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PSP
Overclocking is the process by which the CPU clockspeed is increased. The reason for doing this would be to reduce slowdown in games, or to increase the framerate. However, as this is a hack and not intended by designers, it can result in many issues. Certain systems can have an overclocked CPU with few if any issues, while others can not overclock without major issues.
[[PCSX2]] Also has a speed hack called VU Cycle Stealing, which allows for increased GPU performance at the cost of CPU cycles. It does give incorrect FPS readout.
==PSP==
[[PPSSPP]] allows over/underclocking of the main CPU. Due to Sony underclocking the CPU to 222 MHz then removing the underclock in a later firmware update to allow it to run at 333 MHz<ref>https://en.wikipedia.org/wiki/PlayStation_Portable_hardware#Technical_specifications</ref> (and thus not having games closely tied to clockrate), overclocking the system (and emulating an overclocked system) results to next to no ill effects.
==Neo Geo==
Final burn alpha allows for overclocking of Neo Geo games. MAMEUIFX (aka MAME32FX) also allows for overclocking.<ref>http://mame32fx.altervista.org/home.htm</ref> All Neo Geo should run at full speed when overclocked.
