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QX6700 Unable to OC past 3.0GHz

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June 23, 2008 10:02:24 PM

Hi All,

I am trying to overclock my QX6700, but am unable to get it to go past 3.0GHz. Every time I try and overclock past 3.0Ghz the system just hangs and I have to reset the bios. Its my understanding that I should be hitting 3.0GHz easily by only upping the FS bus. Am I missing something here or am I just an unlucky owner of a chip that does not like to overclock?

Any suggestions you guys can offer is greatly appreciated.
Please see my system specs below...

CPU: QX6700
CPU Cooling: Zalman CNPS9700
Motherboard: DFI 680i LT
RAM: 2 x 4gigs Muskin 4-4-4-12 800MHz PC2 6400 (dual channel)
Video: 2x EVGA 8800GT (SLI)
Power Supply: Rosewill 850W
Sound: Sound Blaster X-Fi Platinum
OS:Vista Premium 64-Bit sp1
a b à CPUs
June 23, 2008 10:25:43 PM

I have a QX6700 but I use an intel 975xbx2 mb. I am currently at 340 for the FSB which gives me 3.4G. I think I have upped the cpu voltage a little, but normally that is not always required to reach 3-3.4 or so.

You should be able to hit 3.0 or 3.2 easily without any voltage tweaks.

I have overclocked my system up to 3.8G and increased the FSB to 1600 but it was generating so much heat I backed it down.

If your memory settings are not correct, you could be overclocking your RAM which would cause it to fail. Check that first. Im thinking it should be set to a 1:1 ratio. Some systems default the RAM ratio to 4:5 or 2:3 (this speeds up memory at default clock speeds, but overclocks your RAM in a hurry)

Other than that you should make sure your voltages are on the money. Some BIOS's will give you a measurement. You may have to measure your power supply outputs to verify. Rosewill isnt known for being the best quality out there.

Make sure you have good contact with your CPU cooler. You will start generating some good heat at 3.0G.

Other than that more detail on how it is failing.

Good luck
June 23, 2008 10:47:22 PM

runh your cpu at stock speeds to see what your temps are. if you're running hot at stock speed, then it might be a problem you can solve by reseating the heatsink on the cpu.

also, your PSU isn't of the greatest quality, it could very will be the problem. try taking out one of the 8800GTs and see if that helps the overclock.
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June 23, 2008 11:05:36 PM

vvhocare5 said:
If your memory settings are not correct, you could be overclocking your RAM which would cause it to fail. Check that first. Im thinking it should be set to a 1:1 ratio. Some systems default the RAM ratio to 4:5 or 2:3 (this speeds up memory at default clock speeds, but overclocks your RAM in a hurry)

Other than that you should make sure your voltages are on the money. Some BIOS's will give you a measurement. You may have to measure your power supply outputs to verify. Rosewill isnt known for being the best quality out there.
Good luck

I will double check my memory configuration as soon as I get home from work. As for the power supply, I'm not familiar with testing PSU outputs. What method do you recommend for measuring it?

pinaplex said:
runh your cpu at stock speeds to see what your temps are. if you're running hot at stock speed, then it might be a problem you can solve by reseating the heatsink on the cpu.

also, your PSU isn't of the greatest quality, it could very will be the problem. try taking out one of the 8800GTs and see if that helps the overclock.

I don't think this is a heat issue because the computer never even boots up. I turn it on and the screen just stays black.
June 24, 2008 5:11:22 AM

Well...I took out one of my 8800GTs, and checked memory setting then tried to overclocking to 3.0Ghz again, but I still get the same result. It seems no mater what I try it just can't break the 3.0GHz barrier (so frustrating). I posted screenshots of my bios configuration below. Maybe someone can spot something wrong or suggest something else. Thanks again.




June 24, 2008 5:47:15 AM

Well let's see try upping your memory voltage to 2.2 volts for 1. Change the cmd to 1t for starters
June 24, 2008 5:47:34 AM

i have a similar problem, i have a q6700 on an asus p5b and i also cannot get past the 3.0ghz barrier. i beleive its because of the poor voltage controll on my motherboard. i wouldnt think a 680i would have that kind of problem though.

from looking at your bios settings it looks like you have your memory clock mode set to linked so your memory speed increases as you increase your fsb, so it may be your memory is what is unstable. try setting the memory to unlinked and just overclock the processor.

also you will probably need to increase you voltage for the processor manualy when trying to go over 3ghz.

June 24, 2008 6:53:21 AM

kg4icg said:
Well let's see try upping your memory voltage to 2.2 volts for 1. Change the cmd to 1t for starters

I just tried this and it still hangs before booting.

briandr said:
i have a similar problem, i have a q6700 on an asus p5b and i also cannot get past the 3.0ghz barrier. i beleive its because of the poor voltage controll on my motherboard. i wouldnt think a 680i would have that kind of problem though.

from looking at your bios settings it looks like you have your memory clock mode set to linked so your memory speed increases as you increase your fsb, so it may be your memory is what is unstable. try setting the memory to unlinked and just overclock the processor.

also you will probably need to increase you voltage for the processor manually when trying to go over 3ghz.

I have tried all of these things also and still get the same result. Anyone have any other suggestions?
June 24, 2008 7:08:09 AM

Is it the FSB setting, or the speed of the CPU? You can always try a 333 x 8 for 2.66 and use the same FSB to make sure its causing the problems.

680i chipset boards inherently dislike to allow a good over clock by a q6x00 series. That's common knowledge, and the people that get more are lucky! So it may take some work to find out!

Run Core Temp and list your Processors' VID!

--Lupi
June 24, 2008 7:09:29 AM

Also, are the Bios pics your current settings?
a b à CPUs
June 24, 2008 8:01:54 AM

ummmmmm if you have the QX6700, why not OC with the multiplier?
June 24, 2008 9:19:20 AM

From the screenshots i noticed that your 800 mhz ram is running oced to 900 mhz. I suspect that will be the problem. I have kingmax value rams 800 mhz and the can be oced up to 820 mhz with 2.0 volt, higher than that i have to reset bios settings.
June 24, 2008 9:21:24 AM

Oh and i see that you have a cpu with unlocked multiplier... so upp teh multiplier instead of the fsb, worth a try.
June 24, 2008 9:35:23 AM

... you spend all that money on a system and get a DFI 680i LT... do you know how old this board is?
Really, why would you do this,
Anyways mod your settings slowly, and do each change one at a time, that way you know what part you did wrong.
Like others have said make sure your at 1:1 memory ratio.
Try something really easy 8x multiplier@400FSB, that =3.2Ghz, then work from there.

Ull be ok just go slow and watch your temps.

thx
SKG
June 24, 2008 12:30:56 PM

Is 1.3 volts on the NB enough?
June 24, 2008 12:55:54 PM

apache_lives said:
ummmmmm if you have the QX6700, why not OC with the multiplier?


My thoughts exactly.
!