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My Core 2 E6400 ridiculous overclocking

Last response: in Overclocking
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December 3, 2006 6:07:43 PM

Hello guys.

I'd like your help to know why I can't overclock my Core 2 Duo E6400 more than 2.39 GHz (299 FSB x 8), a ridiculous 12%!
I'm pretty frustrated because I've seen reviews around the net saying people can OC they E6400s at more than 3 GHz easily and with my mobo.

My current setup:
CPU: E6400 with original air cooler
Mobo: Foxconn 975X7AB w/ latest BIOS
Power supply: Thermaltake 470W
DRR2: 2x GB Twinmos PC6400 (800 MHz) 5-5-5-18 (I know this sucks)
Sapphire X1300 512MB
2x Western Digital Raptor 150 GB in RAID0

My temps are really great (CPU at 25 C. and system at 33 C.) but the maximum stable speed I can get is 2.39 GHz (and I'm downclocking the memory speed at 4:5 - 749 MHz ).
With a memory:FSB ratio of 1:1 I just could get a stable 280 FSB.

My PCIe is set to 100 and Auto Detect PCI Clk is set to Enabled (though I'm not really sure what this means).

I tried increasing the CPU Vcore voltage, the DRAM voltage, the MCH voltage... nothing seems to work!
I don't want to reach speeds over 3 GHz, but at least 2.6/2.8 GHz!

Please help!!!!

Thanks a lot!!!!!


Dolphin975
December 3, 2006 7:06:52 PM

I think this is the smallest c2d oveclocking I heard of, sorry, keep trying
December 3, 2006 7:37:48 PM

You should lock your PCI Clock to 33; see what other options are available under "Auto Detect PCI Clk".
Also, check the stickies.
Related resources
December 3, 2006 7:42:51 PM

have you disabled spread spectrum, EIST and C1E :?:
December 3, 2006 7:45:19 PM

Quote:
Mobo: Foxconn 975X7AB w/ latest BIOS



this one really sucks...


go and get a GIGABYTE GA-965P S3 or DS3 for extreme oc'ng..

get also an aftermarket hsf...
December 3, 2006 8:27:40 PM

That ram is questionable for anything stable over 400fsb.
you could try upping the voltage on the ram and then tighten up the timings to 5 5 5 15 or 5 4 5 12
December 3, 2006 9:16:11 PM

Don't tighten the timings. If you can, lock your pci and ram in to slower speeds until you find the speeds you want for the cpu. Upping your voltage will also help with making a stable clock.

You should find what the ocing potential for each component is individually by under clocking everything else.

If you have any pci cars unplug them for now.
December 3, 2006 10:15:28 PM

That CPU temp seems really low...
December 3, 2006 10:17:35 PM

Hey there,
Using the same board and CPU I managed to clock to 375FSB without any problem. Make sure you disable the CPU features such as Execute Disable bit, C1E, and Virtualization (unless you really plan to take advantage of them). Start off by setting the RAM to 400MHz, and see if that gives you any more headroom. Obviously make sure Smooth overclock is enabled. You might try increasing the PCIe speed to 105 or 110 and see if that helps at all.
December 3, 2006 10:55:01 PM

SUP, Dude..."aim 4, till then u haven't overclocked",a message from the dudes at overclocking.net l8er :) 
December 4, 2006 5:06:49 AM

Its actually one of the best overclockers for 975X.
All we need know is to hear from the OP and hes results...
December 4, 2006 3:32:20 PM

hello "drew-and-not-u"!

>Using the same board and CPU I managed to clock to 375FSB without any >problem.

Glad to hear that!

>Make sure you disable the CPU features such as Execute Disable bit, C1E, >and Virtualization (unless you really plan to take advantage of them).

OK!

>Obviously make sure Smooth overclock is enabled.

Does that make a difference in your OC?
And also, I'd be very grateful if you could post your mobo settings.
(voltages, etc,)

THANK YOU!!!!
!