E8400

Willbo said:
OK confused now. Used the following settings, got into Windows but now goes to blue screen each time with memory dump.

The settings I changed are;

CPU Host Clock Control = Enabled
CPU Host Freq = 400
PCI Express Frequency = 100
System Memory Multiplier = 2.00B
DRAM Timing Selectable = Manual
CAS Latency Time = 4
DRAM RAS to CAS Delay = 4
DRAM RAS Precharge = 4
Precharge Delay = 12

And that was it, to give me 3.6ghz, but like I say...I'm getting memory dumps now.
Click to expand...

Guess thats something to do with the memory settings being wrong or not able to take the OC? Tried doing the OC with just the CPU settings (the top 2) but that wouldnt work either....any help?
 
Have you manually set the voltage on the memory?

Look in the bios as to what your DDR18V voltages are:

do2x5z.jpg


If it is below 2.1v (e.g 2.0v) then up the voltage in MIT up one to set it to 2.1v:

sn2cmo.jpg


I have to up mine to +0.4v to get 2.1v through my Corsair Memory. Up it and reboot until you get it as close to 2.1v as you can.
 
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Tried to up the memory voltage, its currently at 1.984v so upped it by 0.1 at first which took me to 2.000v then upped by 0.2 which took me just over 2.1v

However when trying to boot into Windows with either of those settings I still got the blue screen with the memory dump after using the settings;

CPU Host Clock Control = Enabled
CPU Host Freq = 400
PCI Express Frequency = 100
System Memory Multiplier = 2.00B
DRAM Timing Selectable = Manual
CAS Latency Time = 4
DRAM RAS to CAS Delay = 4
DRAM RAS Precharge = 4
Precharge Delay = 12
DDR Overvoltage Control = 0.1v firstly, and 0.2v the second time.

I've now just tried setting system voltage control from manual to auto and its now let me boot into windows without a memory dump
 
Scrap that....Windows crashed to the blue screen with memory dump after an hour or so on FIFA09 and another hours worth of web browsing, when I checked the BIOS the memory voltage was 2.285V
 
Willbo said:
Scrap that....Windows crashed to the blue screen with memory dump after an hour or so on FIFA09 and another hours worth of web browsing, when I checked the BIOS the memory voltage was 2.285V
Click to expand...

Well your memory is rated to run at anything between 1.8v and 2.3v.

Firstly, slacken the timings on your memory to 5-5-5-15 and see if that sorts it out.

If that fails, then give Memtest a go on your memory. Burn the ISO to a blank disk if you have one and boot up with it in the drive. If you have no disks and have a flash disk, download the file for USB keys. Its unfortunately the trials and errors of overclocking which does take some time.

Start it at your rated speed of 800Mhz and leave your voltage on auto. It runs endless loops of tests on your memory but you need to let it run for several passes. As you have 4x1Gb sticks, it will take a while to run 1 pass.

Once you know that there is no fault with the memory at all, run it again with your overclock of 3.8Ghz which will run the memory at 844Mhz. If it fails, you may have to then slacken the timings on the memory to maybe 5-4-4-12 or 5-5-5-15.
 
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Ok so left the voltage on auto to start and slackened the memory to 5-5-5-12, to see how get on....going to run Orthos now.

Tried setting the voltage manually whist the memory was slackened to 5-5-5-12 with a +0.1V and +0.2V but wouldnt even get to Windows. Its only on Auto does it boot to Windows
 
Wiggins said:
When on auto, what does the DDR2 voltage say in the bios?

Try with 5-5-5-15 and not 5-5-5-12
Click to expand...

Seemed to change but when I looked in the BIOS It was as 2.237v....

So should I leave the voltage as auto and use the original OC settings as well as the memory timings you suggested of or use +0.1 (which gives me a DDR18V of 2.000v or +0.2 which gives me 2.128v?

CPU Host Clock Control = Enabled
CPU Host Freq = 422
PCI Express Frequency = 100
System Memory Multiplier = 2.00B
DRAM Timing Selectable = Manual
CAS Latency Time = 5
DRAM RAS to CAS Delay = 5
DRAM RAS Precharge = 5
Precharge Delay = 15
 
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Drop the timings to 5-5-5-15 and use +0.2 to give it just above 2.1v.

If that fails and you get a BSOD, up the voltage to +0.3v
 
Used the above settings, with the 5-5-5-15 & +0.2 and PC wouldnt boot to Windows.
Dropped the CPU Host Freq to 400, kept timings and voltage as the same, and got to Vista load screen only for it to get blue screen with memory dump.

Have returned all to normal now to get into Windows.
 
Looks like your memory will not overclock well. :(

It may be an idea to try memtest to see if you have a faulty stick of ram.
 
Ran memtest and passed with no errors found, I did notice however that during the test it specified timings of 5-5-5-18

Tried these timings with +0.3v with the above settings and gets as far as the Vista boot screen, but get a blue screen rather than the desktop
 
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It may be that you need a little more voltage on your Northbridge.

Up the voltage on your MCH by +0.1v and see if that works.

As there are 4x1Gb sticks of ram, the memory controller on the northbridge will be working harder.
 
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Willbo said:
Cool, will have a look for it (the joys of a quiet day in work :))

Just read an E8400 OC'ing guide and was very helpful, did it on a Gigabyte board so should be the same layout as my BIOS which will be useful. They got it to 3.6ghz easily, by changing the CPU FSB, PCI Express Bus and Memory multiplier, but were able to get to 4ghz by changing the CPU voltage as well.

I know my memory is DDR2-800, which will be able to cope with the 2 x multiplier, but if I push my memory beyond, for example...forcing it to run at 890mhz, will the memory be ok?
Click to expand...

whoa link?

I've got Gigabyte board, E8400 and the same RAM as you so that would be fantastic if I could get a link :D
 
Wiggins said:
It may be that you need a little more voltage on your Northbridge.

Up the voltage on your MCH by +0.1v and see if that works.

As there are 4x1Gb sticks of ram, the memory controller on the northbridge will be working harder.
Click to expand...

This isnt prooving to be easy....tried with the original settings for a 3.8ghz OC with DDR2 voltage of +0.3v. Put MCH onto +0.1v and crashed before getting to desktop

Tried dropping the OC to 3.6ghz, DDR2 voltage of +0.3v and MCH of +0.1v, put the PCI Express frequency to auto, and loosened the timings to 5-5-5-18 and got to the desktop for about 1 sec before blue screening
 
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