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Overclocking a C2D E6300 Conroe

post #1 of 23
Thread Starter 
I've been bumping the FSB up little by little, and I'm actually pleasantly surprised how high I've been able to take it stable. However, I think I've hit a point where I'm going to have to tweak other areas to proceed.

First, when running Super PI mod 1.5, if I get errors (below), is that an indication that FSB is too high, or CPU voltage is too low, or what? It had been a few minutes since Super PI completed, so the temps had dropped. They were up around 65-70c.

PIError.jpg

Secondly, as I understand it, I should keep the voltage below 1.5v for this CPU. Why is it then that CPU-Z reports a core voltage of 1.544? In the BIOS it's set to auto, but if I manually set it to, say, 1.3250, CPU-Z won't match. And what is the VID in Core Temp (1.3250v)?

I've seen some other people get over 3.6GHz out of this chip, so I'm guessing I've got some more room.
Edited by Quasimojo - 10/4/11 at 1:28pm
post #2 of 23
Pi is not a sufficient stress test to rely on CPU stability.. your having RAM errors by the looks of it too...

*If your less than 3ghz on CPU speed I seriously doubt you need so much vcore.. try lowering it down to 1.4v for now.. and set your FSB Term. Voltage to 1.35 - 1.4v as well [due to your current FSB]. You may find more stability with those voltages for your CPU... you still need to run something like IBT or Prime95 for CPU testing though... you can use 32mil Pi for RAM testing if you like.
post #3 of 23
Thread Starter 
Quote:
Originally Posted by CL3P20;15177927 
Pi is not a sufficient stress test to rely on CPU stability.. your having RAM errors by the looks of it too...

*If your less than 3ghz on CPU speed I seriously doubt you need so much vcore.. try lowering it down to 1.4v for now.. and set your FSB Term. Voltage to 1.35 - 1.4v as well [due to your current FSB]. You may find more stability with those voltages for your CPU... you still need to run something like IBT or Prime95 for CPU testing though... you can use 32mil Pi for RAM testing if you like.

Thanks. Edited my post to mention that the CPU voltage (vcore?) is set to auto in the BIOS and whatever I set it to manually isn't properly represented by CPU-Z.

I'll try your suggestions.
post #4 of 23
for this mobo.. leave all of your ram options on Auto for now.. and set the following voltages:

FSBv - 1.4v
vcore - 1.44v
RAM - keep your current setting
MCHv- highest setting.. think its 1.65v [required for tuning with 4x GB's of RAM on this chipset]

Set PCI-E clock to 104mhz
Set ICHv to 1.21v [or highest setting]
Set SBv to auto

**P5B-Dlx is my favorite mobo.. The last one I had served as a daily user running 575mhz FSB with a E8400 wink.gif
post #5 of 23
Thread Starter 
Quote:
Originally Posted by CL3P20;15178023 
for this mobo.. leave all of your ram options on Auto for now.. and set the following voltages:

FSBv - 1.4v
vcore - 1.44v
RAM - keep your current setting
MCHv- highest setting.. think its 1.65v [required for tuning with 4x GB's of RAM on this chipset]

Set PCI-E clock to 104mhz
Set ICHv to 1.21v [or highest setting]
Set SBv to auto

**P5B-Dlx is my favorite mobo.. The last one I had served as a daily user running 575mhz FSB with a E8400 wink.gif

Awesome. Ok, when setting the vcore and FSBv as suggested, they both turned purple. The MCHv (I'm assuming NB vcore?) turned red when set to 1.65v.

Gonna wait on your response before I save it. /imaskeerd
Edited by Quasimojo - 10/4/11 at 1:43pm
post #6 of 23
Thread Starter 
Ok, as I was nervous moving so much beyond recommended limits, I back all of those settings off until they were displayed as white and rebooted. Now the system freezes before I can even get into the BIOS. I was able to get into it a couple of times, but it actually froze while I was in the BIOS.

Gonna have to clear the CMOS and start over. :/
post #7 of 23
Auto on voltage is always to heavy for Vcore

Give this a go (make sure pci is on 100Mhz and Vcore is set to manual & @ the core VID recommended for the chip (realtemp can tell you this) and all others on auto for now) and that your ram is set to run at stock speed (keep checking as this will creep up with the fsb)

Just follow the steps:

1. creep up (15/20) FSB until you don't post into windows.

2. increase Vcore one notch and try to boot (if you don't boot to windows increase vcore again until you get into windows.)

3. THEN try prime95 for 15 mins just to make sure your ok to go on. (if it fails up Vcore) and try again on prime95 until ok

4. then start knocking up the FSB again repeat (steps 1 to 3) until you are @ your required speed or your Vcore/ temps are to High and you need to go back a few setting.

Do this for now and see where you get to post back with any issues and where you are up to (ie Vcore/fsb)
Mr Ivy
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Mr Ivy
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post #8 of 23
The high MCHv will be needed for pushing latency with 4GB's of RAM.. this older 965p chipset is best run over 450fsb with 2GB's of RAM only. For me, 1.65v on the NB required a small fan to keep NB temps down.. but I was then able to clock to excess of 550fsb

heres a ss of mine running orthos at 520fsb
520mhz_P5B_e8400.jpg

this shot shows voltages:
sample_AMscore_2.jpg
post #9 of 23
Thread Starter 
Quote:
Originally Posted by aramil;15178980 
Auto on voltage is always to heavy for Vcore

Give this a go (make sure pci is on 100Mhz and Vcore is set to manual & @ the core VID recommended for the chip (realtemp can tell you this) and all others on auto for now) and that your ram is set to run at stock speed (keep checking as this will creep up with the fsb)

I finally found where I could see what the BIOS was starting the vcore at. Under Hardware Monitoring, where it shows me temps and fan speeds, it showed the vcore to be 1.3250v. That sound about right?

Anyway, in the process of stumbling through it last night, my hard drive got corrupted and no amount of Windows repair attempts could fix it, so I had to reinstall. On the plus side, all my stuff was on my data drive, so I didn't really lose anything, and I now have a clean install from which to bench. tongue.gif

At this point I'm back to a 400MHz FSB, 100MHz PCI-e, 33.3MHz PCI and memory at 800MHz. Everything else is set to AUTO. It appears to be stable, as I ran through the RealTemp probe test using Prime95 with no issues.

I'll need to review your suggestions and give it another go tonight and see if I can get it over 3.0GHz without getting too deep in to the guts of it.

Baby steps. tongue.gif
Quote:
Originally Posted by CL3P20;15180668 
The high MCHv will be needed for pushing latency with 4GB's of RAM.. this older 965p chipset is best run over 450fsb with 2GB's of RAM only. For me, 1.65v on the NB required a small fan to keep NB temps down.. but I was then able to clock to excess of 550fsb

That's incredible. Was that on air cooling? I'm guessing you weren't running PC6400 RAM. tongue.gif
post #10 of 23
Quote:
Originally Posted by Quasimojo;15186934 
I finally found where I could see what the BIOS was starting the vcore at. Under Hardware Monitoring, where it shows me temps and fan speeds, it showed the vcore to be 1.3250v. That sound about right?

I'll need to review your suggestions and give it another go tonight and see if I can get it over 3.0GHz without getting too deep in to the guts of it.

Baby steps. tongue.gif

1.325v looks about right-ish.

setting the Voltage manually will give your more control and you will know how close you are to maxing you OC out without the danger of "auto" overvolting your CPU.....

it should also help keep the temps down "as more Volts = higher temps" which should allow you to push your OC higher

you can always come back here and knowing your Vcore fsb etc we can advise you on NB voltages etc
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Mr Ivy
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