Overclocking an E6600

division72

division72

division72

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Birmingham
I have the following kit:

Core 2 Duo E6600
Asus P5ND2 SE motherboard
2Gb of Corsair Value Select 667MHz memory (set timings at 5-5-5-15 @ 1.8v)

The problem that I am having is that I can't get an FSB of higher than 285MHz.Iif I try to go higher, the computer locks up on the bios display screen, meaning I have to clear the CMOS to get back onto it. I have tried increasing the Vcore up to 1.38 Volts, and have swithced off speedstep, but it doesn't seem to be working. I kept the memory at it's rated speed and voltage to make sure that it isn't the cause. Does anyone have experience with this board as there doesn't seem to be much info about O'cing with it, as I'm completely stuck.
 
i have never had ram running stable at 1.8v m8,
im sure(99%) the asus P5N series can run unlinked(cpu/ram) so you can oc the cpu only and not the ram
ive got a E6600 and needs Volts for any kind of oc. at 1.38v,by the time you account for the v drop it will be like running stock or lower(1.35).
to see how much v drop you are getting, set volts in bios,write down,load windows,then run CPUZ....http://www.cpuid.com/cpuz.php
id up the v on the cpu to 1.4, but watch temps as i dont know your cooling
ive P5B DLX wifi and i need to set my v core to at least 1.425 to get fsb to 333
hope this helps m8;):D
 
I'm only going by the SPD reading in CPU-Z for the memory voltage as I can't fine any info on Corsairs website to say what it should be running at, but it is riunning stable at that voltage. I've managed to get up to 2.68Ghz on the stock vaotage (which fluctuates between 1.344V and 1.36V at full load) by upping the northbridge from 1.4V to 1.5v (only two options in the bios 1.4V or 1.5V).

Trying to go further by upping the VCORE (from 1.36V up to 1.412V) had no effect (almost boots into windows but crashes), so now I'm stuck.

Would switching to faster 400MHz corsair XMS2 memory be better, or is the value select stuff holding me back.

P.S. I'm using an Arctic Cooling Freezer 7 Pro cooler, by the way.
 
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Thanks - upping the DRAM to 1.9V got me through that part, boots into windows and completes a session in ORTHOS (@297.5MHz FSB).

Now gone for the 300Mhz FSB, and got the same problem. Upped the DRAM all the way to 2.1V (as high as it can go). Boots the BIOS screen but crashes while booting into windows. Also tried upping the Vcore to 1.425V but no joy.

Any ideas? :confused:
 
Hey I've got an E6600 running on an Asus P5B Deluxe board currently running at 340*9= ~3.06GHz @ only 1.1625vCore (set in BIOS).
I'm running Corsair XMS2 PC6400 800MHz RAM @ 1020MHz 5-5-5-15 2.05v Orthos stable.

I'd take a look at getting the XMS2 RAM if I were you, it's fairly cheap and good for 1066MHz @ 2.1v That way you'll know it's not holding you back.

My idle temps are around 35°C with a Zalman CNPS-9500. Not the best of coolers so it hits ~55°C when under full load from TAT.

By the way for anyone interested my VID is 1.2375v and I've pencil modded my motherboard.

I'm not aware of the setting on your board but when I change my FSB sometimes I will have to knock my RAM down a divider to keep it at the right speed.
 
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I'm using the option which allows me to seperately change the FSB and the memory speed (keeping the memory speed @ 667Mhz) and just upping the FSB.
 
I've solved it. For some reason the memory speed had increased even though I was using the option to tweak the CPU and memory speeds independently. I tried reducing the memory to a 1:1 divider and hey presto it booted and everything seems OK. So that must mean that my RAM was overlcokced as far as it would go, and that is why I could go no further. Still, it's good to know that my RAM will go up to 730Mhz (up from 667Mhz) and run stable!
 
I'm now up to 2834MHz with the following settings:

FSB = 315Mhz x 9 (stock Vcore)
Memory = 5-5-5-15 timings @ 1.9v running with a 1:1 divider

My Pc boots into windows OK, but after about an hour of running Orthos, my PC had restarted itself automatically.

Is now th eitme to start upping the Vcore, and if so, what is the best way of finding what my stock voltage is?
 
I also ran memtest to see of it is the RAM causing the problem, and it reported 1 error. I decided to set the timings back to auto in the bios and ran memtest again. On returning to my PC I found it had restarted itself. Should I perhaps try increasing the voltage on my RAM or do you think the Value Select stuff just isn't up to OC'ing.

I'm already thinking of upgrading to some better quality PC2-6400 RAM, maybe some OCZ Platinum (on overclockers for about £30.).
 
I've managed to get up to 315Mhz FSB, but trying to go up to 320MHz causes my system to restart itself when running the Orthos blend test or memtest. I tried lowering the divider but that caused my system to fail to POST, so now I'm stuck.
 
I would definately recommend upgrading your RAM. You may be able to get more out of your current RAM with more volts, ~2.1 is the usual area for 800MHz upwards speeds. Research and find out if yours will take this much.

also check your VID in coretemp, let us know what you've got :)
 
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