[BUG] Reproducible Performance Bug

[incontrovertible]

Running Warframe near the smoke effects commonly found in Vallis caves (but probably elsewhere as well) my framerate becomes like a wave as the GPU core clock cannot maintain frequency going down by as much as half then rising and so on. This is easily reproducible with DX10 on and basically any graphics setting toggled on, eg Volumetric Lighting, DX9 is completely unaffected with everything turned on. The following is only pictures but it is very easily reproducible and can do video if really needed.

Example cave in DX9 on High runs fine

Same cave in DX10+11 on High GPU frequency, thus framerate, is like a wave


Same cave in DX10+11 on High all toggles off, performance is normal


Easily reproducible cave location


inco-PC
CPU Intel Ivy Bridge i7 3770k
GPU MSI RX 480 GAMING X 8G
PPU ASUS GT1030-SL-2G-BRK (disabled)
RAM 16GB DDR3 G.Skill TridentX

Cheers for looking, I'm really enjoying Fortuna and looking forward to future updates =]

Edited November 13, 2018 by incontrovertible

[incontrovertible]

I had to format and install Win10 this morning due to an unrelated issue but this performance bug still persists and is still very easily reproducible. Volumetric Lighting is the worst offending toggle but most of them do it to some degree, that is unable to maintain top core clock.

[incontrovertible]

I've tried the following so far (that I can remember at this moment):

• Anisotropic Filtering off
• Display Driver Uninstaller in Safe Mode multiple times
• Radeon Software 18.9.3 and 18.11.2 /w DDU cleans
• Disabled GT 1030 secondary GPU's screen in Windows Display Settings
• Disabled GT 1030 in Device Manager
• Removed GT 1030 physically from PCIE /w DDU clean after
• Various Radeon Software settings
• Various GPU Utilities, ie Afterburner, TriXXX, etc
• Increased Power Limit and Voltage
• Set State 5-7 at same clock/voltage in WattMan
• Mild Core/Memory overclock
• FreeSync on/off, Range 48-74Hz
• VSync/Enhanced Sync
• 60Hz/75Hz

All of the above has not solved the issue, it is very obvious with Volumetric Lighting on in particular (use Dynamic Resolution for even more obviousness) but other toggles exhibit this behavior as well. At the moment the only toggle I have on is Character Shadows, it is not affected and is nice. I don't need these settings I have just noticed they are causing real issues. There is so far one fix which is to cap the framerate, any higher than 72 using the in-game limiter will resume exhibiting the issue however.

Cheers for looking, I'm really enjoying Fortuna and looking forward to future updates =]

Edited November 24, 2018 by incontrovertible

[incontrovertible]

I still cannot for the life of me troubleshoot this issue, here is a video of it where I toggle Radeon Chill on/off as a 70 FPS frame cap. This shows that as long as the framerate isn't too high the GPU core clock and therefore the game runs fine.
 

 

[incontrovertible]

I have managed to pin this bug down but haven't got a fix at the moment. My RX 480 is throttling due to some sort of 60 degree or 150 watt limit meaning it happens in other games too. I guess the offending effects use more power/generate more heat. I might have to RMA, still got some stuff left to test.