Overclocking help needed - E6420/P35-DQ6 etc

emporer · 3 Jun 2007 at 10:07

I have the Gigabyte P35-DQ6 mobo and E6420 c2d with 3gb Corasir XMS2 6400C4 ram (2*1gb/2*512), I can overclock to 2.93ghz at 8*366 but if I push to 400 it wont even boot to post, it just resets itself back to 8*266 and thus 2.13ghz. I'd like to get this to about 3.4/3.6 on the Zalman 9500 cooler in there but am a bit stuck now, ive tried upping t he cpu voltage to 1.4 but its still the same. This is my first venture into overclocking since the old Celeron days so I am out of touch.

Any help is appreciated.

dC2006 · 3 Jun 2007 at 10:58

I have the same motherboard and cpu as yourself running at 8x400 vcore 1.41. The nb volt is 0.10, pcie volt 0.10, fsb volt 0.10. My ram is Crucial Ballistix 8500 running on 2:3 div ddr2 600 5-5-5-12 2.3 volt. Dunno if any of that helps, but at around this mhz speed you dont really need to increase any voltages apart from cpu and ram and your mem ratio. I found out that apart from the 2:3 div (3:00 in bios) my system wasnt that quick, even at 7x500 1:1 low ram timmings. Currently using the F3 bios, avoid F4 as it is crap, there is however a performance enhanced bios out in prolly a week from what I`ve read on other forums.

Heh, just re-read your post and realised you have 3 gig of ram. That it self may have something to do with your overclock, I`d get rid of the 2x 512mb and keep the 2 x 1 gig sticks and run them in dual channel. You may be running your ram in flex mode which is not true dual channel. Could be wrong though

emporer · 3 Jun 2007 at 16:14

the ram is running true dual channel and not flext so thats not the prob, I do however have the F4 bios which I recently upgraded to, although I cant see that being the problem. how is the F4 bios crap compared to the F3?

do you think i'd have to change the latency of the ram, currently at 4-4-4-12?

barrymacp · 3 Jun 2007 at 16:20

The other 2x 512mb will limit your overclock id just use the 2x 1gb and should help your overclock.

emporer · 3 Jun 2007 at 18:35

i never realised that could limit the overclock, the ram is all of the same spec just 2 different sizes ie 2*1gb and 2*512mb, I have them running in proper dual channel aswell, could this really be the problem?