, I managed to fix this problem. Vulkan for whatever reason doesn't like V-sync at all, so here's how to fix it. For Nvidia users, go to your Nvidia Control Panel and under 3d settings find the program doomx64vk.exe . Once you find it, under v-sync set it to off. Make sure in-game v-sync is off as well. Same goes for AMD. Open the Catalyst Control Center, find doomx64vk.exe under 3d application settings (or whatever it's called, haven't used AMD in a long time, lol), and just make sure v-sync is off there. As long as v-sync is off both in-game and in your control panel, you should be good to go. If you have problems with screen tearing, try the opposite and make sure v-sync is on in-game and in the control panel, and let me know how that works. Nvidia users can also try this with the adaptive v-sync technology.

[fenderjaguar]

Vulcan running in borderless window mode, when you think it's real fullscreen, could easily explain these reports of stuttering

http://steamcommunity.com/app/379720/discussions/0/358417461606572430/

[Raditz]

I'm not running in borderless, I know it's real fullscreen. I already explained that the problem was v-sync.

Originally posted by fenderjaguar:

Vulcan running in borderless window mode, when you think it's real fullscreen, could easily explain these reports of stuttering

http://steamcommunity.com/app/379720/discussions/0/358417461606572430/

[Malker]

Originally posted by Raditz:

Hey, guys. I tried the new Vulkan API since it just released, hoping for maybe improved graphics or slightly higher FPS to brag about, but after switching to the Vulkan API, I appeared to be getting 60 fps but it looked choppy. If course the 60 fps was with V-sync on, so I decided to run DOOM with the Vulkan API V-sync off, and with OpenGL 4.5 V-sync off.

Specs:
CPU: i5-6600k (Overclocked to 4.2ghz)
GPU: EVGA GTX 960 4GB SSC (Overclocked with +50mhz on core clock and +500mhz on memory clock)
RAM: 8GB DDR4 (Don't remember what frequency, but I don't think it matters)
MoBo: ASRock Z170M Extreme4
Case Type: Micro ATX

Settings:
Everything Ultra, 1080p resolution, and AA/Anistropic Filtering maxed out (TSAA 8x, Anistopic 16x).

FPS Readings (Done with the Steam overlay FPS monitor):
OpenGL:
Low: 84 fps
High: 101 fps

Vulkan:
Low: 95 fps
High: 101 fps

Looking at this you can see Vulkan didn't make much difference in FPS, but did somehow despite the FPS readings manage to make my game look choppy. If anyone has any suggestions, that'd be great. And before you ask, my graphics drivers for my card are up to date.

got the same with a 970

[Raditz]

Originally posted by Malker:

Originally posted by Raditz:

Hey, guys. I tried the new Vulkan API since it just released, hoping for maybe improved graphics or slightly higher FPS to brag about, but after switching to the Vulkan API, I appeared to be getting 60 fps but it looked choppy. If course the 60 fps was with V-sync on, so I decided to run DOOM with the Vulkan API V-sync off, and with OpenGL 4.5 V-sync off.

Specs:
CPU: i5-6600k (Overclocked to 4.2ghz)
GPU: EVGA GTX 960 4GB SSC (Overclocked with +50mhz on core clock and +500mhz on memory clock)
RAM: 8GB DDR4 (Don't remember what frequency, but I don't think it matters)
MoBo: ASRock Z170M Extreme4
Case Type: Micro ATX

Settings:
Everything Ultra, 1080p resolution, and AA/Anistropic Filtering maxed out (TSAA 8x, Anistopic 16x).

FPS Readings (Done with the Steam overlay FPS monitor):
OpenGL:
Low: 84 fps
High: 101 fps

Vulkan:
Low: 95 fps
High: 101 fps

Looking at this you can see Vulkan didn't make much difference in FPS, but did somehow despite the FPS readings manage to make my game look choppy. If anyone has any suggestions, that'd be great. And before you ask, my graphics drivers for my card are up to date.

got the same with a 970

Try disabling v-sync in-game and in the Nvidia Control Panel like I explained above.

[fenderjaguar]

Originally posted by Raditz:

I'm not running in borderless, I know it's real fullscreen. I already explained that the problem was v-sync.

Oh, sorry. Yeah, I must've skipped your second post. You seem to know what you're talking about, because you use inspector.

But just to double check, are you absolutely sure it's real fullscreen? You can check it by using the nvidia inspector usage graph with "always on top". I'm sure you alreay know, so I appologise if it seems like I'm trying to teach grandma how to suck eggs

[STARCORE]

gtx 980. game no longer works at all. Crash on start. tried all the fixes in the forum. nowt works . disapointing and a anoyed.

[The Welshman!]

GTX TITAN. high framerates in vulkan, reading 60fps with adaptive vsync turned on in nvcp, and running fullscreen, stutter as well. looks choppy for a couple of seconds every so often yet still reading 60fps. tried all sorts of nvcp tweaks and no fix so far..

[Dagger]

turn it to adaptive V-sync.

[MattTS]

Same problem here. I have the game set to "fullscreen" but it's still only ever in a borderless fullscreen, can alt-tab etc too easily for it to be true fullscreen.

[MuncleUnky]

AMD released a new driver specifically for Doom running Vulkan but it still stutters horribly at the same settings, but runs smooth in Open GL

[Johnny 5]

Originally posted by BassReactor:

AMD released a new driver specifically for Doom running Vulkan but it still stutters horribly at the same settings, but runs smooth in Open GL

I'm not getting any stutter whatsoever with Vulkan and AMD 16.7.2 driver (R9 290X) 1080P Ultra preset.

[chadmagedogdad]

yikes this game cant win can it first crashing issues then denvuo now stutters

[Raditz]

Originally posted by Insertprofilenamehere:

Originally posted by Raditz:

Try disabling v-sync in-game and in the Nvidia Control Panel like I explained above.

Enjoy your screen tearing! What kind of fix is that, yeesh.

I haven't experienced any screen tearing with this setting, but your monitor may be different. Adaptive v-sync also seems to work ok with Vulkan, but there's occasional stutter. Try adaptive if that's really a problem for you.