J'sais pas si ça t'aideras, from
http://forum.worldoftanks.eu/index.p...pack-and-more/
"For processors with 2 or more cores set the game to use the core not being used for system processes. Done through the Task Manager. Effect and reason the same as the above recommendation. To accomplish this, when you have the game running, go into the task manager(CTRL+ALT+DEL for XP, CTRL+SHIFT+ESC for Win7) and right click on the WorldofTanks.exe choose "Set Affinity..." Uncheck CPU0 to leave it for system processes. May have different effects depending on the system."