i need some advise about my O.C setting

my pc spec is
mobo - GA-P35-DS3
ram - 4GB ; 2x value kingston DDR2 800MHz
proc - e2180

1st setting
-cpu multiplier set to default x10
-cpu freq set to 300
-memory divider at 3.33
so result = cpu clock @3000MHz / memory clock @1000MHz / FSB at 1200MHz
everyday used nothing problem, no crash, no hang, no blue screen, BUT....
test using Everest system stability - had some error after 2~3 minutes test

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2nd setting
-cpu multiplier set to x8
-cpu freq set to 380
-memory divider at 2.5
so result = cpu clock @3040MHz / memory clock @950MHz /FSB at 1520Mhz
test using Everest system stability test - no error at all
so now i stick at 2nd setting.
cause the high FSB...so far i monitor the mobo temperature is arround 30~39' celcius

so, any problem with my setting?
is setting cpu multiplier from default x10 to x8 cause any prob to my proc?