Help overclocking e5200

ok, i don't know how to take a screenshot of my bios settings, but i hope someone can shed a little bit of light for me here.

here are my specs:

Cpu= E5200
cpou cooler= arctic cooling freezer 7 pro
Mobo= Ga-ep43-ud3l
Memory= G.skill 4gb (2x2gb) 1066 ddr2
Power supply= cooler master (dunno exact model, but has 500 whatts)
case= antec 300 with 5 fans all running at full speed

i overclocked my cpu successfully to 3.75 ghz (12.5 x 300) @ 1.375 vcore. the memory is set at auto @ 450 x 2 (900 effective) with default memory voltage (1.8). Cpu temps are 35 c idle and 59 under full load.

i'm trying to up the fsb, but the darn thing will not even boot if i go anything past 300 fsb, even at a 6x multiplier.

i don't know what is holding me back, i've tried different vcore, even went as high as 1.42 (i'm scared to go any higher than that).

my goal is to have a fsb of 333 with a multiplier around 9-10, so that i can run my cpu and memory at a 1:1 ratio. Currently it is at 2:3 (cpu:mem) ratio.

is my mobo limiting me from going any higher? or is it my particular cpu?

i'm happy with 3.75, but i rather have lower mhz in exchange for a higher fsb.

also if i touch anything on the memory settings, my comp won't boot, so i kept all memory settings at auto.

Higher FSB does not scale linearly in performance. It seems counterproductive but you gain practically no real world performance.

Run your memory at 1:1 by taking the System Memory Multiplier off AUTO and set it to the first 2.00 that you see. You should be able to squeeze a few more MHz out of the coew.