Here is the full list of all 15 CPUCores :: Maximize Your FPS achievements.
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You've used CPUCores to boost your FPS for this many hours: 25
You've used CPUCores to boost your FPS for this many hours: 50
You've used CPUCores to boost your FPS for this many hours: 100
You've used CPUCores to boost your FPS for this many hours: 250
You've used CPUCores to boost your FPS for this many hours: 500
You've used CPUCores to boost your FPS for this many hours: 1000
You've used CPUCores to boost your FPS for this many hours: 2000