Zadma
November 25, 2025, 4:37pm
8
VRAM usage as it relates to Resizable BAR has been an observation from users going back since the beginning of the year. This is not a regression of change for SU4, just something you may have noticed for the first time in the beta.
TLDR: Game hates ReBar, game is still broken. If you’re maxing out on VRAM, experience stutters, fps dips and have ReBar on, DISABLE IT in your BIOS.
I used the same starting point of a career mission as a testing spot (urban - LIPU airport).
9070 XT
ReBar On - High textures/100 terrain quality (both settings really heavy on VRAM)/1440p TAA - available VRAM is decreasing during gameplay to around 13,2 GB’s. VRAM usage maxing out. Terrible stutter and FPS freezes when moving the camera around. …
Added July 16th. Please note that a driver update removed the need for me to limit rebar size. However I’ll keep my findings in mind if this stutter anomaly ever returns on subsequent driver updates.
TLDR; don’t disable ReBar but reduce the Size Limit setting to reduce stuttering
There are a lot of posts on this sub-forum correctly indicating that by disabling ReBar the sim exhibits less stutters (especially when panning around the cockpit). I had the same stutter issue (RTX4090/9800X3D) but r…
And discussed heavily within this topic as well:
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