I was talking about the voltage for the CPU-NB, that is the voltage for the on chip IMC (integrated memory controller). Usually it starts at about 1.12 volts and a gentle bump to say 1.2 or 1.25 can aid in stabilizing the ram.
Also 1.8 volts is stock for 800 speed DDR2. If you want to keep going higher with ram speed it may require more volts. Can you post the SPD page from CPU-Z? You can use snippet tool in Windows 7 to get a screenshot and then just add it to your post. The SPD page gives JEDEC information for the ram.
I suggested Googling a review of your ram because sometimes they OC it when they test it and that can give you a good idea how far you can push your ram and what voltage is necessary. On my son's computer we could not push his ram past about 900 because we didn't have any control over the ram voltage. I had read a review where his ram had gone as high as 1000 speed, but that was using 2.1 volts. I generally don't OC the ram very much.
Check out this link where a guy has it OC'd to 3 GHz. He had to put his ram down to 533 speed to get there. That put his ram to 746 speed.http://www.istorya.net/forums/comput...-test-log.htmlEdited by coonmanx - 6/11/10 at 9:03pm