I just finished my new rig (first intel build) and need help overclocking my e8400.
I have a biostar Tpower I45 mobo, which has .008 vdroop(if my calculations are correct.)
So I disabled speedstep and C1E so my cpu is running at a steady clock, and upped the multiplier to 400.
so my problem is, when i overclock the ram, and cpu voltages go up when on auto. But the smallest vcore increment .025 so I can't keep the cpu at stock voltages(1.186v I believe) while overclocking.
Yes those numbers are the amount over stock voltage. My guess is that the bios wont let you go to 400fsb with stock voltage because it is not a stock bus speed. You could confirm this by resetting your bus speed to 333 and see if your are allowed to use stock voltage or under volt then.
I have the option to undervolt all the time but when I undervolt by the smallest imcrement @3.6ghz it can't pass 1 min on orthos stress test.
when i bring it back down to stock clock and put it in auto voltage It runs at what I believe is stock voltage 1.184v. Then I try to overclock in auto voltage mode and it shoots to voltage up to like 1.228 volts.
you can go to 1.45v max w/o damaging the processor but should probably aim for 1.40v max to be safe. make sure to keep the cpu temp under 70C under full load. OC'ing an at not a science but you can read up on varrious faqs on the web to get started.