the cpu became unstable, it's usual for AMD cpu after few years use
usually you need to reinstall the OS after you changed the motherboard
it has dual bios, so no worry if things went wrong
vertex3 to the intel sata III port WD disk and LG optical drive to the intel sata II port leave the marval port empty
for pure gaming i5 is good enough, suggest Z77 + i5 3570K
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