Can't seem to get past 466 fsb!

45-ud3r
q9650 466x9= 4.19g
muskin 8500 4x2g, 2.4b =1116
true w/ sythe ultra kaze 2000 in push/pull, lapped

1.35 cpu
1.32 nb

all other settings auto

tried changing all voltages, multipliers but cant get past 4.19g (super pi 1m=11.123 secs)

temps def not prob, very well ventilated case- all stress tests runs 8+ hours

waiting on new ocz blades 1200- think mem is the prob

anyone with ideas?

thx