Strange 4200+ x2 problem

[degen]

I got an AM2 4200+ x2 and ive been ocing it but ive ran into a weird problem. I can get my chip up to 2.6 - 2.7 if i 1:1 divider and 2.6 using no ram divider just loser ram timings which means my ddr2 is running at 437x2 mhz (rated 400x2) ne higher it doesnt like it and wont even turn on - problem is if i change my divider to ne thing other than 1:1 it wont post unless im rebooting over and over and over even then its a bit iffy, got it running at mo at 2614 @ 237x11 (because i cant use ram dividers - mb is good to 310) - HTT is 4x and temps are at 48 / 46 running dual core prime for 20min so far
ram = corsair 6400 c5 xms2 dual channel
mb = abit kn9s
neeeeeeeed help please want bigger ocs!

 

[Boyo]

I can't get past 237x11 on my 4400+ 939 chip....it's a strange coincidence.

 

[degen]

getting past 237x11 doesnt seem to be the problem ive got it at 246x11 (2712mhz) at the moment with no memory divider just higher timings so memory is oc'd to 900mhz and its running stable so far the problem is i cant lower my multiplier to up my HTT ne more because i cant actually use a ram divider its annoying
edit; got it going at 270x10 ram is running at 1080MHz i got a feeling it wont be stable with a 280 OC