well, i saw a lot of pics about the same 9950 125 CPU, they reach 3.2 or maybe 3.3 !
you can just google it, i tried to do as same as they did, but it's just not stable, i think the problem i have is from the mobo it's old ! it's the ASUS M2N32 SLi Deluxe WE, maybe thats the reason !
Well, OC your processor to a stable frecuency. Run prime95 for at least 1 hour, and after that, try to OC a little more, run the test again....and do the same 'till you can get the max stable OC for your CPU.