this may sound very( i hate to use the term noobish )but
i have an athlon 2500 + xp. gygabyte ga-7n400 mobo,running 2gig kingston ddr. i can only run on failsafe option in the bios. at start up shows 1100 . on optimized it shows 3200 but keeps restarting will not boot windows before it restarts. temp stays 48c. any ideas? oh im running a 450 ps.