Its your 1440 HTT thats the problem. Put your HTT at 4X and crank the chip slowly up to 250 with a 10X multi. You shouldnt have to touch the voltage unless you want to go over 2500mhz. Your temps should stay about the same. My X2 4400+ started at 2.2 ghz and I didnt need to up the vcore till after 2.5ghz. Right now I have it at 2640mhz with a vcore of 1.41 on air and my wife keeps our house hot. I never have temp problems. Your RAM should be able to handle a 250fsb at a 1:1 setting and if it doesnt just add a bit of voltage to it but I wouldnt sugest going over 2.7v just to stay safe.
So in short try these settings. RAM 1:1, HTT 4X, FSB 250, Multi 10X, lower your Vcore to 1.45. Raise your RAM voltage to 2.65 or 2.7.
Your CPU will run cooler on these settings and much faster. All these settings are safe, the worst that can happen is you wont be able to boot into windows and in that case just set everything back. Nothing lost, nothing broken. Get back to me with the results.