E8400

Willbo

Willbo

Willbo

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Joined
28 Jul 2004
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Solihull, Birmingham
Been looking at the CPUs on OCUK and seen that some are now "guaranteed" to reach a certain speed and on the advert they give a description of what you need to do, for example this is on the E8600;

OcUK is now guaranteeing that when you purchase one of these E8600 processors it will run at 4.00GHz or faster prime stable! In order to achieve this you are required to enter your motherboards BIOS and make the following changes in the CPU section of the BIOS:-
1. CPU Setup - User Defined
2. Multiplier - 10 / Default
3. Front Side Bus (FSB) - 400MHz
4. CPU Core voltage - You might need to take this upto 1.40v maximum but generally 1.38v is fine dependent on the motherboard.​

Going on this basis, what would the basic settings be for upgrading an E8400? Would it be very similar to this? I'm a complete novice to OC'ing and if this could act as a guide to a couple of settings in the BIOS to change I'd be happy
 
I'm currently running 4GB (4 x 1) Geil PC2-6400C4 800MHz Ultra Low Latency DDR2 with a Gigabyte GA-P35C-DS3R motherboard.

Would love to get into OC'ing because I've heard about such good OC's on the E8400...if I could push it as high as poss wit my Noctua NH-U12P CPU cooler that would be great and I'd really appreciate your help Matt.

How can I find out about what stepping it is? I bought the CPU back in January of this year if thats any help, and at the time (I know everyones CPU might be different) but people were talking about hitting 3.6ghz + on air cooling
 
Would be great if I could...I know every CPU is differen but I've just had a look at your OC Database and noticed that someone has submitted an E8400 on a GA-P35-DS3R mobo with a clock speed of 4104...I know it obviously depends on patience to keep trying and testing to push as far as possible, and obviously the exact batch of CPU and revision of mobo, but that would be great to get anywhere near that.


Just not sure how I go about it
 
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?
 
Thought I said earlier, but my memory is Geil PC2-6400C4 800MHz Ultra Low Latency DDR2.

So when I get home tonight if I try and OC to the settings that will take me to 3.6 on OC'ing the CPU alone, and go from there memory wise to see just how high I can take it?
 
didnt know you could get 120mm fans to blow on the northbridge,

Sorry if its a dumb question but I'm new on all this OC since the days of changing a jumper on a sys board set what speed the CPU ran at :)
 
Is that only really necessary if I push everything to the limits? Or just a safe bet to have no matter what?

So far I've changed the CPU Host Freq to 400mhz, set the PCI Express Freq to 100mhz, set the system memory multiplier to 2.00B and set the timing controls for the memory to the timings specified on the memory itself...this has got me 3.6ghz and no real difference to heat and no problems with booting into Vista
 
I just followed a guide on the internet I found for E8400s for gettin 3.6ghz and that was the settings in the BIOS he changed, so just followed suite to get a rough idea of whats what before experimenting more with peoples help.

Think my vcore is on auto yeah, well the CPU Voltage Control setting is on Normal and the Normal CPU Vcore is greyed out and not able to be changed.

Cant see where I'd change the voltage for the memory.
 
OK will have a look, does that enable me to change some of the settings then that I couldnt alter before? Because F1 in my BIOS brings up the help I think.

Will give it a go and see what happens because currently I've been using the MB Intelligent Tweakers (M.I.T.) in the Gigabyte BIOS
 
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.
 
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?
 
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
 
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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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.
 
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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