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Optimizing Monitors for Sim Racing

• Optimizing Monitors for Sim Racing

LED vs OLED Refresh Rate vs Pixel Response Time

• We've All Been Duped by LED LCD's Input Lag vs OLED for Gaming [Video] HDTVTest (2021) - At 0m36s there is a good demonstration of why even when there's negligible refresh rate and input delay differences, the OLED picture and motion is still significantly clearer and quicker to complete each frame
• LEDs get down to 1ms pixel response time whereas OLEDs get down to 0.1ms, a 10x improvement which results in less "smear" as objects in the image move
• It is very possible for lower pixel response times to provide a better visual experience than higher pixel response time even at much higher refresh rates
  • For example, 0.1ms @60hz OLED could be a better visual experience than 1ms @120hz LED

Example pixel response times from Rtings.com [1] [2]:

• OLED response times are much lower and have more consistency in times
• LED pixel response times can be wildly greater than advertised (Up to 40x advertised times: 40ms vs 1ms) while OLED maintains a narrower margin of variability (~10x or 0.1ms vs 1.1ms deviance)
  • Although this might have to do with the quality of the product: LG C4 is a top end product while the MSI Optix is on the lower end of 'gaming' monitors

• 

  LG C4 OLED @60hz

• 

  LG C4 OLED @144hz (Max)

• 

  MSI Optix G27CQ4 @60hz

• 

  MSI Optix G27CQ4 @165hz (Max)

LED vs OLED Ghosting Example [3]:

Quality OLED can produce clean, artifact-free, ghosting-free frames, every time

Framerate Limiting

• Options:
  • MSI Afterburner's RivaTuner Statistics Server (RTSS)
    • MSI Afterburner works with any make/model of video card
    • Bonus: This options allows you to instantly update the framerate limit while the game is running by alt-tabbing to the RTSS window
  • NVIDIA Control Panel
  • NVIDIA Inspector's Profile Inspector mode
    • Mostly just as an alternative to RTSS/NVCP for older D3D9 games in my experience

Troubleshooting

Intermittent Visual Gridding Artifacting

• My Solution: Disable FreeSync in the monitor settings
  • I wasn't gaining much anyway since I'm able to maintain a stable 90fps in the game I was playing (GTR2)
  • And Windows Triple Buffers windows (I was using GTR2 in borderless window mode) which avoids screen tearing
• My description in Simwiki Discord:
  • You guys ever get this weird 'gridding' visual effect on the monitor screen that comes and goes?
  • It's almost like old school crt overscan but sometimes it looks to me like it's diagonal lines.
  • Sometimes the image is absolutely clean and then this shows up. It's very subtle.
  • Almost like what I imagine a screendoor effect is like (never tried vr to see what it really looks like).
  • It's super fine, like pixel level. Almost looks like a filter overlaid on top of the image.
  • It seems to be at the monitor level because it comes and goes.
  • My monitor is 1440p, freesync, 165hz. I've got GTR2 limited to 90fps. I have it on fastest pixel response time and racing gaming mode. Not sure if any of those variables cause it.
  • Maybe my monitor is just dying?
    • It wasn't. It was FreeSync.