How Windows Memory Integrity Impacts Gaming and Benchmarks

This article explores the direct impact of Windows Core Isolation Memory Integrity on gaming performance and computer hardware benchmarking. While this built-in security feature provides crucial protection against malware by isolating critical system processes in a virtualized environment, it creates a persistent processing overhead. Consequently, keeping Memory Integrity enabled typically results in lower frame rates during gameplay and reduced scores in synthetic hardware benchmarks, leading many gamers, overclockers, and hardware reviewers to disable the feature to achieve maximum system performance.

What is Memory Integrity?

Memory Integrity, also known as Hypervisor-Protected Code Integrity (HVCI), is a Windows security feature that is part of Virtualization-Based Security (VBS). It uses your processor's hardware virtualization capabilities to create an isolated, secure area of system memory. By running critical Windows security processes inside this virtualized container, the operating system prevents malicious code and compromised drivers from tampering with the system kernel.

The Impact on Gaming Performance

Because Memory Integrity relies on continuous virtualization, every relevant instruction must pass through an extra layer of security verification. This creates a bottleneck between the CPU, system memory, and the graphics card.

  • Average Frame Rates: Gamers can expect an average frame rate reduction of 5% to 15% when Memory Integrity is enabled, depending on the specific game engine.
  • Frame Pacing and 1% Lows: Beyond average FPS, the feature negatively impacts 1% low frame rates. This translates to noticeable micro-stuttering and less consistent frame pacing during intense gaming moments.
  • Resolution Differences: The performance penalty is most obvious at lower resolutions like 1080p, where games are heavily reliant on the CPU. At 4K resolution, where the workload shifts primarily to the GPU, the performance drop caused by Memory Integrity is much less noticeable.
  • Anti-Cheat Conflicts: Some kernel-level anti-cheat software used in competitive multiplayer games can conflict with Memory Integrity, occasionally causing games to crash or fail to launch unless the setting is adjusted.

The Impact on Hardware Benchmarking

For hardware benchmarking, the effects of Memory Integrity are even more pronounced than in standard gaming. Synthetic benchmarks are designed to measure the raw, uninhibited calculation speed of CPUs, RAM, and GPUs.

  • Lower CPU Scores: Benchmarks like Cinebench, Geekbench, and 3DMark Time Spy CPU tests show an immediate drop in scores when VBS and Memory Integrity are active. The hypervisor consumes CPU cycles that would otherwise be dedicated to the benchmark workload.
  • Memory Latency: Memory Integrity increases system RAM latency and reduces memory read and write bandwidth. Benchmarks that specifically test memory speeds, such as AIDA64, will report noticeably worse timings and throughput.
  • Inconsistent Baseline Data: Because Windows 11 enables Memory Integrity by default on clean installations, while upgraded systems may have it turned off, benchmark results between identical PCs can vary wildly. Hardware reviewers universally disable Memory Integrity to ensure accurate, apples-to-apples comparisons across different components.

Why Some Hardware Suffers More Than Others

The severity of the performance loss depends heavily on the age of the computer hardware. Modern processors feature built-in hardware support to handle Virtualization-Based Security more efficiently, known as Mode-Based Execution Control (MBEC) on Intel CPUs and Guest Mode Execute Trap (GMET) on AMD CPUs.

  • Modern CPUs: Intel 11th Generation (and newer) and AMD Ryzen 3000 series (and newer) have full hardware support for these security features, keeping the performance loss mostly in the single-digit percentages.
  • Older CPUs: Processors older than Intel 7th Generation and AMD Zen+ lack this dedicated support. They must emulate the security features via software, which can result in massive performance drops of 20% or more in both games and benchmarks.

Balancing Security and Performance

Microsoft recognizes the performance cost of Core Isolation Memory Integrity and officially advises that gamers can turn the feature off if they prioritize maximum frame rates over maximum security. For users running strictly controlled benchmarking tests or competitive gaming sessions, disabling Memory Integrity—and rebooting the PC—will immediately restore lost hardware performance. However, for everyday computing, leaving the feature enabled provides a strong defense against advanced malware, at the cost of a small fraction of your hardware's peak potential.