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e6400 + Asus P5W Deluxe not going pass 3.0GHz?

Last response: in Overclocking
July 31, 2007 3:10:43 AM

Hi Guys/Gals. My overclock goal with my system is 3.2GHz and I am currently unable to reach that goal. I need some help getting there from my current 3.0GHz and help is very much appreciated =).

I have a system set up with the following components:

Intel e6400 + Scythe Ninja Rev. B
Asus p5w dh deluxe
OCZ platinum xtc 2x512 DDR2-800, Rated @ 4-5-4-15
eVGA 7600GT

Current stable (Orthos 8 hours) BIOS setup as follows:

CPU Frequency: 375 (Trying to get to 400)
DRAM: 750 (Trying to get 800)

Performance Mode: Standard
PCI Express Frequency: 100
PCI clock synchronization mode: 33.33

Memory Voltage: 2.1
CPU Vcore Voltage: 1.3125 (tried to increase by 0.0125 increments to 1.5V)
FSB Termination Voltage: 1.30
MCH Chipset Voltage: 1.65
ICH Chipset Voltage: Auto (tried 1.20)

Config DRAM timing by SPD: Enabled (Tried 5-5-5-15 and 6-6-6-18)
DRAM ECC Mode: Disabled
Hyperpath 3: Disabled
DRAM Throttling: Auto

C1 Control: Disabled
Virtualization Tech: Disabled
Intel Speedstep: Disabled

Ambient Temperature: 24C
CPU: 38C
Core : 53C
LOAD (with TAT)
CPU: 50C

If everything stayed the way it was described above, except CPU frequency is set to 400 and DRAM @ 800, it will boot successfully into Windows, then be very unstable. If I let my system run for a while (surf a bit, chat a bit), I will eventually get a BSOD. When I start to run SuperPI or Memtest, the system will immediately freeze.

I do not know how to reach a stable 3.2GHz, so I call on this wonderful community's expertise to help me. What other settings do I need to adjust to achieve 3.2GHz? Help is very much appreciated and I will be glad to answer questions that will assist you in helping me :lol:  Thanks a ton.
August 1, 2007 3:59:29 AM

If it helps, I tried running my CPU @ 266 and ram @ 400, 4-5-4-15, 2.1V today and it was memtest 7h stable. I need to be pointed in the right direction of what settings to change to get stable 3.2GHz =/
August 1, 2007 5:45:22 AM

Since you are underclocking your ram already, I would set it to all defaults, and remove that from being a possible problem.

You may need to add cooling to your Northbridge, as that could be what is keeping you down.

I would also disable DRAM Throttling.

CPU voltage seems a bit low for going that high. You may want to bump it a little bit.

Other than that, everything else looks ok to me. It could be that you have hit your ceiling with that particular combination. Let us know what you find out.
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August 1, 2007 7:07:12 AM

what kind of harddrive you have
August 1, 2007 9:04:38 PM

I tried to set ram to 4-5-4-15 with all the other settings the same, but it won't boot into BIOS @ 370-400FSB. I have to enable timing by SPD to boot into windows.

Gee, really do hope its not a northbridge cooling problem. I've read some stuff about the mobo over @ xtremesystems and I doubt its the northbridge overheating. However, it's been I'll put a fan over there just in case.

I've disabled DRAM throttling @ 400FSB, and I get the same behavior as before.

I've gone all the way up to 1.5Vcore, but I get the same thing.

If 3.0GHz is the ceiling with this, i'm gonna :cry:  I'll try every single combination in BIOS till it works. :lol: 

I have a Seagate Barracuda 7200.10 SATA 3.0Gb/s 320-GB Hard Drive

Thanks for the help.
August 2, 2007 10:36:28 AM

Don't ramp your PCI-E frequency to more than, say, 115-odd MHz.

I couldn't get higher with a P4 631 than 3.3GHz (from 3GHz stock) until I allowed the PCI-E clock to synch with the FSB.

I am NOT buying my next motherboard without taking a very close look at the BIOS first. Now that my PCI-E frequency is at 120MHz and my CPU at 3.6GHz (240MHz x15) - 24 hours Prime95 stable.

Oh yeah, it still POSTs up to 248MHz (996MHz FSB), and boots directly into an error message going on about there being nothing in the PC to boot from... HDD bottleneck... great...

Hope this helps...
August 18, 2007 6:09:20 AM

Thanks for the reply mugz. What calculation do I need to make to synch the PCI-E clock to the FSB? At 3.2GHz, I tried 105-115MHz PCI-E frequency. It would BSOD the instant I got into windows with a 0x0000007E or 0x0000007F or 0x0000008F or win2k.sys error.