Hello people, 
  
I've installed Mavericks on my AB9-Pro with a PNY GT430, and all went well. 
  
The OS will start and work fine, but on reboot the AppleIntelCPUPowerManagement kext fails as no HPETs are available.   
  
If I boot to my 10.6.8 drive and run the multifail system utils to update caches and repair permissions it will boot again, but only once. 
  
Anyone having similar problems or found a fix?