New game running too fast after changing clock speeds

Enable the "next gen features" in the games control panel.....it wont go too fast then  

Try enabling V-sync to slow the FPS down

And you want it slower and even downclock your graphics card? Well, most people wants their game to run faster and smoother not the other way around. :?

what do you mean by it runs too fast??? isnt faster = better = smoother game play??

remember and old pc game called DeathTrack? (carmageddon's grandpa) You had to race cars, shoot up the opponents, buy studs, armor etc. for your car. Ran great on 386. I tried it on a Pentium 133 and it was like: race starts.. (I'm pressing the "up" key) to accelerate. 2 seconds pass.... Race complete, I finished last.

if i used cerntain settings in my old p4 mobo the fully optimised settings , when i went into windows it was it if was frame skipping , ie running superfast, like how u can turn frameskipping on in old emu games to spped them up , it was doin that to xp

Wich moron of a programmer still uses the CPU/GPU clock to calculate timings?
Way to go Crystal Dynamics. (Eidos ditched Core Design for TRL)

I may have missed a few details on the old games playing situation, but 1 suggestion you could try for games that don't run right is Windows Compatibility mode.

If you right click the EXE for an application, a Compatibility tab appears, allowing you to revert the OS to a previous version. I know you are talking mostly about hardware, but this could help out just to see if the games are older OS friendly.

I'm a troubleshooter at heart, so I am always thinking of alternative methods and things to try.

Just my 1 cent.  

I can't enable Next Gen features since my card is not SM3 capable and I already turned on Vsync.

And by running too fast, I'm not talking about the FPS. The game literally runs 2x the normal speed but according to FRAPS, my FPS is only around 30-40.

Then why are you posting in the Graphics forum?

If you don't have AMD's dual core optimizer installed it can fix this issue.
http://www.amd.com/us-en/Processors/TechnicalResources/...

Mouse sensitivity..?  

Im running x2 4200 and x1950xt (with dual core optimizer). Whenever i try to play splinter cell double agent (also has next-gen settings) first the game will have weird artifacts, next time i run it everything is 2x faster, (like fast forward on a vcr) unplayable.

Had same problem with cod 1 single player wouldnt work(screwed up ai) and multiplayer worked fine (same case here). I disabled one of the cores with winlauncher xp- (try that) but it didnt work with splinter cell (i think splinter cell and tomb raider might have the same engine)