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Can upgrade solve my problems?

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I have now installed OSX 10.9 Mavericks on my pc. It works great till it totally freezes. I don't know how to fix it. The only thing i can do is move the mouse but nothing reacts to it. To solve this i need to reboot the system and everything works again. Sometimes for just halve a minute, sometimes for half an hour but it will freeze again.


The only thing i need OSX for is to use XCode. 


Can my problem being solved by upgrading to OSX Yosemite? Or is it just hardware that conflicts with OSX? Now i can use it (as long as it won't freeze, but will this improve with an update or could it also be much worse then?)


System Specs:

- CPU ( Intel Core i5 750 2,667GHz)

- Graphic Card (nVidia GeForce MSI GTX 460 Twin Frozr)
- MotherBoard Chipset (Asus P7P55D-E PRO)
- Ethernet (Realtek RTL8168D/8111D PCI-E Gigabit)

- RAM (4096MB)

- Keybaord: Logitech G510

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I had the same sort of problem on my AMD FX 8350 it would work for a few minutes maybe an hour and randomly freeze.

what fixed it for me was. i updated the bootloader and added the flags in the config file npci=0x2000.

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Thanks, but i already have npci=0x2000 (followed by dart=0)


How can i upgrade the boot loader?


Thanks again!

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