Novice overclocker, don't know what I'm doing wrong

[ITSTHINKING]

Okay I'm trying to overclock a 4200+ x2. Its prime95 stable when I do nothing but change the htt to 225. This makes the ram overclock to 225 also, so I turn the htt up to 229 and it's no longer prime95 stable so I am thinking the ram is clocked to high. I lower the ram speed using the dram divider in the bios and it's fine but for some reason lets say I try turning the htt up to 235-240 and use the divider to keep the ram down to 200 or even slightly under, my system won't get any farther than the windows loading screen before it reboots. Any help on what I am doing wrong? I haven't touched the voltage at all because I wasn't sure what to set it too.

 

[(cf)Eclipse]

what is your ht link speed set to?

 

[cornelious0_0]

It may need a bump down to 4x at those speeds. Not all boards are the same, and i could push my DFI Ultra-D pretty far without lowering the HTT multiplier...but that's something else to give a shot without pushing any more voltage through that X2.