Yep, but does that make a difference compared to turning it off in Nvidia profile inspector?
I see a few posts mentioning that folks are doing it both ways, so it probably should work.
I can confirm this is true with my 3070ti… this card was behind the door when VRAM was passed out and this makes a difference. Thanks.
Turned in off in TUF BIOS searching on BAR.
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Tried this today and saw very positive results after disabling ReBAR via Nvidia Profile Inspector.
Test scenario is IniBuilds Heathrow 2024 (all scenery settings on + HD textures), gate 508, 12pm, clear skies, in the Fenix A320 — chosen purely for simplicity and consistency.
Specs:
- 5700X3D
- 4070 Super (driver 572.83 + DLSS 310.2.1)
- 32GB RAM
- 3440x1440
DLSS frame generation is enabled, using TAA. Most settings are on high, with TLOD at 50 and OLOD at 100 (adjusted in-flight, but not using MSFS dynamic settings 
). Raytraced shadows were off initially due to their heavy FPS/VRAM impact.
With ReBAR on: ~80 FPS and ~9GB VRAM when stationary with an external view of Terminal 5. Camera panning was juddery. During taxi, FPS could drop to ~50 with VRAM exceeding 10GB, and sometimes even lower for no clear reason.
With ReBAR off: Still ~80 FPS, but VRAM drops to ~7.5GB in the same static view. Panning is much smoother, as is switching between internal and external cameras. During taxi, FPS held ~60 with a max VRAM usage of 8.5GB. I’ve also been able to re-enable raytraced shadows thanks to the headroom gained.
Currently on my second full flight to test further, but very glad I found this thread.
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Yes, I can confirm all this with my 3070ti. I have been using CapFrameX to get a precise memory usage in the card and does not top out until 7.7GB out of 8.0… so the system is using very little … 0.3.
This allows me to run at TLOD 250 until I get close to the terminal at KSFO with the FlightBeam enhancements.
Remember to also turn off Chrome and Mozilla. They are good for 1.1 GB in my hands.
I wonder how much VRAM would be used at KSFO and FlightBeam using a 16GB card. This number would tell us if SU2 is making better VRAM adjustments based upon card capacity.
Anyway, running better for me… Hey I see the new 5060ti is coming out cheap with 16GB… my testing days may be over!
I turned off ReBar, and not only has my VRAM usage decreased, but it’s also helped with stutters in 2024.
My setup is a 9800X3D, 5080, and 64GB of RAM.
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Are you having any VRAM issues with the 5080? Looks like the 5060ti will also have 16GB. I was originally planning on the 5080 but hard to find etc…
I would be interested if you get the chance to see what happens to your VRAM at KSFO the standard ILS approaches are to 28L or R. I have a custom terminal as I am a local but the standard terminal is very complex.
I’m using under 12GB at Flightbeam SFO with ultra settings, SU2, TLOD at 250, and MFG at 3x. With ReBar enabled, usage was around 13.5GB.
