View source for List of CPU speed sensitive games

This is a list of games that do not run properly in some ways on CPUs faster than what was common than at the game's release. 1990+ for the most part, since before that, this was more often the case than not: As a general rule, games for IBM XT computers require a 8088 4.77 MHz to play right.

Some CPUs, for example AMD K6-2 and earlier Pentium IIs have selectable multipliers, which may help with achieving the lower speeds recommended for some of the games in this article. Additionally, disabling L1/L2 caches will slow down the processor as well, e.g. a Pentium III with disabled caches will be comparable to a 386.  [http://www.vogons.org/viewtopic.php?t=38613 Setmul] is a software utility by forum member gerwin that allows multipliers and caches to be changed/disabled and enabled without a reboot.  For certain P54C Pentiums, it also allows manipulating Test Register options for further speed control.

Also, it is possible to use a slow 3D card to slow some of the games down, especially with the early proprietary APIs; a special case here are Rendition Vérité cards, since their slow VGA performance will also bottleneck DOS games using these modes. Finally, as a last resort one may try slowdown utilities such as [http://www.cpukiller.com/ CPU Killer] and [http://www.hpaa.com/moslo/ Mo'Slo].

For games with unlisted CPU specs refer to the requirements published by the developers.

== DOS ==

{| class="wikitable"
|-
! Game title !! Symptoms with faster CPUs !! Maximum suitable CPU !! Fix available? 
|-
| Aces of the Pacific (1992) || Slippery flight controls || 486 25 || Reduce clock speed or disable cache with [http://www.vogons.org/viewtopic.php?t=38613 Setmul] 
|-
| Alien Carnage (1993) || Runtime 200 error || P233MMX; K6-2/III 500MHz;  M II-433GP || Run TPPATCH on every .exe file, including harry*.-0 (except harry.-0), which are also .exe files for Pentium Pro 180 and faster; Pentium MMX 266; all PII and Celeron; K6-2/III faster than 500MHz and all Athlon
|-
| Alien Trilogy (1996) || Runs too fast on higher P3s || ? ||
|-
| rowspan="2" |Alone in the Dark (1992) || Animations too fast || 386DX 33 || Reduce clock speed or disable cache with [http://www.vogons.org/viewtopic.php?t=38613 Setmul]
|-
| Direction keys need to be tapped extremely fast to run ||  || AITDRUN: https://www.vogons.org/viewtopic.php?f=7&t=37118#p326838
|-
| Arctic Adventure (1991) || Gives runtime error on P100 || ? || Reduce clock speed or disable cache with [http://www.vogons.org/viewtopic.php?t=38613 Setmul]
|-
| Betrayal at Krondor (1993) || glitching MIDI music / game freezes on startup || 486 25 (SB); 486 16 (GM) || Reduce clock speed or disable cache with [http://www.vogons.org/viewtopic.php?t=38613 Setmul]
|-
| Bubble Ghost (1987) || Runs too fast/slow || 386SX 16 ||
|-
| Carmageddon (1997) || Runs too fast || ? ||
|- 
| Day of the Tentacle (1993) || garbled Adlib music || 486 16 || Reduce clock speed or disable cache with [http://www.vogons.org/viewtopic.php?t=38613 Setmul] 
|-
| Descent (1994) || Runs too fast with ~higher PIIs || P233 || Increase resolution 
|-
| Descent II (1996) || Normal game speed, but mouse sensitivity drops down on high framerates || P2 300? || 
|-
| Double Dragon (1988) || Locks up before final battle and player 2 will have fewer moves || 8088 4.77 || 
|-
| Duke Nukem II (1993) || With certain sound cards, Sound Blaster digitized sounds might not play || 486 16 || Reduce clock speed or disable cache with [http://www.vogons.org/viewtopic.php?t=38613 Setmul]
|-
| Dune (1992) || no speech || P2 333 || 
|-
| Dyna Blaster (1992) || locks up || 486 50 || 
|-
| Game Wizard 32 Pro 3.0 (cheat tool) || locks up || P3 500 ||
|-
| Halloween Harry (1993) ||colspan=3| ''See Alien Carnage''
|-
| Hard Drivin' (1990) || Music is ear-piercing and game runs too fast overall on P100 || ? || Reduce clock speed or disable cache with [http://www.vogons.org/viewtopic.php?t=38613 Setmul]
|-
| Hi-Octane (1996) || Speed problems || P100 || 
|-
| Indiana Jones and the Fate of Atlantis (1993) || garbled Adlib music || 486 16 || Reduce clock speed or disable cache with [http://www.vogons.org/viewtopic.php?t=38613 Setmul]
|-
| Indiana Jones and the Last Crusade (1989) || With Adlib sound "Runtime error R6003 - integer divide by zero" when using a Sound Blaster 16 card with a 486 or faster computers || 386DX 40 (SB16); 486DX 25 || For the the 256 color VGA version: [https://web.archive.org/web/20121107040406/http://www.lucasarts.com/support/update/indy-last.html "486 Upgrade" patch]. For 16 color EGA version, on older CPUs with integrated L1 cache you can turn off the L1 cache to avoid the problem. 
|-
| Jazz Jackrabbit (1994) || Runtime error 200 || P233MMX; K6-2/III 500MHz;  M II-433GP || [http://www.jazz2online.com/downloads/341/jazz-1-tppatch/ TPPATCH] for Pentium Pro 180 and faster; Pentium MMX 266; all PII and Celeron; K6-2/III faster than 500MHz and all Athlon or reduce clock speed or disable cache with [http://www.vogons.org/viewtopic.php?t=38613 Setmul]
|-
| King's Quest VII: The Princeless Bride (1994) || Speed bug with one or two puzzles || ? || 
|-
| Knights of the Sky (1990) || Runs too fast || 386SX 20 || Reduce clock speed or disable cache with [http://www.vogons.org/viewtopic.php?t=38613 Setmul] 
|-
| Lemmings 2: The Tribes (1993) || Requires HDD smaller than 504 MB (CHS limit) or else the copy protection checksum calculated by the installer is wrong || ? ||
|-
| Lotus III: The Ultimate Challenge (1992) || Crashes with invalid opcode error || P2 350 || 
|-
| MegaRace (1993) || Speed powerups make your car speed up way too fast || P100? || Use a slower CD-ROM drive.  The speed powerups speed up the car as fast as your CPU and CD drive can handle, so using a slower drive can help.
|-
| Micro Machines 2: Turbo Tournament (1996) || ? || ? || 
|- 
| Might & Magic III (1991) || Animations too fast || 486 16 || Reduce clock speed or disable cache with [http://www.vogons.org/viewtopic.php?t=38613 Setmul] 
|-
| Might & Magic: World of Xeen (1994) || Flashing mouse cursor when hovering over game window, map, and char page || 486 40 || Reduce clock speed or disable cache with [http://www.vogons.org/viewtopic.php?t=38613 Setmul] 
|-
| One Must Fall 2097 (1994) || Runs too fast || 486 66 || Reduce clock speed or disable cache with [http://www.vogons.org/viewtopic.php?t=38613 Setmul]
|-
| Pharaoh's Tomb (1990) || Gives runtime error on P100 || ? || Reduce clock speed or disable cache with [http://www.vogons.org/viewtopic.php?t=38613 Setmul]
|-
| Quarantine (1994) || Runs too fast on P3 || 486 33 ? || Use [http://bretjohnson.us Slowdown], reduce clock speed or disable cache 
|-
| Quest for Glory III (1992) || Garbled General MIDI || 486 16 || Reduce clock speed or disable cache with [http://www.vogons.org/viewtopic.php?t=38613 Setmul]
|-
| Red Baron (1990) || Joystick won't detect on Pentium MMX || P133 || Reduce clock speed or disable cache with [http://www.vogons.org/viewtopic.php?t=38613 Setmul] 
|-
| rowspan="2" |Secret of Monkey Island, The (1990) || With Adlib sound "Runtime error R6003 - integer divide by zero" when using a Sound Blaster 16 card with a 486 or faster computers || 386DX 40 (SB16); 486DX 25 || For the the 256 color VGA version: [https://web.archive.org/web/20130725051109/http://www.lucasarts.com:80/support/update/monkey-1.html#486%20Upgrade "486 Upgrade" patch]. For 16 color EGA version, on older CPUs with integrated L1 cache you can turn off the L1 cache to avoid the problem. 
|-
| Garbled MT-32 music with fast CPUs || ? ||
|-
| Sid Meier's Colonization (1994) || Crashes with Integer Divide by Zero error with Pentium 200MMX || P166 || Reduce clock speed or disable cache with [http://www.vogons.org/viewtopic.php?t=38613 Setmul] 
|-
| Sierra games || no sound card detection || P200 || 
|- 
| Space Quest IV: Roger Wilco and The Time Rippers (1991) || Bugs every time a sequel police is on the screen || 386? || 
|-
| Space Quest V: Roger Wilco - The Next Mutation (1993) || unable to initialize audio hardware || 486 25 (SB); 486 16 (GM) || Reduce clock speed or disable cache with [http://www.vogons.org/viewtopic.php?t=38613 Setmul]
|-
| Star Control (1990) || FM sound malfunction || P150 || 
|-
| Star Control II (1992) || ? || ? || 
|-
| Super C (1990) || OPL2 audio is extremely corrupted on P100 || 386? || Reduce clock speed or disable cache with [http://www.vogons.org/viewtopic.php?t=38613 Setmul]
|-
| Syndicate (1993) || crashes at startup || P166 || 
|-
| Terminator: Future Shock (1995) || too fast on high P2 || ? || SkyNET version 
|-
| Test Drive III (1990) || Runs too fast || 386DX 25 || Reduce clock speed or disable cache with [http://www.vogons.org/viewtopic.php?t=38613 Setmul]
|-
| Theme Park (1994) || Runs too fast || 486 66? || 
|-
| Thor's Hammer: The Trilogy (1995) || Inconsistent in-game speeds (turning around and opening doors very slow) || P3 600 || reduce clock speed or disable CPU cache 
|-
| Toonstruck (1996) || Speed bug with one or two puzzles || ? || 
|-
| Ultima Underworld (1992) || Keyboard movement too fast on fast Pentiums || 486 66 || Reduce clock speed or disable cache with [http://www.vogons.org/viewtopic.php?t=38613 Setmul] 
|-
| Ultima Underworld II (1993) || Keyboard movement too fast on fast Pentiums || P60 || Reduce clock speed or disable cache with [http://www.vogons.org/viewtopic.php?t=38613 Setmul] 
|-
| Ultima VI (1990) || Runs too fast, music distortion || 386DX 25 || Reduce clock speed or disable cache with [http://www.vogons.org/viewtopic.php?t=38613 Setmul] 
|-
| Ultima VII: The Black Gate (1992) || Runs too fast || 486 33 [http://nerdlypleasures.blogspot.com/2013/06/ultima-vii-on-real-hardware.html] || Reduce clock speed or disable cache with [http://www.vogons.org/viewtopic.php?t=38613 Setmul] 
|-
| Vette (1989) || Sometimes doesn't start on a P100 and if it does run controls are too sensitive || ? || Reduce clock speed or disable cache with [http://www.vogons.org/viewtopic.php?t=38613 Setmul]
|-
| Warcraft: Orcs & Humans (1994) || scrolls too fast, water animation too fast, but playable || 386DX 33 || 
|-
| Warcraft II: Tides of Darkness (1995) || Scrolls too fast with PII, but playable || P133? || Battle.net Windows version works fine 
|-
| Warlords II Deluxe (1995) || Crashes on startup with fast CPUs || 486 66 || 
|-
| Wing Commander (1990) || Runs too fast || 386DX 33 || Reduce clock speed or disable cache with [http://www.vogons.org/viewtopic.php?t=38613 Setmul] 
|-
| Wizardry VI: Bane of the Cosmic Forge (1990) || Runs too fast || 386DX 33 || Reduce clock speed or disable cache with [http://www.vogons.org/viewtopic.php?t=38613 Setmul]
|-
| Wizardry VII: Crusaders of the Dark Savant (1992) || "Divide Overflow Flaw/Reboot" on Pentium processors || 5x86; Nx586 || [http://www.zimlab.com/wizardry/patches.htm Pentium reboot patch] for all Pentium, 5K86, 6x86 and laters
|-
| Worlds of Ultima: Martian Dreams (1991) || Runs too fast || 386DX 25 || Reduce clock speed or disable cache with [http://www.vogons.org/viewtopic.php?t=38613 Setmul] 
|-
| Worlds of Ultima: Savage Empire (1990) || Runs too fast || 386DX 25 || Reduce clock speed or disable cache with [http://www.vogons.org/viewtopic.php?t=38613 Setmul] 
|-
| X-Com UFO Defense (1994) || Scrolls too fast/ Shots fired very fast, Still very Playable || P90 || Adjust fire/scroll speed to your liking, not always effective 
|-
| Zool (1992) || ? || ? || 
|-
|}

== Windows ==

{| class="wikitable"
|-
! Game title !! Symptoms with faster CPUs !! Recommended CPUs !! Fix available?
|-
| Al Unser Jr. Arcade Racing (1995) || Runs too fast || P166? ||
|-
| Betrayal In Antara (1997) || Day/Night transitions + movement too fast || P233 || GOG.com version works fine
|-
| Cossacks: European Wars (2001) || Runs too fast in multiplayer? || ? ||
|-
| FIFA Football 2002 (2001) || Crashes to desktop || P4 2.0 ||
|-
| Gex: Enter the Gecko (1998) || Lack of framerate limiter may cause the game to play too fast in certain situations || ? ||
|-
| Grand Prix Legends (1998) || Runs too fast || P4 1.7 GHz || [http://www.vroc.net/papy.com/gpl/download.html#1.2 CPU patch for version 1.2]
|-
| Havoc (1995) || Too fast on late PII || P2 300? || 
|-
| Hexplore (1998) || Crashes after a minute on fast P4 and above || P3 500? || [http://www.mediafire.com/?0291qrmgkdbzv6v# Fix for Modern Systems]
|-
| Imperialism (1997) || World map scrolls too fast || plays fine with patch || Patch 1.1 (slight scrolling delay added)
|-
| Interstate '76 (1997) || Broken physics? || ? ||
|-
| Jane's US Navy Fighters 97 (1996) || Runs too fast || ? || Increase resolution; Jane's Fighters Anthology version works fine
|-
| Jeopardy (1994) || Question timer is too fast || ? || 
|-
| Master of Orion II (1996) || Battle screen scrolls too fast, minor issue || P166? ||
|-
| Monaco GP Racing Simulation 2 (1999) || Runs too fast || P4 2.0 ||
|-
| No. 11 Downing Street: Ninja Nanny & Sherrloch Sheltie (1993) || Animations play too fast in cartoon quality mode || P100? ||
|-
| Pro Rally 2001 (2000) || hangs || P4 2.0 || Install with [http://ubisoft-en.custhelp.com/ci/fattach/get/267/0/session/L2F2LzEvdGltZS8xMzYwNTI0MjI5L3NpZC9fNGlPUXdpbA==/filename/PRSetup-IV.zip], update to 1.1, [http://www.zeus-software.com/files/nglide/prorally2001_patch.zip], may not work with AMD FX CPUs
|-
| Sega Rally Championship (1997) || Direct3D version plays too fast || ? ||
|-
| Silver (1999) || Timing issues with a certain bell puzzle on high P4 || P3 1.0 || GOG.com version works fine
|-
| SimCity 2000 (1995) || African Swallow mode runs as fast as the processor is capable of running, which on fast post-1990s processors can be way too fast || ? ||
|-
| SimCopter (1996) || Runs too fast/glitchy and crashes on P4 3.2 GHz/98SE || K6-2 350 || Use DXWnd to lower the framerate so that the speed is normal and prevent crashes.
|-
| Speed Busters (1999) || crashes || P4 2.0 || GOG.com version works fine
|-
| Star Trek: Deep Space Nine: The Fallen (2000) || CPU throttling issues || ? || Use Direct3D renderer
|-
| Star Trek Generations (1997) || Runs too fast || ? ||
|-
| Star Trek: The Next Generation: Klingon Honor Guard (1998) || Crashes to desktop in the "Advanced Options" menu, CPU throttling issues || ? ||
|-
| Streets of SimCity (1997) || ? || ? ||
|-
| TNN Outdoors Pro Hunter (1998) || ? || ? ||
|-
| Unreal (1998) || erratic speed-up/slow-down || ? || See 3rd post [https://forums.beyondunreal.com/threads/ut-goty-and-framerates-speed-up.182599/ here], and [http://coding.hanfling.de/launch/ this launcher.]
|-
| [[Unreal Tournament]] (1999) || CPU throttling, erratic speed-up/slow-down || ? || See main article for details.  Also read [https://forums.beyondunreal.com/threads/ut-goty-and-framerates-speed-up.182599/ here] and [http://coding.hanfling.de/launch/ here.]
|-
| Wipeout 2097/Wipeout XL (1997) || Runs too fast || ? || supposedly available
|-
|}

== Related links ==
*[http://vogons.zetafleet.com/viewtopic.php?t=34869 VOGONS thread on the subject]