High VRAM usage with RX 6600 on Sequoia 15.5

For the past month, I've been using a Hackintosh (OpenCore) build with the follow specs:

CPU: Intel i7-14700KF

Motherboard: Gigabyte B760M DS3H AX

GPU: Radeon RX 6600 (8GB VRAM)

Monitor: Apple Studio Display

So far, everything has been working well. However I recently noticed that using the Sensei monitoring app (https://cindori.com/sensei) I can see that the GPU VRAM utilization is very high (80-90%+) even when just having a couple of Chrome windows open. When I use iStat Menus, it also shows the VRAM utilization at 99%. I am using the SMCRadeonSensors.kext from ChefKissInc, along with WhateverGreen.kext, and everything else about the GPU seems to be working fine (it idles at ~40C and utilization is mostly <5%).

Has anyone else with an RX 6600 (or other Navi 23 GPU) seen this? Does the VRAM usage being this high indicate a measurement/kext issue, or is this expected when using Hackintosh with a Studio Display?

Thanks!