i'm new to this e8400 overclocking

[googlesomething]

my computer
Thermaltake Armor
ARCTIC COOLING Freezer 7 Pro 92mm CPU Cooler
OCZ 700W Power Supply
GIGABYTE GA-EP35C-DS3R
Intel E8400
OCZ Platinum Series 4GB PC-8500

i have researched overclocking to some extent and what i have gathered is keep my cpu voltage below 1.4 and get my cpu host frequency to 400 mhz and my cpu clock ratio to the highest which my bios only goes to 9X and CIA2 disabled and performance enhance to standard.well i am not having no luck getting my cpu overclocked i can set my voltage to about 1.4 and my system will boot but if i try to change my cpu host frequency to 400mhz my system will attempt to boot but it will shut off then try to boot up only to shut down again and then shut off again then it will boot windows so common sense says it is changing my settings in my bios back to default to boot and i also just updated my bios to f3 thinking that was a problem but no so can some body help me i know its hard to explain to a nOOb but i do understand most things lol TIA

should i be overclocking my memory too
fyi my case has alot of air moving through it i have never felt hot air coming out the back and my heatsink is in front of a 120mm fan that blows air out the back plus i have fans on my harddrives so heat is not a issue

 

[masteryoda34]

Did you change your FSB frequency directly to 400? If so, you need to do it in gradual steps. Try upping it by 5-7 MHz at a time, with a reboot between each change.

 

[OverVolt]

Underclock your memory when figuring out your CPU's maximum frequency at the predetermined voltage you feel is safe.

For a 45nm, I chose 1.36v as my maximum. You can do 1.4v, but I use this rig for everyday stuff.

 

[googlesomething]

i underclocked my memory to 800Mhz and that seemed to work. in CPU-Z it showing clock(core#0) bus speed is 400 mhz and core voltage is going up and down is that normal and when i run a video converter i get temps up to 50 and my core speed goes to 3600.0 Mhz underload but when my computer is at idle it goes to about 2400.0 MHz and temps down to 39. so is 3.6Ghz pretty good? and will i always have to have my memory underclocked?

 

[SlitheryDee]

Originally posted by: googlesomething
i underclocked my memory to 800Mhz and that seemed to work. in CPU-Z it showing clock(core#0) bus speed is 400 mhz and core voltage is going up and down is that normal and when i run a video converter i get temps up to 50 and my core speed goes to 3600.0 Mhz underload but when my computer is at idle it goes to about 2400.0 MHz and temps down to 39. so is 3.6Ghz pretty good? and will i always have to have my memory underclocked?

I've seen bioses that list memory dividers as what the memory speed "would be" if you were using the default FSB. That is to say, your memory frequency "would be" 800mhz if your FSB was 333mhz. The actual divider would be 5:6 (fsb:dram) I think. This would mean that your "actual" memory frequency at 400mhz fsb would be 960mhz. This would also explain why you were failing to post at what seemed to be the proper memory setting as the same divider (5:8?) that gets you 1066 at 333mhz would put you at ddr2 1280mhz at 400mhz fsb.


IF I'm right about this you should choose the 3:4 memory divider to achieve 1066mhz ddr2 at 400mhz fsb. Of course that gives you a listed speed of 888mhz in the bios which I'm pretty sure I've never seen as an option. I'm just going off of what I've seen in other non-intel motherboards here because my own motherboard give an accurate listing of what the memory speed will be at any given fsb.

If I'm wrong about this please ignore this post.

 

[Duvie]

What are you other voltages?

Vfsb?
northbridge?

Sounds like you have speedstepping on....That will make the idles look good but knowing that air cooler I bet you hit into the mid 60's with small FFT of orthos....

What stepping do you have? Many E0 stepping E8400's I have seen should be able to do 3.6ghz at click above stock volatge if not at stock vcore.

My older E8400 did 4ghz but needed 1.41v actual...I used water cooler...I dont think air would have cut it with that one...

 

[BTRY B 529th FA BN]

first, run the fsb from 333 to 400, set the strap to 400, then see what memory options you have. do not run the voltage above 1.365, infact, its probaby the memory or NB that needs more voltages than stock

 

[googlesomething]

i tried finding speedstepping in power options but no luck but i have heard that if "always on" is selected speedstepping is disabled and my steeping is E24861-001,i got my cpu up to 3.87ghz with fsb to 430 with voltage under 1.36 and my vcore is 1.332 and again thanks for all of your help i didn't think i could get this far but with a little help and google and common sense possibility are endless

i got my memory to SPD 2.40 (and in bold 1066Mhz) 1032Mhz to post so progress but how do i change my northbridge voltages is that FSB +0.2v and should i change my memory voltage

 

[Bman123]

I overclocked my rig today and it was a piece of cake.ALmost the same as yours too.

I just went in,sent the memory divider to 2.Changed cpu host frequency to 400mhz.Changed from turbo to standard.Rebooted and waalaa 3.6ghz.

No problems either.

 

[googlesomething]

disabled cie support so no speedstepping anymore.tried fsb 445mhz with a voltage of 1.36 which is 4.0ghz but got errors on prime95 so probably could try higher voltage but no real need for it just playing around to see what my boundaries are.okay back to memory voltages i read on ocz site that my memory is 2.2v and a thread at xs was saying to up my memory voltages by +0.4 which sounds right but still need info on my northbridge voltage setting

 

[Bman123]

I didn't change anything on the NB voltage.All i did was set the memory divider,apply the fsb to 400mhz and now I am sitting comfy at 3.6ghz.

I am probably gonna leave it there since I doubt if I will see a big improvement in performance with going any higher.Plus I donot want to mess anything up.This was my first ground up build plus my first time overclocking a cpu.

It went very easy so I am very happy

 

[Paraguay11]

Raise the nb voltage by .1+ it will allow you a higher overclock before you hit the next strap. Once you reach 400 the overclock will be CPU based not mobo related.