I am at 38% OC and 172.5MHz memory clock (2.5-3-3-7). I put 1.625V on core and 2.5V on memory (asynchronic). As I push any of parameters it crashes in winxp or doesn't boot at all. Prime95 and memtest are o.k., but orthos (blend mode) shows a red screen over 11min that says hardware error, unpredictable calculation result, instead of 4xxxxxxxxxxxx is 9xxxxxxxxxxxx. Is there anything to be done to proceed with OC, or is this bleeding edge of my PC?