Great topic. At the architecture level, it’s worth being precise about what’s actually running where: VBS spins up a lightweight hypervisor (the HV on AMD-V or Intel VT-x) that partitions off a portion of your RAM into a secure, isolated region that even the main OS can’t directly access. HVCI rides on top of this by enforcing that only signed, trusted kernel-mode code executes within that protected boundary—the integrity checks happen inside the trusted computing base rather than in the normal kernel, which is what makes it effective against driver-level injection and memory-spoofing techniques. The catch most people gloss over is that the CPU’s virtualization extensions add an extra layer of address translation (nested paging / EPT/RVI) for any guest that’s virtualized, and when you pin code into that secure pool you’re adding latency to what were previously in-kernel operations. That’s exactly where you see the real-world cost land.
For competitive gaming specifically, my honest take is that you want to benchmark before committing—HVCI with Medium ILF on modern Zen 3/4 and Intel 12th-gen+ hardware usually lands you in the 1-3% range at 1080p, but it can eat 5-10%+ at low resolutions where you’re CPU-bound and frame-time stable. If you’re chasing low-latency competitive play, I’d suggest keeping VBS enabled but testing whether HVCI is
"Nintendo 64 with UltraHDMI mod + EverDrive 64 X7 setup."
