I'm having strange lockups in boot process . The computer hangs at "Checking NVRAM" , just before it begins to boot from HDD . The problem is only happening when i have raid mode enabled in ICH9R and have a plextor 760sa plugged in one sata port (5 or 6) .
Removing the sata burner , everything works properly .

Anyone else with this problem ???? Raid mode and optical (ROM or burner) in sata ports ???