help for Overcloking E6400

J

jcovarrubiasu

n00b
Joined
Apr 9, 2007
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Hi. I have some problems getting a decent overclocking above 2.6 ghz for E6400

This is Rig.
2ghz 4*512 Patriot Extreeme Performance
Core 2 Duo E6400
Motherboard ASUS P5B-E
Case: Tuniq 2
Vortex vx

Right now it-s working at 2.6 ghz (325*8) at 1.4V and under load the cpu is at 45 and vcore1 and and 2 arround 39C The rest of the parameters at set to default.

However. I would like to take it at least to 3.0GHZ. I set the the FSB to 375 The computer will not start, I have tested 1.4v 1.425v At it simple will not. I am wonder whitch values should I use.

Should I modify the DRAM frequency and memory voltage?
 
Update. I was able to get this up to 2.67 GHZ

FSB (335 * 8)
DRAM frequency set to auto
pci express frequency set to auto
pci clock sync mode auto
spread spectrum enabled
memory voltage is auto
cpu vcore voltage is at 1.4v
FSB termination Voltage is auto


This is the part that it is confusing
If I set the dram frequency to 1:1 (670) it will not start the Bios will just freeze.
 
Set your memory voltage to 2.1 to 2.2 volts and see what happens.

Also loosen up your memory timings to CL 5-5-5-15. It's best to take your memory out of the equation so that it doesn't hold you back.

My P5B Deluxe likes the cpu voltage set to 1.45 volts in the bios.

At 1:1 for your memory you should be able to set it to 400 X 8 and boot right up. If you have any problems let me know and I'll send you what bios settings have worked well for me.

What does CPUz say for the Revision of your E6400? The new L2 revision are the Allendale cores and some people have had trouble overclocking them. The previous revision B2 Conroe cores are generally simple to get 3200 MHz out of.

You might also want to try removing two of your memory modules while testing. Having 4 modules in there can reduce your overclock and could be holding you back.
 
u need to set ur pci express frequency to 100
and clock sync mode to 33.33 in the bios...
 
Ok I have tried this values without any luck

FSB at 400
dram 1:1
PCIE at 100 and auto
pci clock sync 33.33 and auto
memory voltage at 2.10
cpu vcore at 1.45
fsb termination voltage at 1.45 and auto

None of this values works.

By the way I don't know how to set up the memory to 5-5-5-15,. How do you do this on
p5b-e
 
I have done more testing. I was able to put this with all things in auto again to 2.76(345*8) with 1.412 v and pci express to 100, However, if I go to 355*8 the bios halts and I am not able to boot, then I attemempted to put more voltage to CPU to 1.425 but got the same ressults.

Now A few comments.
+ If I am working at 335*8 works fine (everyhting auto except Vcore voltage to 1.4) then If I configure the DRAM frequency to 1:1 The bios won't boot

+ The maximum voltage that I can configure for the RAM is 2.1volts.

+ Then when Windows starts loading at 345*8 with PCI expresst o 100. windows halts and won't initialize.

+ The code name for my core 2 duo is Conroe. revision L2
 
I'm not sure about the P5B-E but with the Deluxe to adjust memory timings you go into the bios and select:
Advanced -> Chipset -> North Bridge Configuration



I prefer setting the timings manually because on AUTO you're never sure what you're going to end up with. These are real basic timings which any memory should be happy with. Once this is set try going back and locking your memory at 1:1 again.

Lots of people say there's not much difference between a P5B-E and the Deluxe but obviously the most important difference is memory voltage options. The Deluxe lets you go up to 2.45 volts.

There are no guarantees that with only 2.1 volts and 4 sticks of memory you are ever going to go much higher than what you're getting now.

Even though many software programs mis-report Conroe / Allendale you can't argue with the revision number. An L2 revision E6400 is an Allendale and not a Conroe.
You're not the first person to have trouble overclocking one of these models.
 
unclewebb said:
I'm not sure about the P5B-E but with the Deluxe to adjust memory timings you go into the bios and select:
Advanced -> Chipset -> North Bridge Configuration



I prefer setting the timings manually because on AUTO you're never sure what you're going to end up with. These are real basic timings which any memory should be happy with. Once this is set try going back and locking your memory at 1:1 again.

Lots of people say there's not much difference between a P5B-E and the Deluxe but obviously the most important difference is memory voltage options. The Deluxe lets you go up to 2.45 volts.

There are no guarantees that with only 2.1 volts and 4 sticks of memory you are ever going to go much higher than what you're getting now.

Even though many software programs mis-report Conroe / Allendale you can't argue with the revision number. An L2 revision E6400 is an Allendale and not a Conroe.
You're not the first person to have trouble overclocking one of these models.
Click to expand...



Thanks for the values, unfortunely my Motherboard or my memory did not like them. I was not able to boot with them., My FSB is at 335 * 8 at 2.68 ghz, CPU voltage is at 1.3525 everything else is set to auto.

Thanks.
 
I have good news!!!

I started from scrach, everything set to auto. then I configure the memory like you said! It worked. set the vocre voltage to 1.325 (I think it is a low value, but anyway) the computer starts!!

I am running at 3.2 GHZ and my CPU temp is at 48 under load and my vcore 1 and to are at 40C I am using the CTEMP value is at 40

Under load I am displaying 1.27v for the cpu and the memory is at 2.1v... +

On IDLE is at 1.30

Are this good numbers?
 
I read the mhy previews note and I did not understand it correctly

Right now I am running at
3.2 (400*8), Voltage for CPU set on the bios is 1.325, The voltage on IDLE is arround 1.30 according to speed fan v4.32

This are temps that I get under Load (Compressing video with DIVX,. Multithread) USING Speed Fan 4.32

System temp is 55C
CPU is 48C
HD0 is 32
hd1 is 36
Core 0 IS 49
Core 1 is 49

Are this # safe?

Thanks.
 
Another happy customer is good to hear! :)

Ignore system temp and CPU temp. They are meaningless numbers.

Your hard drives HD0 and HD1 at 32C and 36C are right where they're supposed to be.

The numbers that are the most important are your core temps.
49C is an excellent load temp. You have lots of room to overclock further if you wish. I can run Orthos day and night as long as the temps keep under 70C to 72C.

Use Orthos to test and only use as much cpu voltage as you need. I like using 400 X 8 because you can run your memory at 1:1 or DDR2-800 speed which most memory is capable of with the appropriate voltage. Now you also know that your processor is capable of at least 3200 MHz. 412 X 8 or 425 X 8 are also good combinations. As my sig says, I set my Asus bios to 1.450 volts which gives me 1.424 volts at idle and 1.392 volts when running Orthos. Approximately 1.40 volts while under load is where you need to be for 3400 MHz.

Happy overclocking.
 
I was running some test with Orthos. the temps got a little higher but as you said, I have more rome they get to 59C runing the "stress cpu test" I run it for about 30 minutes and I did not see any problem

However, when I run the "blend - stress cpu and RAM" I got an error right away (10 seconds after starting the test)"


" test 1, 4000 - lucas Lehmer, iteration's of MI9922945 using 1024K FFT length
FATAL ERROR rouding was 0.5, expected less than 0.4
Hardware failure detected, consult stress.txt file ... etc "

Any Idea what this means?

If I run any game, runs great, C# Compiling does great, etc. this is the only error that I have seen running this test..

any Idea what this means?
 
jcovarrubiasu: I'm not sure what settings you're running at now.

If you have errors when running Orthos then try increasing the core voltage by +0.025 volts and see if that makes things any better.

If you are still at 3200 MHz you will likely need a bios setting close to 1.400 volts to be 100% Orthos stable.
 
unclewebb said:
jcovarrubiasu: I'm not sure what settings you're running at now.

If you have errors when running Orthos then try increasing the core voltage by +0.025 volts and see if that makes things any better.

If you are still at 3200 MHz you will likely need a bios setting close to 1.400 volts to be 100% Orthos stable.
Click to expand...

Yes I put the voltage to 1.4v and completed 5 *4000 iterations without any problem in about 10 - 12 minutes, and expected the CPU temp rised to 65C so I guess this is my MAX, I am not sure to push this farther away! But I guess it is ok for Air cooler (vortex vx) for about 25 USD.....

Some times I wonder, if it would be the same with the stock cooler?
 
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