Witouth aspm Intel Core i5 520M testing with a Apple Mac-F22586C8 and NVIDIA GeForce GT 330M 256MB on Ubuntu 10.10 via the Phoronix Test Suite. Test without aspm force on boot: Processor: Intel Core i5 520M @ 2.40GHz (4 Cores), Motherboard: Apple Mac-F22586C8, Chipset: Intel Core DRAM, Memory: 4096MB, Disk: 320GB Seagate ST9320325ASG, Graphics: NVIDIA GeForce GT 330M 256MB (500/790MHz), Audio: Cirrus Logic CS4206, Network: Broadcom NetXtreme BCM5764M Gigabit PCIe + Broadcom BCM43224 802.11a/b/g/n OS: Ubuntu 10.10, Kernel: 2.6.39.1 (x86_64), Desktop: GNOME 2.32.0, Display Server: X Server 1.9.0, Display Driver: NVIDIA 270.41.19, OpenGL: 3.3.0 NVIDIA, Compiler: GCC 4.4.5, File-System: ext4, Screen Resolution: 1440x900 Battery Power Usage Idle, DPMS Off, Video Playback Milliwatts Test without aspm force on boot . MIN: 17685 AVG: 22397 MAX: 24669