FB Usage in MSI Afterburner not lining up with my VRAM Usage

RRSniper

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Jun 27, 2017
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I have a GTX 1070 and when playing certain games, the FB usage will rise drastically while the VRAM usage stays within reason. An example would be Sniper Elite 3 where FB usage rose to 86% while VRAM usage stayed below 3GB. I read in another thread that FB usage means frame buffer usage. Isn't the VRAM the frame buffer? Is it simply not being reported properly?
 
Solution
The frame buffer is only one (small) part of what's stored in VRAM. So even if the FB grows in size a lot (relatively), it'll only make a small relative difference to total VRAM usage.