Overclocking: Difference between revisions

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! scope="col"|Emulation Overclock

! scope="col"|Overclock levels

|-

|[[Atari Jaguar emulators|Atari Jaguar]]

|13.295 MHz/26.59 MHz

|{{✓}}

|{{na}}

|-

|[[Nintendo Entertainment System emulators|NES]]

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Line 20:

|{{✓}}

|?

|{{na}}

|-

|[[Super Nintendo emulators|SNES]] (Main CPU)

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|{{✓}}

|40-60 Mhz,

|40-60 Mhz

|-

|[[Sega Genesis emulators|Sega Genesis]]

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|200 MHz

|{{✓}}

|{{na}}

|{{✓}}

|220MHZ-240MHz

|-

|[[PlayStation emulators|PlayStation]]

|33.8 MHz

|{{✓}}<ref name="kraut">~~https://www.youtube.com/watch?v=~~HapnSOseDfw</ref>

|{{✓}}<ref name="kraut">See {{YouTubeVideo|HapnSOseDfw|here}}</ref>

|{{✓}}

|66Mhz<ref name="kraut"/>

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|28.6 MHz*

|{{✗}}

|{{Y}}

|-

|{{?}}

|-

|[[Nintendo 64 emulators|Nintendo 64]]

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|{{✓}}

|{{na}}

|-

|[[Nintendo Switch emulators|Switch]]

|1020 MHz (CPU), 768 MHz (GPU), 1600 MHz (RAM)

|{{Y}}

|1785 MHz (CPU), 921 MHz (GPU), 2133 MHz (RAM)

|-

|}

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==MAME==

By default [[MAME]] allows you to change the clock speed of the systems it emulates (including consoles) to anything between 50% to 250% of the original clock speed, the only requirement is that you enable cheats for that game/system.

==Atari Jaguar==

Overclocking is [https://forums.atariage.com/topic/109944-overclocked-jaguar/ possible on real hardware]. [[BigPEmu]] supports the clock scale and Blitter speed changing under speed settings.

==NES==

Overclocking is possible on real hardware, but doing so also speeds up the audio unless you're using a special hardware mod like the HiDefNES which does allow for overclocking without changing the audio pitch<ref name="HiDefNESoverclock">~~https://youtu.be/~~QnQuBN3iYVA~~?t=4m8s~~</ref>.

Overclocking is possible on real hardware, but doing so also speeds up the audio unless you're using a special hardware mod like the HiDefNES which does allow for overclocking without changing the audio pitch<ref name="HiDefNESoverclock">See {{YouTubeVideoTime|QnQuBN3iYVA|248|here}}</ref>.

[[FCEUX]] as of 2.2.3 includes an overclocking option which works by adding additional scanlines to the PPU loop. This method doesn't cause audio distortion. It is found under Config > Timing.

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The first version of the chip, commonly referred to as simply "Super FX", is clocked with a 21 MHz signal, but an internal clock speed divider halves it to 10.5 MHz. Later on, the design was revised to become the Super FX GSU-2; this, unlike the first Super FX chip revision, is able to reach 21 MHz.

The SFX chip can be overclocked on real hardware or emulation with fewer issues than overclocking the CPU. However, tests have shown that overclocking can increase the speed of the game, in addition to increasing the frame rate and removing slowdown.<ref name="Dragon50hztest">~~https://www.youtube.com/watch?v=~~tfNI3HpUt-4</ref>

The SFX chip can be overclocked on real hardware or emulation with fewer issues than overclocking the CPU. However, tests have shown that overclocking can increase the speed of the game, in addition to increasing the frame rate and removing slowdown.<ref name="Dragon50hztest">See {{YouTubeVideo|tfNI3HpUt-4|here}}</ref>

{| class="wikitable" style="text-align:center;"

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On real hardware, overclocking is possible using [http://djky2k3.tripod.com/psx_oc.html this modification].

On emulators, [[Duckstation]] allows you to overclock the CPU up to 1000% or 10x. [https://github.com/SonofUgly/PCSX-Reloaded/releases This modified build] of [[PCSX-Reloaded|PCSX-R]] as well as [http://ngemu.com/threads/pcsxr-pgxp.186369/ this fork] allow for overclocking, though most games will break past 1.5x clock speed. Recent builds of Beetle PSX (the libretro fork of Mednafen's PS1 core) also support overclocking, by way of removing timing penalties instead of increasing clock speed. EPSXe also natively supports overclocking up to 4x. Hydro Thunder benefits a lot from it, running at a constant 30 FPS without any other issues.

On emulators, [[Duckstation]] allows you to overclock the CPU up to 1000% or 10x and also supports CD speed up and seek speed up. [https://github.com/SonofUgly/PCSX-Reloaded/releases This modified build] of [[PCSX-Reloaded|PCSX-R]] as well as [http://ngemu.com/threads/pcsxr-pgxp.186369/ this fork] allow for overclocking, though most games will break past 1.5x clock speed. Recent builds of Beetle PSX (the libretro fork of Mednafen's PS1 core) also support overclocking, by way of removing timing penalties instead of increasing clock speed. EPSXe also natively supports overclocking up to 4x. Hydro Thunder benefits a lot from it, running at a constant 30 FPS without any other issues.

==PS2==

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==Sega Genesis==

The original hardware can be overclocked leading to faster/smoother gameplay.~~<ref>http://www.youtube.com/watch?v=SVrElANZg2M</ref>~~

The original hardware can be overclocked leading to {{YouTubeVideo|SVrElANZg2M|faster/smoother gameplay}}.

Most Genesis emulators don't allow overclocking. The [[Genesis Plus GX]] developer, for instance, says that implementing overclocking is "not easy to add without potentially break other things. <ref>https://code.google.com/p/genplus-gx/issues/detail?id=223</ref>

But recently, Genesis-Plus GX libretro core now supports CPU overclocking by up to 500%. <ref>https://docs.libretro.com/library/genesis_plus_gx/#emulation-hacks</ref>

[http://aamirm.hacking-cult.org/www/regen.html Regen] allows overclocking in the dev build version.<ref>http://segaretro.org/Regen</ref> Games with sprite flicker, like Altered Beast, and games with some slowdown, like Rambo III or Mega Man: The Wily Wars, play perfectly with Regen's "Overclock M68000" setting at 732 (1.5x original speed). The game speed and audio are unaffected by overclocking.

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==Sega Dreamcast==

Its SH-4 CPU can be overclocked from [~~200 MHz~~ https://www.retrorgb.com/easier-dreamcast-overclock-mod.html] to either 220 MHz (which is safer) or [https://www.racketboy.com/retro/overclock-your-dreamcast 240 MHz] (which isn't recommended). Some games which may struggle the original console in heavier scenes (like Soldier of Fortune) or don't run at full speed (like Sega Rally which runs at 55 vblanks/sec instead of 60) will work smoother. ~~It's not known whether some emulators support it but~~ Sega Rally runs at full 60 vblanks/sec in [[Redream]].

Its SH-4 CPU can be overclocked from [https://www.retrorgb.com/easier-dreamcast-overclock-mod.html 200] to either 220 MHz (which is safer) or [https://www.racketboy.com/retro/overclock-your-dreamcast 240 MHz] (which isn't recommended). Some games which may struggle the original console in heavier scenes (like Soldier of Fortune) or don't run at full speed (like Sega Rally which runs at 55 vblanks/sec instead of 60) will work smoother. [[Flycast]] supports overclocking, and Sega Rally runs at full 60 vblanks/sec in [[Redream]].

==3DO==

[[Phoenix (emulator)|Phoenix]] and standalone Windows version of [[4DO]] allows up to 4.0/400% of the original 3DO clock speed, making some low frame rate titles such as [[wikipedia:Doctor_Hauzer|Doctor Hauzer]] and [[wikipedia:Killing_Time_(video_game)|Killing Time]] more playable. Also possible to overclock CPU in [[~~libretro]] version of [[4DO~~]]<ref>https://docs.libretro.com/library/opera/#core-options</ref> in options in core's quick menu after game launch, ~~but only~~ to 2.~~0x speed, that still may seem slow~~.

[[Phoenix (emulator)|Phoenix]] and standalone Windows version of [[4DO]] allows up to 4.0/400% of the original 3DO clock speed, making some low frame rate titles such as [[wikipedia:Doctor_Hauzer|Doctor Hauzer]] and [[wikipedia:Killing_Time_(video_game)|Killing Time]] more playable. Also possible to overclock CPU in [[Opera]]<ref>https://docs.libretro.com/library/opera/#core-options</ref> - a [[libretro]] fork of 4DO (in options in core's quick menu after game launch, up to 4.0/50.00Mhz).

The possibility of this function to break games (like incorrect physic and unplayable speed) is unknown.

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In DSi and 3DS systems, it is possible to run classic DS games at higher clocks by the use of [[nds-bootstrap]]. This hypervisor has the option of running classic DS games in DSi mode, effectively overclocking the CPU from 67MHz to 133MHz. This change can remove slowdowns and improve framerate in some games, but can add instability in several others.

==Xbox==

On real hardware some people change Xbox CPU with Tualatin Pentium III and upgrade RAM to 128MB (just like [[Development Kits]]) for {{YouTubeVideoTime|c66hfqw4SKc|456|low frame rate games like Half-Life 2}}.

For emulators, it's possible to use 128MB RAM and also overclock emulated CPU thanks to this [https://github.com/xemu-project/xemu/pull/1467 pull request] for xemu.

==See also==

* [[Modding consoles/flashcarts]]

==References==

@@ Line 9: / Line 9: @@
 ! scope="col"|Emulation Overclock
 ! scope="col"|Overclock levels
+|-
+|[[Atari Jaguar emulators|Atari Jaguar]]
+|13.295 MHz/26.59 MHz
+|{{✓}}
+|{{✓}}
+|{{na}}
 |-
 |[[Nintendo Entertainment System emulators|NES]]
@@ Line 14: / Line 20: @@
 |{{✓}}
 |{{✓}}
-|?
+|{{na}}
 |-
 |[[Super Nintendo emulators|SNES]] (Main CPU)
@@ Line 32: / Line 38: @@
 |{{✓}}
 |{{✓}}
-|40-60 Mhz,
+|40-60 Mhz
 |-
 |[[Sega Genesis emulators|Sega Genesis]]
@@ Line 43: / Line 49: @@
 |200 MHz
 |{{✓}}
-|{{na}}
+|{{✓}}
 |220MHZ-240MHz
+|-
 |[[PlayStation emulators|PlayStation]]
 |33.8 MHz
-|{{✓}}<ref name="kraut">https://www.youtube.com/watch?v=HapnSOseDfw</ref>
+|{{✓}}<ref name="kraut">See {{YouTubeVideo|HapnSOseDfw|here}}</ref>
 |{{✓}}
 |66Mhz<ref name="kraut"/>
@@ Line 54: / Line 61: @@
 |28.6 MHz*
 |{{✗}}
-|{{✗}}
+|{{Y}}
-|-
+|{{?}}
 |-
 |[[Nintendo 64 emulators|Nintendo 64]]
@@ Line 74: / Line 81: @@
 |{{✓}}
 |{{na}}
+|-
+|[[Nintendo Switch emulators|Switch]]
+|1020 MHz (CPU), 768 MHz (GPU), 1600 MHz (RAM)
+|{{Y}}
+|{{Y}}
+|1785 MHz (CPU), 921 MHz (GPU), 2133 MHz (RAM)
 |-
 |}
@@ Line 80: / Line 93: @@
 ==MAME==
 By default [[MAME]] allows you to change the clock speed of the systems it emulates (including consoles) to anything between 50% to 250% of the original clock speed, the only requirement is that you enable cheats for that game/system.
+==Atari Jaguar==
+Overclocking is [https://forums.atariage.com/topic/109944-overclocked-jaguar/ possible on real hardware]. [[BigPEmu]] supports the clock scale and Blitter speed changing under speed settings.
 ==NES==
-Overclocking is possible on real hardware, but doing so also speeds up the audio unless you're using a special hardware mod like the HiDefNES which does allow for overclocking without changing the audio pitch<ref name="HiDefNESoverclock">https://youtu.be/QnQuBN3iYVA?t=4m8s</ref>.
+Overclocking is possible on real hardware, but doing so also speeds up the audio unless you're using a special hardware mod like the HiDefNES which does allow for overclocking without changing the audio pitch<ref name="HiDefNESoverclock">See {{YouTubeVideoTime|QnQuBN3iYVA|248|here}}</ref>.
 [[FCEUX]] as of 2.2.3 includes an overclocking option which works by adding additional scanlines to the PPU loop. This method doesn't cause audio distortion. It is found under Config > Timing.
@@ Line 110: / Line 126: @@
 The first version of the chip, commonly referred to as simply "Super FX", is clocked with a 21 MHz signal, but an internal clock speed divider halves it to 10.5 MHz. Later on, the design was revised to become the Super FX GSU-2; this, unlike the first Super FX chip revision, is able to reach 21 MHz.
-The SFX chip can be overclocked on real hardware or emulation with fewer issues than overclocking the CPU. However, tests have shown that overclocking can increase the speed of the game, in addition to increasing the frame rate and removing slowdown.<ref name="Dragon50hztest">https://www.youtube.com/watch?v=tfNI3HpUt-4</ref>
+The SFX chip can be overclocked on real hardware or emulation with fewer issues than overclocking the CPU. However, tests have shown that overclocking can increase the speed of the game, in addition to increasing the frame rate and removing slowdown.<ref name="Dragon50hztest">See {{YouTubeVideo|tfNI3HpUt-4|here}}</ref>
 {| class="wikitable" style="text-align:center;"
@@ Line 201: / Line 217: @@
 On real hardware, overclocking is possible using [http://djky2k3.tripod.com/psx_oc.html this modification].
-On emulators, [[Duckstation]] allows you to overclock the CPU up to 1000% or 10x. [https://github.com/SonofUgly/PCSX-Reloaded/releases This modified build] of [[PCSX-Reloaded|PCSX-R]] as well as [http://ngemu.com/threads/pcsxr-pgxp.186369/ this fork] allow for overclocking, though most games will break past 1.5x clock speed. Recent builds of Beetle PSX (the libretro fork of Mednafen's PS1 core) also support overclocking, by way of removing timing penalties instead of increasing clock speed. EPSXe also natively supports overclocking up to 4x. Hydro Thunder benefits a lot from it, running at a constant 30 FPS without any other issues.
+On emulators, [[Duckstation]] allows you to overclock the CPU up to 1000% or 10x and also supports CD speed up and seek speed up. [https://github.com/SonofUgly/PCSX-Reloaded/releases This modified build] of [[PCSX-Reloaded|PCSX-R]] as well as [http://ngemu.com/threads/pcsxr-pgxp.186369/ this fork] allow for overclocking, though most games will break past 1.5x clock speed. Recent builds of Beetle PSX (the libretro fork of Mednafen's PS1 core) also support overclocking, by way of removing timing penalties instead of increasing clock speed. EPSXe also natively supports overclocking up to 4x. Hydro Thunder benefits a lot from it, running at a constant 30 FPS without any other issues.
 ==PS2==
@@ Line 215: / Line 231: @@
 ==Sega Genesis==
-The original hardware can be overclocked leading to faster/smoother gameplay.<ref>http://www.youtube.com/watch?v=SVrElANZg2M</ref>
+The original hardware can be overclocked leading to {{YouTubeVideo|SVrElANZg2M|faster/smoother gameplay}}.
 Most Genesis emulators don't allow overclocking. The [[Genesis Plus GX]] developer, for instance, says that implementing overclocking is "not easy to add without potentially break other things. <ref>https://code.google.com/p/genplus-gx/issues/detail?id=223</ref>
+But recently, Genesis-Plus GX libretro core now supports CPU overclocking by up to 500%. <ref>https://docs.libretro.com/library/genesis_plus_gx/#emulation-hacks</ref>
 [http://aamirm.hacking-cult.org/www/regen.html Regen] allows overclocking in the dev build version.<ref>http://segaretro.org/Regen</ref> Games with sprite flicker, like Altered Beast, and games with some slowdown, like Rambo III or Mega Man: The Wily Wars, play perfectly with Regen's "Overclock M68000" setting at 732 (1.5x original speed). The game speed and audio are unaffected by overclocking.
@@ Line 224: / Line 241: @@
 ==Sega Dreamcast==
-Its SH-4 CPU can be overclocked from [200 MHz https://www.retrorgb.com/easier-dreamcast-overclock-mod.html] to either 220 MHz (which is safer) or [https://www.racketboy.com/retro/overclock-your-dreamcast 240 MHz] (which isn't recommended). Some games which may struggle the original console in heavier scenes (like Soldier of Fortune) or don't run at full speed (like Sega Rally which runs at 55 vblanks/sec instead of 60) will work smoother. It's not known whether some emulators support it but Sega Rally runs at full 60 vblanks/sec in [[Redream]].
+Its SH-4 CPU can be overclocked from [https://www.retrorgb.com/easier-dreamcast-overclock-mod.html 200] to either 220 MHz (which is safer) or [https://www.racketboy.com/retro/overclock-your-dreamcast 240 MHz] (which isn't recommended). Some games which may struggle the original console in heavier scenes (like Soldier of Fortune) or don't run at full speed (like Sega Rally which runs at 55 vblanks/sec instead of 60) will work smoother. [[Flycast]] supports overclocking, and Sega Rally runs at full 60 vblanks/sec in [[Redream]].
 ==3DO==
-[[Phoenix (emulator)|Phoenix]] and standalone Windows version of [[4DO]] allows up to 4.0/400% of the original 3DO clock speed, making some low frame rate titles such as [[wikipedia:Doctor_Hauzer|Doctor Hauzer]] and [[wikipedia:Killing_Time_(video_game)|Killing Time]] more playable. Also possible to overclock CPU in [[libretro]] version of [[4DO]]<ref>https://docs.libretro.com/library/opera/#core-options</ref> in options in core's quick menu after game launch, but only to 2.0x speed, that still may seem slow.
+[[Phoenix (emulator)|Phoenix]] and standalone Windows version of [[4DO]] allows up to 4.0/400% of the original 3DO clock speed, making some low frame rate titles such as [[wikipedia:Doctor_Hauzer|Doctor Hauzer]] and [[wikipedia:Killing_Time_(video_game)|Killing Time]] more playable. Also possible to overclock CPU in [[Opera]]<ref>https://docs.libretro.com/library/opera/#core-options</ref> - a [[libretro]] fork of 4DO (in options in core's quick menu after game launch, up to 4.0/50.00Mhz).
 The possibility of this function to break games (like incorrect physic and unplayable speed) is unknown.
@@ Line 234: / Line 251: @@
 In DSi and 3DS systems, it is possible to run classic DS games at higher clocks by the use of [[nds-bootstrap]]. This hypervisor has the option of running classic DS games in DSi mode, effectively overclocking the CPU from 67MHz to 133MHz. This change can remove slowdowns and improve framerate in some games, but can add instability in several others.
+==Xbox==
+On real hardware some people change Xbox CPU with Tualatin Pentium III and upgrade RAM to 128MB (just like [[Development Kits]]) for {{YouTubeVideoTime|c66hfqw4SKc|456|low frame rate games like Half-Life 2}}.
+For emulators, it's possible to use 128MB RAM and also overclock emulated CPU thanks to this [https://github.com/xemu-project/xemu/pull/1467 pull request] for xemu.
+==See also==
+* [[Modding consoles/flashcarts]]
 ==References==