Mi procesador es dual core, y ademas te pego la respuesta completa de codemasters, para que entiendas un poco mejor si cabe lo que te explique anteriormente:
[CUOTE]Thank you for submitting your recent request to Codemasters Customer Services
concerning Colin McRae Rally 2005.
Problem
Problems are experienced when trying to run games using an AMD Athlon 64 dual
core CPU. The symptoms are usually that the game runs too quickly.
Solution
Unfortunately we can only guarantee that games will function when using a
processor listed on the game's box. However you might like to try the following
solution. Please note, however, that we are unable to offer support for this
procedure and if it is unsuccessful, you will need to play the game using a
supported CPU.
1) Start the game
2) Press ctrl - alt - delete
3) Select 'Task Manager'
4) Click on the 'Processes' tab
5) Right click on the game's exe file and choose 'Set Affinity'
6) You should now see two ticked boxes: CPU0 and CPU1. Untick CPU1, so that only
one box is ticked
7) Select OK and close the Task Manager.
The game should now run normally.
If you need further assistance, please reply to this email and INCLUDE THIS LINE
IN YOUR REPLY:-
[/CUOTE]