You may use this value to force RivaTuner to use paged access to MMIO memory ranges to protect itself from unsafely designed memory scanners like PunkBuster anticheat system, which can cause unpredictable results due to unauthorized access to hardware I/O ports mapped memory ranges. Paged mode is only available when ProtectMMIO is set to 0 and this value specify power-of-two page size greater or equal than 4.

[b]Tip:[/b]

This protection increases CPU load when RivaTuner is accessing hardware. Disable it if you're not affected by PunkBuster's memory scanning issues.